T20 Service Manual (S/N 008000 ) Tennant Rider Floor Scrubber Manaul Sn Up
2018-06-12
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T20 (S/N 008000) Rider Scrubber English EN Service Information Manual The Safe Scrubbing Alternative® ES® Extended Scrub System Tennant True® Parts Hygenic® Fully Cleanable tanks FloorSmart® Integrated Cleaning system IRIS® a Tennant Technology Pro-Panel™ Controls Insta-Fit™ Adapter For the latest Parts Manuals and other language Operator Manuals, visit: www.tennantco.com/manuals 9016205 Rev. 00 (5-2017) *9016205* INTRODUCTION INTENDED USE This manual is available for each new model. It provides necessary operation and maintenance instructions. The T20 is an industrial rider machine designed to scrub hard surfaces (concrete, asphalt, stone, synthetic, etc). Typical applications include industrial warehouses, manufacturing facilities, distribution facilities, stadiums, arenas, convention centers, parking facilities, transportation terminals, and construction sites. Do not use this machine on soil, grass, artificial turf, or carpeted surfaces. Do not use where excessive debris is present such as leaves, paper, etc. This machine can be used both indoors and outdoors, but ensure there is adequate ventilation if used indoors. This machine is not intended for use on public roadways. Do not use this machine other than described in this Manual. Read this manual completely and understand the machine before operating or servicing it. This machine will provide excellent service. However, the best results will be obtained at minimum costs if: • The machine is operated with reasonable care. • The machine is maintained regularly - per the machine maintenance instructions provided. • The machine is maintained with manufacturer supplied or equivalent parts. PROTECT THE ENVIRONMENT Please dispose of packaging materials and used machine components such as batteries in an environmentally safe way according to your local waste disposal regulations. Always remember to recycle. Tennant Company PO Box 1452 Minneapolis, MN 55440 Phone: (800) 553- 8033 www.tennantco.com PerformanceView, Pro−ID, Pro−Check, Zone Settings, Thermo− Sentry, Touch−N−Go, 1−STEP, Clean−Wedge, Variable Drain Valve, EasyOpen, Grip−n−Go, MaxPro, Dura−Track, SmartRelease, InstantAccess, Duramer, FaST−PAK, ErgoSpace, and Lower Total Cost of Ownership are trademarks of Tennant Company. Specifications and parts are subject to change without notice. Original Instructions. Copyright © 2017 Tennant Company. All rights reserved. MACHINE DATA Please fill out at time of installation for future reference. Model No. - _________________________________________ Serial No. - _________________________________________ Installation Date - ____________________________________ SERIAL NUMBER LOCATION CONTENTS CONTENTS INTRODUCTION....................................................2 INTENDED USE.....................................................2 MACHINE DATA.....................................................2 SERIAL NUMBER LOCATION.........................2 CONTENTS............................................................3 SAFETY PRECAUTIONS.......................................6 GENERAL INFORMATION...................................10 ELECTRICAL COMPONENT LOCATOR.......10 HYDRAULIC COMPONENT LOCATOR........19 SPECIFICATIONS.........................................27 MAINTENANCE...................................................31 MAINTENANCE CHART................................32 YELLOW TOUCH POINTS............................35 LUBRICATION...............................................35 ENGINE OIL..............................................35 SQUEEGEE CASTER BEARING.............35 FRONT WHEEL SUPPORT BEARING.....35 STEERING CYLINDER BEARING .........35 REAR WHEEL BEARINGS.......................36 TORQUE TUBES−CYLINDRICAL BRUSHES............................................36 TORQUE TUBES−DISK BRUSHES.........36 PIVOT SHAFT−DISK BRUSHES..............36 HYDRAULICS ...............................................37 HYDRAULIC FLUID .................................38 HYDRAULIC HOSES ...............................38 ENGINE - GAS/LPG......................................39 COOLING SYSTEM .................................39 AIR FILTER ..............................................40 FUEL FILTER (LPG).................................40 LPG VAPORIZER.....................................40 FUEL FILTER (GASOLINE)......................40 ENGINE BELT ..........................................41 PCV SYSTEM ..........................................41 SPARK PLUGS − MITSUBISHI ENGINES .......................41 CAMSHAFT AND BALANCE SHAFT BELTS −MITSUBISHI ENGINES ........41 ENGINE - DIESEL.........................................42 COOLING SYSTEM .................................42 AIR FILTER ..............................................43 FUEL FILTER............................................43 FUEL LINES..............................................43 PRIMING THE FUEL SYSTEM.................44 T20 Service Information (5-2017) ENGINE BELT ..........................................44 BATTERY ......................................................44 FUSES AND RELAYS....................................45 RELAY PANEL FUSES AND RELAYS......45 ENGINE HARNESS FUSES AND RELAYS ......................................46 OPTIONAL RELAYS ................................46 CIRCUIT BREAKERS (EC−H2O).............46 SCRUB BRUSHES AND PADS ....................46 DISK BRUSHES............................................46 REPLACING DISK BRUSHES OR PAD DRIVER ...............................................47 REPLACING DISK PADS ........................47 CHECKING THE DISK SCRUB HEAD STOP BUMPERS ................................48 CYLINDRICAL BRUSHES.............................49 REPLACING OR ROTATING CYLINDRICAL BRUSHES...................49 CHECKING CYLINDRICAL BRUSH PATTERN...............................50 ADJUSTING THE CYLINDRICAL BRUSH TAPER ...................................51 ADJUSTING THE CYLINDRICAL BRUSH WIDTH....................................51 SIDE BRUSH (OPTION) ...............................52 REPLACING THE SIDE BRUSH..............52 FAST SYSTEM..............................................53 REPLACING THE FAST−PAK CARTON..53 CLEANING THE FAST SUPPLY HOSE CONNECTOR......................................54 CLEANING THE FAST SYSTEM FILTER SCREEN..............................................54 REPLACING THE FAST SYSTEM ..................... FILTERS...............................................54 EC−H2O MODULE FLUSH PROCEDURE..........................................55 CLEANING THE EC−H2O FILTER SCREEN....................................56 SQUEEGEE BLADES....................................57 REPLACING (OR ROTATING) THE REAR SQUEEGEE BLADES .........................57 REPLACING OR ROTATING THE SIDE SQUEEGEE BLADES..........................59 REPLACING OR ADJUSTING THE SIDE BRUSH SQUEEGEE BLADE (OPTION).............................................61 LEVELING THE REAR SQUEEGEE........62 ADJUSTING THE REAR SQUEEGEE BLADE DEFLECTION..........................63 SKIRTS AND SEALS.....................................64 3 CONTENTS SCRUB HEAD SKIRT...............................64 RECOVERY TANK SEAL .........................64 SOLUTION TANK SEALS ........................64 BRAKES AND TIRES....................................65 BRAKES....................................................65 TIRES........................................................65 FRONT WHEEL .......................................65 PROPELLING MOTOR..................................65 PUSHING, TOWING, AND TRANSPORTING THE MACHINE........................................66 PUSHING OR TOWING THE MACHINE.............................................66 TRANSPORTING THE MACHINE............66 MACHINE JACKING......................................68 STORAGE INFORMATION............................68 FREEZE PROTECTION (MACHINES WITHOUT EC−H2O SYSTEM) ...........69 FREEZE PROTECTION (MACHINES WITH EC−H2O SYSTEM) ...................69 PRIMING THE EC−H2O SYSTEM...........71 ELECTRICAL TROUBLESHOOTING..................72 SCHEMATIC SYMBOLS................................73 MACHINE ELECTRICAL SCHEMATIC.........74 DIESEL ENGINE HARNESS ELECTRICAL SCHEMATIC............................................81 GAS ENGINE HARNESS ELECTRICAL SCHEMATIC............................................82 LPG ENGINE HARNESS ELECTRICAL SCHEMATIC............................................84 T20 OPTION COMPONENTS.......................87 KEY SWITCH.................................................88 MAIN BRUSHES ON.....................................91 SCRUB VACUUM ON AND SQUEEGEE DOWN................................92 SIDE BRUSH ON...........................................93 TANK LEVEL SWITCHES..............................94 AUTO-FILL SOLENOID.................................95 CONVENTIONAL DETERGENT PUMP AND ES PUMP........................................96 HORN............................................................97 REVERSE PROPEL......................................98 SHUTDOWN RELAY.....................................99 STARTING SYSTEM ON.............................103 GLOW PLUGS ON......................................105 CONVENTIONAL MAIN AND SIDE BRUSH SOLUTION VALVES..............................106 FAST SYSTEM ON......................................107 FUEL LEVEL SENSORS.............................108 IMPACT, HYDRAULIC TEMP AND FILTER SENSOR...............................................109 4 OIL PRESSURE, TEMPERATURE, AND MIL SYSTEM................................................110 FUEL PUMP AND ENGINE SPEED CONTROL.............................................112 KEY ON POWER DISTRIBUTION..............115 KEY OFF POWER DISTRIBUTION.............116 HORN..........................................................117 ENABLE/DISABLE CHART.........................118 CONTROL BOARD CONNECTORS (P1)...119 CONTROL BOARD CONNECTORS (P2)...120 FAULT INDICATORS...................................121 CONDITION AND WARNING INDICATORS.........................................122 HYDRAULIC TROUBLE SHOOTING.................123 HYDRAULIC SCHEMATIC SYMBOLS........124 HYDRAULIC SCHEMATIC..........................126 OPERATING MATRIX..................................128 OPTION COMPONENTS............................129 HOSE GROUP: STEERING AND PROPEL................................................130 HOSE GROUP: PUMP AND VAC FAN........131 HOSE GROUP: CYLINDRICAL BRUSH.....132 HOSE GROUP: DISK BRUSH.....................133 HOSE GROUP: SQUEEGEE LIFT..............134 SCRUB HEAD LOWER...............................135 SCRUB HEAD LIFT.....................................136 SQUEEGEE LOWER...................................137 SQUEEGEE LIFT........................................138 MAIN BRUSH ON (CYLINDRICAL).............139 MAIN BRUSH ON (DISK)............................140 SIDE BRUSH ON.........................................141 SCRUB VACUUM FAN ON..........................142 SCRUB VACUUM FAN AND SIDE BRUSH ON..................................143 SIDE BRUSH LOWER.................................144 SIDE BRUSH LIFT.......................................145 SIDE BRUSH EXTEND...............................146 SIDE BRUSH RETRACT.............................147 HYDRAULIC SOLENOID VALVE DETAILS................................................148 SERVICE............................................................149 PRO-PANEL SERVICE MODES..................149 SERVICE MODE.....................................149 MANUAL MODE.....................................150 CONFIGURATION MODE......................151 SELF TEST MODE.................................152 INPUT DISPLAY MODE..........................153 THROTTLE ADJUST MODE...................154 T20 Service Information (5-2017) CONTENTS DOWN PRESSURE ADJUST MODE.....155 MEMBRANE TEST MODE.....................157 MEMBRANE PANEL SERVICE MODES.....158 SERVICE MODE.....................................158 MANUAL MODE.....................................159 CONFIGURATION MODE......................160 SELF TEST MODE.................................161 INPUT DISPLAY MODE..........................163 THROTTLE ADJUST MODE...................164 DOWN PRESSURE ADJUST MODE.....165 MEMBRANE TEST MODE.....................167 FRONT TIRE AND WHEEL SUPPORT.......168 REPLACE FRONT DRIVE WHEEL........168 T20 Service Information (5-2017) 5 SAFETYPRECAUTIONS PRECAUTIONS SAFETY IMPORTANT SAFETY INSTRUCTIONS − SAVE THESE INSTRUCTIONS SAFETY PRECAUTIONS The following precautions are used throughout this manual as indicated in their description: WARNING: To warn of hazards or unsafe practices that could result in severe personal injury or death. CAUTION: To warn of unsafe practices that could result in minor or moderate personal injury. FOR SAFETY: To identify actions that must be followed for safe operation of equipment. The following information signals potentially dangerous conditions to the operator. Know when these conditions can exist. Locate all safety devices on the machine. Report machine damage or faulty operation immediately. WARNING: Flammable materials can cause an explosion or fire. Do not use flammable materials in tank. WARNING: Flammable materials or reactive metals can cause an explosion or fire. Do not pickup. WARNING: Moving belt and fan. Keep away. WARNING: Engine emits toxic gases. Serious injury or death can result. Provide adequate ventilation. WARNING: Burn hazard. Hot surface. Do NOT touch. CAUTION: LPG engine will run for a few seconds after key is turned off. Apply parking brake before leaving machine. WARNING: Do not spray people or animals. Severe personal injury can result. Wear eye protection. Hold sprayer with two hands. WARNING: This machine contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. This machine may be equipped with technology that automatically communicates over the cellular network. If this machine will be operated where cell phone use is restricted because of concerns related to equipment interference, please contact a Tennant representative for information on how to disable the cellular communication functionality. FOR SAFETY: 1. Do not operate machine: − Unless trained and authorized. − Unless operator manual is read and understood. − Under the influence of alcohol or drugs. − While using a cell phone or other types of electronic devices. − In dusty environments without the vacuum fan on. − Without filters in place or with clogged filters. − Unless mentally and physically capable of following machine instructions. − If it is not in proper operating condition. − With pads or accessories not supplied or approved by Tennant. The use of other pads may impair safety. − In areas where flammable vapors/liquids or combustible dusts are present. − In areas that are too dark to safely see the controls or operate the machine unless operating / headlights are turned on. − In areas with possible falling objects unless equipped with overhead guard. 2. Before starting machine: − Check for fuel, oil, and liquid leaks. − Keep sparks and open flame away from refueling area. − Make sure all safety devices are in place and operate properly. − Check brakes and steering for proper operation. − Adjust seat and fasten seat belt. 3. When starting machine: − Keep foot on brake and directional pedal in neutral. T20 Service Information (5-2017) T20 Gas/LPG 9016200 (08−2016) 64 Home Find... Go To.. SAFETY PRECAUTIONS SAFETY PRECAUTIONS 4. When using machine: − Use only as described in this manual. − Use brakes to stop machine. − Do not pick up burning or smoking debris, such as cigarettes, matches or hot ashes − Go slowly on inclines and slippery surfaces. − Do not scrub on ramp inclines that exceed 10% grade or transport (GVWR) on ramp inclines that exceed 14% grade. − Reduce speed when turning. − Keep all parts of body inside operator station while machine is moving. − Always be aware of surroundings while operating machine. − Do not access the video / help screens while the machine is moving. (Pro−Panel). − Use care when reversing machine. − Keep children and unauthorized persons away from machine. − Do not carry passengers on machine. − Always follow safety and traffic rules. − Report machine damage or faulty operation immediately. − Follow mixing, handling and disposal instructions on chemical containers. − Follow safety guidlines concerning wet floors. 5. Before leaving or servicing machine: − Do not park near combustible materials, dusts, gases, or liquids. − Stop on level surface. − Set parking brake. − Turn off machine and remove key. 6. When servicing machine: − All work must be done with sufficient lighting and visibility. − Keep work area well ventilated. − Avoid moving parts. Do not wear loose clothing, jewelry and secure long hair. − Block machine tires before jacking machine up. − Jack machine up at designated locations only. Support machine with jack stands. − Use hoist or jack that will support the weight of the machine. − Do not push or tow the machine without an operator in the seat controlling the machine. − Do not power spray or hose off machine near electrical components. − Disconnect battery connections before working on machine. − Avoid contact with battery acid. − Avoid contact with hot engine coolant. − Do not remove cap from radiator when engine is hot. − Allow engine to cool. − Keep flames and sparks away from fuel system service area. Keep area well ventilated. − Use cardboard to locate leaking hydraulic fluid under pressure. − All repairs must be performed by a trained service mechanic. − Do not modify the machine from its original design. − Use Tennant supplied or approved replacement parts. − Wear personal protective equipment as needed and where recommended in this manual. For Safety: wear hearing protection. For Safety: wear protective gloves. For Safety: wear eye protection. For Safety: wear protective dust mask. 7. When loading/unloading machine onto/off truck or trailer: − Drain tanks before loading machine. − Lower scrub head and squeegee before tying down machine. − Turn off machine and remove key. − Use ramp, truck or trailer that will support the weight of the machine and operator. − Do not load/unload on ramp inclines that exceed 18% grade. − Use winch. Do not drive the machine onto/off the truck or trailer unless the load height is 380 mm (15 in) or less from the ground. − Set parking brake after machine is loaded. − Block machine tires. − Tie machine down to truck or trailer. 7 T20 Service Information (5-2017) T20 Gas/LPG 9016200 (08−2016) 5 SAFETY PRECAUTIONS SAFETY PRECAUTIONS The following safety labels are mounted on the machine in the locations indicated. If these or any labels become damaged or illegible, install a new label in its place. WARNING LABEL − Flammable materials or reactive metals can cause explosion or fire. Do not pick up. WARNING LABEL − Do not spray people or animals. Severe personal injury can result. Wear eye protection. Hold sprayer with both hands. FOR SAFETY LABEL − Read manual before operating machine Located on the side of the operator compartment. Located on the side of the operator compartment. CAUTION LABEL − LPG engine will run for a few seconds after key is turned off. Apply parking brake before leaving machine. Located on frame of machine. 8 6 Located next to the ignition switch on the instrument panel. (LPG machines only) T20 Service Information (5-2017) T20 Gas/LPG 9016200 (08−2016) SAFETY PRECAUTIONS WARNING LABEL − Flammable materials can cause explosion or fire. Do not PRECAUTIONS use flammable SAFETY materials in tank. WARNING LABEL − Machine emits toxic gases. Serious injury or death can result. Provide adequate ventilation. Located next to the solution tank covers and on the detergent tank. Located on the side of the operator compartment. WARNING LABEL − Moving belt and fan. Keep away. WARNING LABEL − Burn hazard. Hot surface. Do NOT touch Located on the side of the bumper, on the exhaust shield, on the hydraulic reservoir, and on the scrub head (disk head machines only). T20 Gas/LPG 9016200 (08−2016) Home T20 Service Information (5-2017) Located on engine compartment panel. 7 Find... Go To.. 9 GENERAL INFORMATION GENERAL INFORMATION ELECTRICAL COMPONENT LOCATOR T20 Electrical Component Locator Page 1 of 10 VALVE SOL‐7 10 T20 Service Information (5-2017) GENERAL INFORMATION T20 Electrical Component Locator Page 2 of 10 IGNITION SWITCH S‐1 SPRAY NOZZLE SWITCH S‐25 LIGHT SWITCH S‐4 ACCESS PANEL FOR RIGHT SIDE of ENGINE ACCESS PANEL REMOVED T20 Service Information (5-2017) HORN SWITCH S‐22 11 GENERAL INFORMATION T20 Electrical Component Locator Page 3 of 10 12 T20 Service Information (5-2017) GENERAL INFORMATION T20 Electrical Component Locator Page 4 of 10 T20 Service Information (5-2017) 13 GENERAL INFORMATION T20 Electrical Component Locator Page 5 of 10 GAS/DIESEL FUEL LEVEL SENDER S-7 HYDRAULIC FILTER CLOGGED SWITCH S-17 GAS/LPG ENGINE DIAGNOSTIC CONNECTOR FRONT TOP VIEW FRONT FaST COMPONENTS 14 HYDRAULIC OIL TEMPERATURE SENSOR S-20 (BACK SIDE) T20 Service Information (5-2017) GENERAL INFORMATION T20 Electrical Component Locator Page 6 of 10 AUTO FILL SOLENOID VALVES INNER VIEW SOL-2 SOL-1 ES PUMP RECOVERY TANK HALF FULL SWITCH S-16 OUTSIDE TANK FRONT TOP VIEW INSIDE TANK SPRAY NOZZLE/WAND PUMP T20 Service Information (5-2017) RECOVERY TANK FULL SWITCH S-15 15 GENERAL INFORMATION T20 Electrical Component Locator Page 7 of 10 Diesel Engine Coolant Temperature Sensor Crankshaft Position Sensor Oil Pressure Switch 16 T20 Service Information (5-2017) GENERAL INFORMATION T20 Electrical Component Locator Page 9 of 10 GAS/LPG T20 Service Information (5-2017) 17 GENERAL INFORMATION T20 Electrical Component Locator Page 10 of 10 GAS/LPG 18 T20 Service Information (5-2017) GENERAL INFORMATION HYDRAULIC COMPONENT LOCATOR T20 Hydraulic Component Locator Page 1 of 8 SIDE BRUSH MOTOR VACUUM FAN MOTOR CYLINDRICAL MAIN BRUSH MOTOR (REAR) FRONT PROPEL MOTOR T20 Service Information (5-2017) LEFT SIDE SQUEEGEE LIFT CYLINDER 19 GENERAL INFORMATION T20 Hydraulic Component Locator Page 2 of 8 SIDE BRUSH MOTOR VACUUM FAN MOTOR PROPEL MOTOR DISK MAIN BRUSH MOTORS LEFT SIDE SQUEEGEE LIFT CYLINDER 20 T20 Service Information (5-2017) GENERAL INFORMATION T20 Hydraulic Component Locator Page 3 of 8 HYDRAULIC OIL RESERVOIR HYDRAULIC OIL FILTER STEERING VALVE FRONT CYLINDRICAL MAIN BRUSH MOTOR (FRONT) T20 Service Information (5-2017) RIGHT SIDE SQUEEGEE LIFT CYLINDER 21 GENERAL INFORMATION T20 Hydraulic Component Locator Page 4 of 8 HYDRAULIC OIL HEAT EXCHANGER SCRUB MANIFOLD SV1, SV2, SV3, SV4,SV6, SV7 RV1, RV2, CV1, PC1, PC2 i See pages 16 and 17 for more information on the Scrub and Side Brush manifolds VACUUM FAN MOTOR ACCESSORY PUMPS FRONT FRONT PROPEL PUMP SIDE BRUSH MANIFOLD SV8, SV10, SV11, SV12, PR1, PC8 22 DISK MAIN BRUSH MOTORS T20 Service Information (5-2017) GENERAL INFORMATION T20 Hydraulic Component Locator Page 5 of 8 MAIN SQUEEGEE LIFT CYLINDER T FRON T FRON STEERING CYLINDER FRONT BUMPER (INNER VIEW) SIDE BRUSH LIFT CYLINDER T20 Service Information (5-2017) SIDE BRUSH EXTEND CYLINDER 23 GENERAL INFORMATION T20 Hydraulic Component Locator Page 6 of 8 DISK SCRUB HEAD LIFT CYLINDER CYLINDRICAL SCRUB HEAD LIFT CYLINDER 24 T20 Service Information (5-2017) GENERAL INFORMATION T20 Hydraulic Component Locator Page 7 of 8 SCRUB MANIFOLD DETAILS SV1 RV1 G6 M4 M1 C1 SV6 G1 C2 SV7 G2 RV2 C3 SV3 SV4 C4 SV2 Bottom: T1, T2 T20 Service Information (5-2017) 25 GENERAL INFORMATION T20 Hydraulic Component Locator Page 8 of 8 SIDE BRUSH MANIFOLD DETAILS FRONT G13 C6 SV10 C8 G7 SV11 C7 PR1 G10 SV12 C5 T6 SV8 P3 M2 P4 & OR3 0.040 in (1.02 mm) orifice 26 T4 T3 T20 Service Information (5-2017) GENERAL INFORMATION SPECIFICATIONS T20 Specifications Page 1 of 4 T20 Service Information (5-2017) 27 GENERAL INFORMATION T20 Specifications Page 2 of 4 28 T20 Service Information (5-2017) GENERAL INFORMATION T20 Specifications Page 3 of 4 T20 Service Information (5-2017) 29 GENERAL INFORMATION T20 Specifications Page 4 of 4 30 T20 Service Information (5-2017) MAINTENANCE MAINTENANCE MAINTENANCE MAINTENANCE 9 8 16 19 15 12 20 13 18 14 7 4 10 2 11 1 17 3 5 7 20 T20 Service Information (5-2017) 6 31 MAINTENANCE MAINTENANCE CHART The table below indicates the Person Responsible for each procedure. O = Operator T = Trained Personnel Interval Daily Person Resp. Key Description Procedure Check oil level O 1 Engine O 10 Hydraulic fluid reservoir Check fluid level O 8, 9 Tank cover seals O 3, 14 O 3, 14 O 4 Lubricant/ No. of Fluid Service Points Check coolant level in reservoir O 50 Hours 6 EO 1 WG 1 HYDO 1 Check for damage or wear - 3 Main brushes (Cylindrical) Check for damage and wear - 2 Main brushes or pads (Disk) Check for damage and wear - 3 Side brush (option) Check for damage and wear - 1 Check squeegee blade for damage and wear - 1 Check for damage and wear - 1 Check deflection - 1 Rear squeegee blade O 7 Side squeegee blades Check for damage and wear - 2 O 8 Recovery tank Clean - 1 O 8 Recovery tank, ES mode (option) Clean ES filter - 1 O 9 Solution tank, ES mode (option) Clean - 1 O 5 Debris tray Clean debris tray, screen, and hose - 1 O 16 FaST/ec-H2O filter screen (Option) Clean - 1 O 3, 14 Main brushes (Cylindrical) Rotate front to rear - 2 T 3, 14 Main brushes or pads (Disk) Check brush pattern and adjust if needed - 2 T 13 Front wheel Torque wheel nuts (after initial 50 hours only) - 1 T 1 Fuel Lines (Diesel machines) Check for damage and wear and tighten loose clamp bands - 1 T 15 Battery Clean and tighten battery cable connections (after initial 50 hours only) - 1 T 1 Engine Check belt tension - 1 LUBRICANT/FLUID EO . . . . Engine oil, 5W30 SAE−SG/SH only. HYDO . TennantTrue premium hydraulic fluid or equivalent WG . . . Water and ethylene glycol anti-freeze, −34 C (−30 F) SPL . . . Special lubricant, Lubriplate EMB grease (Tennant part number 01433−1) NOTE: More frequent maintenance intervals may be required in extremely dusty conditions. 32 T20 Service Information (5-2017) MAINTENANCE Interval 100 Hours Person Resp. Key Description Procedure Lubricant/ No. of Fluid Service Points T 19 Radiator Clean core exterior - 1 T 19 Hydraulic cooler Clean core exterior - 1 T 1 Engine Change oil and filter EO 1 Drain LPG vaporizer oil buildup O 200 Hours 400 Hours 800 Hours 1000 Hours 13, 20 Tires Check for damage 1 - 3 T 6 Rear squeegee casters Lubricate SPL 2 T 6 Rear squeegee Check leveling - 1 O 2 Scrub head skirt Check for damage or wear - 1 T 3, 14 Disk scrub head stop bumper Check for damage or wear T 12 Front wheel support bearings Lubricate SPL 2 2 T 17, 18 Torque tube (Cylindrical brushes) Lubricate SPL 4 T 3, 14 Torque tube (Disk brushes) Lubricate SPL 4 T 3 Pivot shaft (Disk brushes) Lubricate SPL 4 T 12 Steering cylinder Lubricate SPL 1 T 1, 19 Radiator hoses and clamps Check for tightness and wear - 2 T 11 Brake pedal Check adjustment - 1 T 1 Engine Replace air filter - 1 T 20 Rear wheel bearings Check, lubricate, and adjust T 10 Hydraulic reservoir Replace filler cap Replace fuel filter T - Hydraulic hoses Check for wear and damage T 1, 19 Cooling system Flush T 13 Propelling motor T 13 T 15 T T - 1 SPL 2 HYDO 1 - ALL WG 2 Torque shaft nut - 1 Front wheel Torque wheel nuts - 1 Battery Clean and tighten battery cable connections - 1 16 FaST system filters Replace - 2 1 Engine (Gas/LPG Machines) Replace spark plugs - 4 T 1 Engine (Gas/LPG Machines) Inspect PCV system - 1 T 1, 19 Radiator hoses Check for cracks or deterioration - 2 LUBRICANT/FLUID EO . . . . Engine oil, 5W30 SAE−SG/SH only. HYDO . TennantTrue premium hydraulic fluid or equivalent WG . . . Water and ethylene glycol anti-freeze, −34 C (−30 F) SPL . . . Special lubricant, Lubriplate EMB grease (Tennant part number 01433−1) NOTE: More frequent maintenance intervals may be required in extremely dusty conditions. T20 Service Information (5-2017) 33 MAINTENANCE Interval Person Resp. Key Description Procedure Lubricant/ No. of Fluid Service Points 1200 Hours T 10 Hydraulic fluid filter Replace fluid filter - 1 2400 Hours T 10 Hydraulic fluid reservoir Replace strainer outlet - 1 Change hydraulic fluid HYDO 1 5000 hours 1 Replace camshaft and balance shaft belts - 2 1 Engine (Gas/LPG Machines) LUBRICANT/FLUID EO . . . . Engine oil, 5W30 SAE−SG/SH only. HYDO . TennantTrue premium hydraulic fluid or equivalent WG . . . Water and ethylene glycol anti-freeze, −34 C (−30 F) SPL . . . Special lubricant, Lubriplate EMB grease (Tennant part number 01433−1) NOTE: More frequent maintenance intervals may be required in extremely dusty conditions. 34 T20 Service Information (5-2017) MAINTENANCE MAINTENANCE YELLOW TOUCH POINTS SQUEEGEE CASTER BEARINGS Lubricate the squeegee caster bearings after every 100 hours of operation. This machine features easy to find yellow touch points for simple service items. No tools are required to perform these maintenance operations. FRONT WHEEL SUPPORT BEARING LUBRICATION Lubricate the front wheel support bearings after every 200 hours of operation. Both front wheel support grease fittings are located underneath the frame support plate. FOR SAFETY: Before leaving or servicing machine, stop on level surface, set parking brake, turn off machine, and remove key. ENGINE OIL Check the engine oil level daily. Change the oil and oil filter after every 100 hours of operation. STEERING CYLINDER BEARING Lubricate the steering cylinder after every 200 hours of operation. The steering cylinder bearing is located next to the front wheel support. Fill the engine with oil until the oil is between the indicator marks on the dipstick. DO NOT fill past the top indicator mark. The engine oil capacity for Mitsubishi engines is 4.7 L (5 qt) with oil filter. The engine oil capacity for diesel engines is 6L (6.35 qt) with oil filter. T20 Service Information (5-2017) 35 MAINTENANCE MAINTENANCE REAR WHEEL BEARINGS TORQUE TUBESïDISK BRUSHES Inspect the rear wheel bearings for seal damage, and repack and adjust every 400 hours of operation. Use Lubriplate EMB grease (Tennant part number 01433ï1). Lubricate the three torque tube fittings after every 200 hours of operation. The first two fittings are located on each side of the machine and the third is located above the center brush. TORQUE TUBESïCYLINDRICAL BRUSHES PIVOT SHAFTïDISK BRUSHES Lubricate the torque tubes after every 200 hours of operation. The torque tube grease fittings on the operator side of the machine are located beneath the fuel tank. Lubricate the pivot shaft after every 200 hours of operation. On the other side of the machine the torque tube grease fittings are located beneath the propel pump. 36 T20 Service Information (5-2017) MAINTENANCE MAINTENANCE HYDRAULICS FOR SAFETY: Before leaving or servicing machine, stop on level surface, set parking brake, turn off machine, and remove key. Replace the filler cap after every 800 hours of operation. Apply a light film of hydraulic fluid onto the filler cap gasket before installing the cap onto the reservoir. Check the hydraulic fluid level at operating temperature daily. The hydraulic fluid level should be between the two lines on the hydraulic gauge. Replace the hydraulic fluid filter after every 1200 hours of operation or if the hydraulic reservoir gauge is in the yellow/red zone when the reservoir hydraulic fluid is approximately 32 C (90 F). ATTENTION! Do not overfill the hydraulic fluid reservoir or operate the machine with a low level of hydraulic fluid in the reservoir. Damage to the machine hydraulic system may result. Drain and refill the hydraulic fluid reservoir with new TennantTrue premium hydraulic fluid after every 2400 hours of operation. WARNING: Burn hazard. Hot surface. Do NOT touch. Replace the hydraulic strainer outlet after every 2400 hours of operation. T20 Service Information (5-2017) 37 MAINTENANCE MAINTENANCE HYDRAULIC FLUID HYDRAULIC HOSES There are three fluids available for different ambient air temperature ranges: Check the hydraulic hoses after every 800 hours of operation for wear or damage. TennantTrue premium hydraulic fluid (Extended Life) Part Capacity ISO Ambient Air Number Grade Temperature Viscosity Ranges Index (VI) 1057710 3.8 L (1 gal) 1057711 19 L (5 gal) 1069019 3.8 L (1 gal) 1069020 19 L (5 gal) 1057707 3.8 L (1 gal) 1057708 19 L (5 gal) ISO 100 VI 126 or higher 19 C (65 F) or higher ISO 68 VI 155 or higher 7 to 43 C (45 to 110 F) ISO 32 VI 163 or higher 16 C (60 F) or lower If using a locally-available hydraulic fluid, be sure the specifications match Tennant hydraulic fluid specifications. Substitute fluids can cause premature failure of hydraulic components. ATTENTION! Hydraulic components depend on system hydraulic fluid for internal lubrication. Malfunctions, accelerated wear, and damage will result if dirt or other contaminants enter the hydraulic system. 38 FOR SAFETY: When servicing machine, use cardboard to locate leaking hydraulic fluid under pressure. High pressure fluid escaping from a very small hole can almost be invisible, and can cause serious injuries. 00002 Consult a physician immediately if injury results from escaping hydraulic fluid. Serious infection or reaction can occur if proper medical treatment is not given immediately. Contact a mechanic or supervisor if a leak is discovered. T20 Service Information (5-2017) MAINTENANCE MAINTENANCE ENGINE ENGINE - GAS/LPG Check the radiator hoses and clamps after every 200 hours of operation. Tighten loose clamps. Replace damaged hoses and clamps. FOR SAFETY: Before leaving or servicing machine, stop on level surface, set parking brake, turn off machine, and remove key. Check the radiator hoses for cracks and deteriation after every 1000 hours of operation. COOLING SYSTEM FOR SAFETY: When servicing machine, avoid contact with hot engine coolant. Do not remove cap from radiator when engine is hot. Allow engine to cool. Check the coolant level in the reservoir daily. The coolant level must be between the indicator marks when the engine is cold. Refer to the coolant manufacture for water/coolant mixing instructions. Check the radiator core exterior and hydraulic cooler fins for debris after every 100 hours of operation. Blow or rinse all dust through the grille and radiator fins, in the opposite direction of normal air flow. Be careful to not bend the cooling fins when cleaning. Clean thoroughly to prevent the fins from becoming encrusted with dust. To avoid cracking the radiator, allow the radiator and cooler fins to cool before cleaning. Flush the radiator and the cooling system after every 800 hours of operation. The cooling system must be completely filled with coolant to keep the engine from overheating. T20 Service Information (5-2017) 39 MAINTENANCE MAINTENANCE AIR FILTER LPG VAPORIZER Replace the air filter after every 400 hours of operation. Drain oil buildup in the LPG vaporizer after every 100 hours of operation. FOR SAFETY: When servicing machine, keep flames and sparks away from fuel system service area. Keep area well ventilated. FUEL FILTER (LPG) Replace the LPG fuel filter after every 400 hours of operation. Disassemble the fuel lock off valve to access the LPG fuel filter. FOR SAFETY: When servicing machine, keep flames and sparks away from fuel system service area. Keep area well ventilated. 40 FUEL FILTER (Gasoline) Replace the gasoline fuel filter after every 400 hours of operation. FOR SAFETY: When servicing machine, keep flames and sparks away from fuel system service area. Keep area well ventilated. T20 Service Information (5-2017) MAINTENANCE MAINTENANCE ENGINE BELT Check the belt tension after every 50 hours of operation. Adjust tension as necessary. Proper belt tension is 13 mm (0.50 in) from a force of 4 to 5 kg (8 to 10 lb) applied at the mid-point of the longest span. WARNING: Moving belt and fan. Keep away. PCV SYSTEM Inspect the PCV system after every 100 hours of operation. SPARK PLUGS ï MITSUBISHI ENGINES CAMSHAFT AND BALANCE SHAFT BELTS ï MITSUBISHI ENGINES Replace the camshaft and balance shaft belts after every 5000 hours of operation. BATTERY Clean and tighten the battery connections after the first 50 hours of operation and after every 800 hours after that. Do not remove the vent plugs from the battery or add water to the battery. FOR SAFETY: When servicing machine, avoid contact with battery acid. Replace the spark plugs after every 1000 hours of operation. T20 Service Information (5-2017) 41 MAINTENANCE MAINTENANCE ENGINE ENGINE - DIESEL Check the radiator hoses and clamps after every 200 hours of operation. Tighten loose clamps. Replace damaged hoses and clamps. FOR SAFETY: Before leaving or servicing machine, stop on level surface, set parking brake, turn off machine, and remove key. Check the radiator hoses for cracks and deterioration after every 1000 hours of operation. COOLING SYSTEM FOR SAFETY: When servicing machine, avoid contact with hot engine coolant. Do not remove cap from radiator when engine is hot. Allow engine to cool. Check the coolant level in the reservoir daily. The coolant level must be between the indicator marks when the engine is cold. Refer to the coolant manufacture for water/coolant mixing instructions. Check the radiator core exterior and hydraulic cooler fins for debris after every 100 hours of operation. Blow or rinse all dust through the grille and radiator fins, in the opposite direction of normal air flow. Be careful to not bend the cooling fins when cleaning. Clean thoroughly to prevent the fins from becoming encrusted with dust. To avoid cracking the radiator, allow the radiator and cooler fins to cool before cleaning. Flush the radiator and the cooling system after every 800 hours of operation. The cooling system must be completely filled with coolant to keep the engine from overheating. When filling the cooling system, open the drain cock to bleed the air from the system. 42 70 T20 Service Information (5-2017) T20 Diesel 9016250 (08−2016) MAINTENANCE MAINTENANCE AIR FILTER FUEL LINES Replace the air filter after every 400 hours of operation. Check the fuel lines every 50 hours of operation. If the clamp band is loose, apply oil to the screw of the band and securely tighten the band. FUEL FILTER The fuel filter removes impurities from the fuel. Replace the fuel filter after every 400 hours of operation. The rubber fuel lines can become worn−out whether the engine has been used much or not. Replace the fuel lines and clamp bands every two years. FOR SAFETY: When servicing machine, keep flames and sparks away from fuel system service area. Keep area well ventilated. FOR SAFETY: When servicing machine, keep flames and sparks away from fuel system service area. Keep area well ventilated. If the fuel lines and clamp bands are found worn or damaged before two years’ time; replace or repair them at once. Bleed the fuel system after replacement of any fuel lines, see PRIMING THE FUEL SYSTEM. When the fuel lines are not installed, plug both ends with clean cloth or paper to prevent dirt from entering the lines. Dirt in the lines can cause fuel injection pump malfunction. 43 T20 Service Information (5-2017) T20 Diesel 9016250 (08−2016) 71 MAINTENANCE MAINTENANCE PRIMING THE FUEL SYSTEM Typical diesel fuel systems require priming to remove pockets of air from the fuel lines and fuel components. This is usually required after running out of fuel, changing fuel filter elements or repairing a fuel system component. Air in the fuel prevents smooth engine operation. BATTERY Clean and tighten the battery connections after the first 50 hours of operation and after every 800 hours after that. Do not remove the vent plugs from the battery or add water to the battery. This fuel system however is self-priming. The return line comes from the top of the injector that allows the air to escape through the return line. ENGINE BELT Check the belt tension after every 50 hours of operation. Adjust tension as necessary. Proper belt tension is 13 mm (0.50 in) from a force of 4 to 5 kg (8 to 10 lb) applied at the mid-point of the longest span. FOR SAFETY: When servicing machine, avoid contact with battery acid. WARNING: Moving belt and fan. Keep away. 44 72 T20 Service Information (5-2017) T20 Diesel 9016250 (08−2016) MAINTENANCE MAINTENANCE FUSES AND RELAYS RELAY PANEL FUSES AND RELAYS Fuses are one-time protection devices designed to protect the wire harness by stopping the flow of current in the event of a circuit overload. Relays switch the electrical power going to the machine electrical systems on/off. Remove the relay panel cover to access fuses and relays. Refer to the table below for the fuses and circuits protected. Fuse Rating FU1 15 A Auxiliary Relays/Engine Controls Circuit Protected FU2 15 A Not Used FU3 15 A Horn FU4 15 A Not Used FU5 15 A Scrub Vacuum/Main Brush/ Squeegee Down FU6 15 A Enable/Side Brush FU7 15 A Solution/Auto Fill/Reverse FU8 15 A ES/FaST/Detergent/Spray Wand FU9 15 A Lights FU10 15 A Unswitched B+ for controller board FU11 15 A Not Used: Options FU12 15 A Spray Nozzle Pump FU13 15 A Not Used FU14 15 A Not Used ï 20 A ecïH2O (near ignition switch) NOTE: Always replace a fuse with a fuse of the same amperage. Extra 15 Amp fuses are provided inside the relay panel drawer on the relay panel. Refer to the diagram below for locations of the fuses and relays on the relay panel. The M10 relay for the optional spray nozzle is located behind the battery. Refer to the table below for the relays and circuits controlled. T20 Service Information (5-2017) Relay Rating M1 12 VDC, 40 A Auxiliary 1 Circuit Controlled M2 12 VDC, 40 A Auxiliary 2 M3 12 VDC, 40 A Not Used M4 12 VDC, 40 A Reverse M5 12 VDC, 40 A Horn M6 12 VDC, 40 A Shutdown M7 12 VDC, 40 A Starter M8 12 VDC, 40 A Not Used M9 12 VDC, 40 A Not Used M10 12 VDC. 40 A Not Used M11 12 VDC. 40 A FaST Water Pump (located in FaST harness) M12 12 VDC. 40 A Spray Wand (located in Spray wand harness) 45 MAINTENANCE MAINTENANCE ENGINE HARNESS FUSES AND RELAYS The engine harness fuses and relays are located in the fuse box inside the engine compartment. Refer to the fuse box cover for locations of engine harness fuses and relays. SCRUB BRUSHES AND PADS The machine can be equipped with either disk or cylindrical scrub brushes, or cleaning pads. Check scrub brushes or pads daily for wire or string tangled around the brush or brush drive hub. Also check brushes or pads for damage and wear. DISK BRUSHES Replace the brush when it no longer cleans effectively or when the bristles are worn down to the yellow indicators. NOTE: Always replace a fuse with a fuse of the same amperage. OPTIONAL RELAYS The optional spray nozzle or pressure wand relay is located behind the battery. The optional FaST scrubbing system relay is located behind the seat. Relay Rating Circuit Controlled ï 12 VDC. 40 A Spray Wand ï 12 VDC. 40 A Pressure Washer ï 12 VDC. 40 A FaST CIRCUIT BREAKERS (ecïH2O) Circuit breakers are resettable electrical circuit protection devices that stop the flow of current in the event of a circuit overload. Once a circuit breaker is tripped, allow breaker to cool and then press the reset button to manually reset the breaker. 46 Cleaning pads must be placed on pad drivers before they are ready to use. The cleaning pad is held in place the center disk. Cleaning pads need to be cleaned immediately after use with soap and water. Do not wash the pads with a pressure washer. Hang pads, or lay pads flat to dry. NOTE: Always replace brushes and pads in sets. Otherwise one brush or pad will be more aggressive than the other. T20 Service Information (5-2017) MAINTENANCE MAINTENANCE REPLACING DISK BRUSHES OR PAD DRIVER 1. Raise the scrub head. FOR SAFETY: Before leaving or servicing machine, stop on level surface, set parking brake, turn off machine, and remove key. 4. Turn the brushes until the spring handles are visible. 5. Squeeze the spring handles and let the brushes drop to the floor. 2. Open the right outer brush door. 6. Remove the brushes from underneath the scrub head. 3. Hold down the release lever and rotate the adjustable disk brush head until it is possible to access the center brush. 7. Set the brush spring open on the new brush to make installation easier. 8. Place the new brushes underneath the scrub head and lift each brush up onto the hub until the brush locks onto the hub. 9. Rotate the disk brush head back to the scrub position until the head locks into place. T20 Service Information (5-2017) 47 MAINTENANCE MAINTENANCE 10. Close the right outer brush door. 11. Open the left outer brush door and repeat the procedure for the left brush. NOTE: The center brush can only be accessed from the right side of the machine. REPLACING DISK PADS FOR SAFETY: Before leaving or servicing machine, stop on level surface, set parking brake, turn off machine, and remove key. 1. Remove the pad driver from the machine. 2. Squeeze the spring clip together to remove the center disk. 3. Flip or replace the scrub pad, center the scrub pad on the pad driver. Then reinstall the center disk to secure the pad in place on the pad driver. CHECKING THE DISK SCRUB HEAD STOP BUMPERS The disk scrub head stop bumpers keep the scrub head parallel with the floor when in the raised position. This protects the brushes when transporting. Check the lift stop bumpers after every 100 hours of operation for wear or damage. 1. Raise the scrub head. FOR SAFETY: Before leaving or servicing machine, stop on level surface, set parking brake, turn off machine, and remove key. 2. Open the right and left outer brush doors. 3. Inspect the scrub head stop bumpers. Adjust the bumpers if the scrub head is not parallel with the floor. Replace worn or damaged bumpers. 4. Reinsert the pad driver into the machine. 48 T20 Service Information (5-2017) MAINTENANCE MAINTENANCE CYLINDRICAL BRUSHES 3. Open the inner brush doors. FOR SAFETY: Before leaving or servicing machine, stop on level surface, set parking brake, turn off machine, and remove key. Check the main brushes daily for tangled wire or string, wear, and damage. Replace the brushes when they no longer clean effectively. Rotate the brushes from front to rear after every 50 hours of machine operation for maximum brush life and best scrubbing performance. NOTE: Replace brushes in sets of two. Otherwise one scrub brush may scrub more aggressively than the other. 4. Remove the brush idler plates. REPLACING OR ROTATING CYLINDRICAL BRUSHES The front brush can be accessed on the left side of the machine and rear brush can be accessed on the right side of the machine. 1. Raise the scrub head. FOR SAFETY: Before leaving or servicing machine, stop on level surface, set parking brake, turn off machine, and remove key. 5. Pull the brushes out from the scrub head. 2. Open the outer brush doors. T20 Service Information (5-2017) 49 MAINTENANCE MAINTENANCE 6. Install the new or rotated brushes by pushing down on the ends while sliding them onto the drive motor hubs. CHECKING CYLINDRICAL BRUSH PATTERN 1. Apply chalk, or a similar marking material, to a smooth and level section of the floor. NOTE: If chalk or other material is not available, allow the brush to spin on the floor for two minutes. A polish mark will remain on the floor. 2. Raise the scrub head, then position the brushes over the chalked area. 3. Set the parking brake. 7. If rotating the brushes, always rotate the front with the back so that they wear evenly. They may be rotated endïforïend as well. A B B A 4. Press the 1ïSTEP Scrub button to lower the scrub head. Set the brush pressure to the lowest setting and allow the brushes to operate for 15 to 20 seconds. Keep the scrub head in one spot in the chalked area. 5. Raise the scrub head, release the parking brake, and drive the machine away from the chalked area. FOR SAFETY: Before leaving or servicing machine, stop on level surface, set parking brake, turn off machine, and remove key. 6. Observe the brush patterns. If the brush pattern is the same width across the entire length of each brush and both brushes are the same width, no adjustment is necessary. Before After 8. Reinstall the brush idler plates. 9. Close the inner and outer brush doors. 10. Check the brush pattern and adjust if needed after rotating them. Refer to CHECKING AND ADJUSTING THE MAIN BRUSH PATTERN. 11. Check the brush pattern and adjust if needed after rotating them. Refer to CHECKING CYLINDRICAL BRUSH PATTERN. 50 T20 Service Information (5-2017) MAINTENANCE MAINTENANCE 7. If the brush patterns are tapered, see ADJUSTING THE CYLINDRICAL BRUSH TAPER section of this manual. 8. The brush patterns should be 50 to 75 mm (2 to 3 in) wide with the brushes in the lowered position and both patterns should be the same width. If the width of the brushes is not the same, see ADJUSTING THE CYLINDRICAL BRUSH WIDTH section of this manual. ADJUSTING THE CYLINDRICAL BRUSH TAPER 1. Loosen the four mounting bolts on the brush drive housing. 2. Move the brush drive housing up to decrease the pattern width on that side of the scrub head or down to increase the pattern width on that side of the scrub head. 3. Tighten the mounting bolts. 4. Recheck the pattern. Readjust if necessary. ADJUSTING THE CYLINDRICAL BRUSH WIDTH 1. Adjust the length of the drag links on both sides of the scrub head. Lengthen the drag links to increase the rear brush pattern width. Shorten the drag links to increase the front brush pattern. Always adjust the nut on each drag link an equal number of turns. NOTE: Two full turns of the drag link adjustment bolt will change the brush pattern approximately 25 mm (1 in). 2. Recheck the pattern. Readjust if necessary. T20 Service Information (5-2017) 51 MAINTENANCE MAINTENANCE SIDE BRUSH (OPTION) 4. Remove the side brush from underneath the side brush assembly. FOR SAFETY: Before leaving or servicing machine, stop on level surface, set parking brake, turn off machine, and remove key. Check the side brush daily for wear or damage. Remove any tangled string or wire from the side brush or side brush drive hub. REPLACING THE SIDE BRUSH Replace the brush when it no longer cleans effectively or when the bristles are worn down to the yellow indicators. 5. Set the brush spring open on the new brush to make installation easier. 1. If necessary, raise the side brush. 2. Turn the brush until the spring handles are visible through the access hole in the side brush assembly. 3. Squeeze the spring handles and let the side brush drop to the floor. 52 6. Place the new side brush underneath the side brush assembly and lift the side brush up onto the side brush hub until the brush locks onto the hub. T20 Service Information (5-2017) MAINTENANCE MAINTENANCE FaST SYSTEM REPLACING THE FaSTïPAK CARTON FOR SAFETY: Before leaving or servicing machine, stop on level surface, set parking brake, turn off machine, and remove key. 1. Open the side access door. 2. Slide the seat completely forward. 3. Squeeze the button on the FaST supply hose connector, then pull the empty FaSTïPAK carton out from the compartment and discard. 4. Remove the perforated knock outs from the new FaSTïPAK carton. Do Not remove the bag from the carton. Pull out the hose connector located on the bottom of the bag and remove the hose cap from the connector. NOTE: The FaSTïPAK Floor Cleaning Concentrate is specially designed for use with the FaST system scrubbing application. NEVER use a substitute. Other cleaning solutions may cause FaST system failure. 5. Slide the FaSTïPAK carton into the FaSTïPAK bracket. 6. Connect the FaST supply hose to the FaSTïPAK hose connector. 7. Scrub with the FaST system for a few minutes to allow the detergent to reach maximum foaming. T20 Service Information (5-2017) 53 MAINTENANCE MAINTENANCE CLEANING THE FaST SUPPLY HOSE CONNECTOR Soak the connector in warm water if detergent buildup is visible. When a FaSTïPAK carton is not installed, store the supply hose connector on the storing plug to prevent the hose from clogging. REPLACING THE FaST SYSTEM FILTERS Replace the FaST system filters after every 1000 hours of operation. Empty the solution tank before replacing the filters. CLEANING THE FaST SYSTEM FILTER SCREEN The FaST system filter screen filters water from the solution tank as the water flows into the FaST system. Remove the filter screen bowl and clean the filter screen after every 50 hours of operation. Empty the solution tank before removing the filter. 54 T20 Service Information (5-2017) MAINTENANCE MAINTENANCE ecïH2O MODULE FLUSH PROCEDURE This procedure is only required when an alarm sounds and the ecïH2O system indicator light begins to blink red. 5. Place the ecïH2O system intake hose into a container containing 5 gallons (19 liters) of white or rice vinegar. Place the outlet hose into an empty bucket. FOR SAFETY: Before leaving or servicing machine, stop on level surface, set parking brake, turn off machine. 1. Remove both flush hoses from the storage bag located behind the operator seat. 2. Lock the operator seat cover open. 3. Disconnect the ecïH2O system intake hose from the solution supply hose and connect the intake flush hose (gray connector) to the ecïH2O system intake hose. 6. Turn the key to the on position without starting the engine. 7. Press and release the ecïH2O module flush switch to start the flush cycle. 4. Disconnect the ecïH2O system outlet hose from the hose to the scrub head and connect the outlet flush hose (black connector) to the ecïH2O system outlet hose. T20 Service Information (5-2017) NOTE: The module will automatically shut off when the flush cycle is complete (approx. 7 minutes). The module must run the full 7 minute cycle in order to reset the system indicator light and alarm. 55 MAINTENANCE MAINTENANCE 8. After the 7 minute flush cycle, remove the siphon hose from the container of vinegar and place the siphon hose into a container of cool clean water. Press the flush switch again to rinse out any remaining vinegar from the module. After 1ï2 minutes, press the flush switch to turn off the module. CLEANING THE ecïH2O FILTER SCREEN Remove and clean the ecïH2O filter screen after every 50 hours of operation. 9. Disconnect the flush hoses from the ecïH2O system intake hose and outlet hose and return the flush hoses to the storage bag. 10. Reconnect ecïH2O intake and outlet hoses. If the ecïH2O system indicator light continues to flash, repeat the flush procedure. If the problem persists, contact an Authorized Service Center. 11. Insert the outlet and intake hoses between the ecïH2O assembly and the bracket. NOTE: The outlet and intake hoses must be down between the ecïH2O assembly and the bracket so they are not pinched or damaged when the operator seat cover is closed. 12. Close the operator seat cover. 56 T20 Service Information (5-2017) MAINTENANCE MAINTENANCE SQUEEGEE BLADES 6. Loosen the rear retaining band tension latch and open the retaining band. Check the squeegee blades for damage and wear daily. When the blades become worn, rotate the blades endïforïend or topïtoïbottom to a new wiping edge. Replace blades when all edges are worn. Check the deflection of the squeegee blades daily or when scrubbing a different type of surface. Check the leveling of the rear squeegee every 100 hours of operation. REPLACING (OR ROTATING) THE REAR SQUEEGEE BLADES 1. Lower the scrub head. FOR SAFETY: Before leaving or servicing machine, stop on level surface, set parking brake, and turn off machine. 2. Disconnect the vacuum hose from the rear squeegee assembly. 7. Remove the rear squeegee. 3. Remove both mounting knobs from the rear squeegee assembly. 4. Turn on the machine, raise the scrub head, and turn off the machine. 5. Remove the rear squeegee assembly from the machine. T20 Service Information (5-2017) 57 MAINTENANCE MAINTENANCE 8. Install the new rear squeegee blade or rotate the existing blade to the new edge. Be sure all the holes in the squeegee blade are hooked onto the tabs. 11. Loosen the front retaining band tension latch and open the retaining band. 12. Remove the front squeegee. 9. Reinstall the rear retaining band aligning the tabs with the holes. 10. Tighten the rear retaining band tension latch. 58 13. Install the new front squeegee blade or rotate the existing blade to the new edge. Be sure the holes in the squeegee blade are hooked onto the tabs. T20 Service Information (5-2017) MAINTENANCE MAINTENANCE 14. Reinstall the front retaining band aligning the tabs with the notches. REPLACING OR ROTATING THE SIDE SQUEEGEE BLADES 1. If necessary, raise the scrub head. FOR SAFETY: Before leaving or servicing machine, stop on level surface, set parking brake, turn off machine, and remove key. 2. Open the outer brush doors. 3. Unhook the latch on the side squeegee retaining band from the side squeegee assembly. 15. Tighten the front retaining band tension latch. 16. Reinstall the rear squeegee assembly onto the machine. 17. Check and adjust the rear squeegee if necessary. Refer to ADJUSTING THE REAR SQUEEGEE BLADE DEFLECTION and LEVELING THE REAR SQUEEGEE sections of this manual. 4. Remove the retaining band from the side squeegee assembly. T20 Service Information (5-2017) 59 MAINTENANCE MAINTENANCE 5. Remove the side squeegee blade. If the outer edge of the squeegee blade is not worn, rotate the squeegee blade with the blade from the other side of the machine. Discard the squeegee blade if both edges are worn. 8. Hook the latch on the side squeegee retaining band. 9. Close the outer brush door. 6. Install the new or rotated squeegee blades. 7. Reattach the side squeegee retaining band to the side squeegee assembly. 60 T20 Service Information (5-2017) MAINTENANCE MAINTENANCE REPLACING OR ADJUSTING THE SIDE BRUSH SQUEEGEE BLADE (OPTION) 4. Remove the squeegees, spacer, and retainer from the squeegee bumper. FOR SAFETY: Before leaving or servicing machine, stop on level surface, set parking brake, turn off machine, and remove key. Check the side brush squeegee blade for damage and wear daily. Replace the blade if the leading edge is torn or worn half-way through the thickness of the blade. 1. Lower the scrub head. 2. Pull the pins and remove the squeegee bumper. NOTE: The side brush squeegee blades have different holes for changing height adjustment. 5. Reinstall the squeegees, spacer, and retainer to the squeegee bumper by aligning the appropriate holes to the pins on the bumper. 3. Open the retaining band tension latch. 6. Reinstall the retaining band tension latch. 7. Reinstall the squeegee bumper and reinsert the pins. T20 Service Information (5-2017) 61 MAINTENANCE MAINTENANCE LEVELING THE REAR SQUEEGEE Leveling the squeegee assures the entire length of the squeegee blade is in even contact with the surface being scrubbed. Perform this adjustment on an even and level floor. 1. Lower the squeegee and drive the machine forward a few meters (feet). FOR SAFETY: Before leaving or servicing machine, stop on level surface, set parking brake, turn off machine, and remove key. 2. Look at the deflection of the squeegee over the full length of the squeegee blade. 3. If the deflection is not the same over the full length of the blade, turn the squeegee levelling nut to make adjustments. DO NOT disconnect the suction hose from the squeegee frame when leveling squeegee. 4. Turn the squeegee leveling nut counter-clockwise to decrease the deflection at the ends of the squeegee blade. Turn the squeegee leveling nut clockwise to increase the deflection at the ends of the squeegee blade. 5. Drive the machine forward with the squeegee down to recheck the squeegee blade deflection if adjustments were made. 6. Readjust the squeegee blade deflection if necessary. 62 T20 Service Information (5-2017) MAINTENANCE MAINTENANCE ADJUSTING THE REAR SQUEEGEE BLADE DEFLECTION Deflection is the amount of curl the overall squeegee blade has when the machine moves forward. The best deflection is when the squeegee wipes the floor dry with a minimal amount of deflection. 3. To adjust the overall squeegee blade deflection, turn the adjustment knobs counterclockwise to increase deflection or clockwise to decrease deflection. NOTE: Make sure the squeegee is level before adjusting the deflection. See LEVELING THE REAR SQUEEGEE. 1. Lower the squeegee and drive the machine forward a few meters (feet). FOR SAFETY: Before leaving or servicing machine, stop on level surface, set parking brake, turn off machine, and remove key. 2. Look at the amount of deflection or “curl” of the squeegee blade. The correct amount of deflection is 12 mm (0.50 in) for scrubbing smooth floors and 15 mm (0.62 in) for rough floors. 4. Drive the machine forward again to recheck the squeegee blade deflection after adjustments are made. 5. Readjust the squeegee blade deflection if necessary. 12 mm (0.50 in) T20 Service Information (5-2017) 63 MAINTENANCE MAINTENANCE SKIRTS AND SEALS FOR SAFETY: Before leaving or servicing machine, stop on level surface, set parking brake, turn off machine, and remove key. SOLUTION TANK SEALS Check each solution tank cover seal for damage and wear daily. SCRUB HEAD SKIRT Check the skirt for damage and wear after every 100 hours of operation. The skirts should be between 0 to 6 mm (0 to 0.25 in) from the floor when the scrub head is down. RECOVERY TANK SEAL Check the recovery tank cover seal for damage and wear daily. 64 T20 Service Information (5-2017) MAINTENANCE MAINTENANCE BRAKES AND TIRES PROPELLING MOTOR BRAKES Torque the shaft nut to 508 Nm (375 ft lb) lubricated, 644 Nm (475 ft lb) dry, after every 800 hours of operation. The mechanical brakes are located on the rear wheels. The brakes are operated by the foot brake pedal and connecting cables. Check the brake adjustment after every 200 hours of operation. To check the brake adjustment, measure the distance from the stationary brake pedal to the point where there is resistance in the pedal movement. The distance must be between 6 mm (0.25 in) and 19 mm (0.75 in). Adjust the brakes if required. TIRES Check tires for damage and wear after every 100 hours of operation. FRONT WHEEL Torque the front wheel nuts twice in the pattern shown to 122 to 149 Nm (90 to 110 ft lb) after the first 50 hours of operation, and after every 800 hours there after. 4 2 5 1 3 T20 Service Information (5-2017) 65 MAINTENANCE MAINTENANCE PUSHING, TOWING, AND TRANSPORTING THE MACHINE PUSHING OR TOWING THE MACHINE If the machine becomes disabled, it can be pushed from the front or rear, but only towed from the front. The propelling pump has a bypass valve to prevent damage to the hydraulic system when the machine is being pushed or towed. This valve allows a disabled machine to be moved for a very short distance and at a speed to not exceed 1.6 kp/h (1 mph). The machine is NOT intended to be pushed or towed a long distance or at a high speed. ATTENTION! Do not push or tow machine for a long distance or damage may occur to the propelling system. TRANSPORTING THE MACHINE 1. Raise the squeegee, scrub head, and brushes. FOR SAFETY: When loading machine onto truck or trailer, drain tanks before loading machine. 2. Position the rear of the machine at the loading edge of the truck or trailer. 3. If the loading surface is not horizontal or is higher than 380 mm (15 in) from the ground, use a winch to load machine. If the loading surface is horizontal and 380 mm (15 in) or less from the ground, the machine may be driven onto the truck or trailer. Turn the bypass valve located on the bottom of the propelling pump 90 (either direction) from the normal position before pushing or towing the machine. Return the bypass valve back to the normal position when through pushing or towing the machine. Do Not use the bypass valve during normal machine operation. FOR SAFETY: When loading machine onto truck or trailer, use winch. Do not drive the machine onto the truck or trailer unless the loading surface is horizontal AND is 380 mm (15 in) or less from the ground. 4. To winch the machine onto the truck or trailer, attach the winching chains to the holes in the rear jacking brackets behind the rear tires. 66 T20 Service Information (5-2017) MAINTENANCE MAINTENANCE 5. Position the machine as close to the front of the trailer or truck as possible. 6. Set the parking brake and place a block behind each wheel to prevent the machine from rolling. 7. Lower the scrub head. 9. Route the tieïdowns to the opposite ends of the machine and hook them to the brackets on the floor of the trailer or truck. Tighten the tieïdown straps. NOTE: It may be necessary to install tie-down brackets to the floor of the trailer or truck. FOR SAFETY: When loading/unloading machine onto/off truck or trailer, lower scrub head and squeegee before tying down machine. 8. Connect the tieïdown straps to the holes in the right and left lower corners in front of the machine and the holes in the rear jacking brackets behind the rear tires. 10. If the loading surface is not horizontal or is higher than 380 mm (15 in) from the ground, use a winch to unload machine. If the loading surface is horizontal AND is 380 mm (15 in) or less from the ground, the machine may be driven off the truck or trailer. FOR SAFETY: When unloading machine off truck or trailer, use winch. Do not drive the machine off the truck or trailer unless the loading surface is horizontal AND 380 mm (15 in) or less from the ground. T20 Service Information (5-2017) 67 MAINTENANCE MAINTENANCE MACHINE JACKING STORAGE INFORMATION Empty the debris tray, recovery tank, and solution tank before jacking up the machine. Jack up the machine at the designated locations. Use a hoist or jack capable of supporting the weight of the machine. Use jackstands to support the machine. Always stop the machine on a flat, level surface and block the tires before jacking up the machine. The following steps should be taken prior to storing the machine for extended periods. Rear jacking locations are located directly behind the rear tires on each side of the machine. 1. Drain and clean the solution and recovery tanks. Open the recovery tank and solution tank covers to allow the air to circulate. 2. Park the machine in a cool, dry area. Do not expose the machine to rain. Store indoors. 3. Remove the battery, or charge battery every three months. Front jacking locations are located on the frame directly in front of the front tire. FOR SAFETY: Before leaving or servicing machine, stop on level surface, set parking brake, turn off machine, and remove key. FOR SAFETY: When servicing machine, block machine tires before jacking machine up. Use a hoist or jack that will support the weight of the machine. Jack machine up at designated locations only. Support machine with jack stands. 68 T20 Service Information (5-2017) MAINTENANCE MAINTENANCE FREEZE PROTECTION (MACHINES WITHOUT ecïH2O SYSTEM) FREEZE PROTECTION (MACHINES WITH ecïH2O SYSTEM) FOR SAFETY: Before leaving or servicing machine, stop on level surface, set parking brake, and turn off machine. FOR SAFETY: Before leaving or servicing machine, stop on level surface, set parking brake, and turn off machine. 1. Be sure the solution tank and recovery tank are empty. 2. Pour 3.8 L (1 gal) of Propylene Glycol Based / Recreational Vehicle (RV) Antifreeze into the solution tank. 3. Turn the key to the on position (without starting the machine). 1. Empty the solution tank and recovery tank. 2. Remove the intake flush hose and from the storage bag behind the operator seat. 3. Disconnect the ecïH2O system intake hose from the solution supply hose and connect the intake flush hose (gray connector) to the ecïH2O system intake hose. 4. Press the scrubbing main brush button. 5. Press the 1ïSTEP button. 6. Repeatedly press the Solution increase button (+) until the solution flow is at the highest setting. 7. Press the directional pedal to circulate the RV antifreeze completely through the system. 8. Press the 1ïSTEP Scrub button to turn off the system. 9. Machines equipped with the optional spray nozzle only: Turn on the pump until RV antifreeze solution sprays from the nozzle. 10. Turn the key to the off position. 4. Pull the drain tube from the between the ecïH2O unit and the operator compartment, remove the cap from the tube, and place the end of the tube into an empty container. Set the cap aside. 11. The remaining RV antifreeze does not need to be drained from the solution tank. NOTE: Storing or transporting machines equipped with the ES or the FaST system in freezing temperatures requires special procedures. Consult a TENNANT representative for more information. T20 Service Information (5-2017) 69 MAINTENANCE MAINTENANCE 5. Turn the key to the on position (without starting the machine). 6. Press and release the ecïH2O module flush switch. Allow the system to drain water into the container for 2 minutes. 7. Press the ecïH2O module flush switch to shut off the system. 8. Disconnect the ecïH2O system outlet hose from the hose to the scrub head. 9. Blow pressurized air (less than 344 kPa (50 psi)) into the ecïH2O system outlet hose. Continue blowing compressed air into the outlet hose until water no longer drains from the drain tube 10. Reinstall the cap onto the drain tube and insert the tube back between the ecïH2O module and the operator compartment. 11. Reconnect the ecïH2O system intake hose to the solution supply hose and the ecïH2O system outlet hose to the hose to the scrub head. 12. Insert the intake and outlet hoses down between the ecïH2O assembly and the bracket. 13. Return the intake flush hose to the storage bag behind the operator seat. 70 T20 Service Information (5-2017) MAINTENANCE MAINTENANCE PRIMING THE ecïH2O SYSTEM Prime the ecïH2O system if the machine has been stored for a long period without water in the solution tank / ecïH2O system. FOR SAFETY: Before leaving or servicing machine, stop on level surface, set parking brake, and turn off machine. 1. Fill the solution tank with clean cool water. See FILLING THE SOLUTION TANK section of this manual. 2. Remove the outlet flush hose (black connector) from the storage bag behind the operator seat. 3. Disconnect the ecïH2O system outlet hose from the hose to the scrub head and connect the outlet flush hose to the ecïH2O system outlet hose. 4. Place the ecïH2O system outlet hose into an empty container. 5. Turn the key to the on position (without starting the machine). 6. Press and release the ecïH2O module flush switch. Allow the system to drain water into the container for 2 minutes. 7. Press the ecïH2O module flush switch to shut off the system. 8. Disconnect the outlet flush hose from the ecïH2O system outlet hose and return the flush hose to the storage bag. 9. Reconnect the ecïH2O system outlet hose to the hose to the scrub head. T20 Service Information (5-2017) 71 ELECTRICAL TROUBLESHOOTING ELECTRICAL TROUBLESHOOTING T20 ELECTRICAL Troubleshooting Information BEFORE CONDUCTING TESTS: E *Read and Follow ALL Safety Warnings and Precautions as mentioned at the beginning of this manual. *Always use an ESD (Electrostatic Discharge) strap when working near the Control Board. *Be cautious when working near Control Board – Battery voltage is always present, even with Key OFF. * Always dis-connect Battery when removing or replacing components. DURING TESTS: * Call Technical Services if Diagnostic Time Exceeds One Hour With Unknown Cause or Course of Action. NOTE: Troubleshooting charts may be shown with optional equipment. The optional equipment may not be specified in these charts. Some machines may not be equipped with all components shown. 72 T20 Service Information (5-2017) ELECTRICAL TROUBLESHOOTING Schematic Symbols Used In This Manual + OFF Wires Connected Together Plug-in Connection Wires Not Connected Together Normally Open Switch Battery Normally Open Temperature Switch Normally Open Momentary Switch M2A Normally Open Normally Open Liquid Level Switch Pressure Switch Relay Coil with spike suppression resistor Open Closed Relay Contacts i E Lamp (Light Bulb) Horn or Sensor Alarm (Variable Resistor) Component in Position Other than Normal Diode Motor Solenoid Valve ! LED Information Information Battery Positive Box or Positive Output Fuse Battery Negative or Logic Ground Warning! Component is Energized Movement from Normal Position Assembly PIN P2-11 PIN P2-35 Control Board Output Control Board Input Connection TO or FROM Another Point Terms & Abbreviations ECM – Engine Control Module LED – Light Emitting Diode MIL – Malfunction Indicator Lamp PWM – Pulse Width Modulation (A method of using controlled on/off times to regulate the voltage and current supplied to an electrical device) SV – Solenoid Valve SW – Switch Example of Wiring Numbers & Colors: Wiring Color Codes (Unless otherwise marked) Right Most Digit of WireNumber Color of Wire 0 Tan 1 Pink 2 Brown 3 Orange 4 Yellow 5 Green 6 Blue 7 Purple 8 9 Gray White T20 Service Information (5-2017) 1 RED 25 7 13 BLK 73 ELECTRICAL TROUBLESHOOTING STANDARD PARTS MACHINE ELECTRICAL SCHEMATIC Fig. 61 − Electrical Schematic 1 2 3 1075421 − 356681 − T20 2‐124 74 Home Find... Go To.. T20 Gas/LPG 9016201 (12−2016) T20 Service Information (5-2017) STANDARD PARTS ELECTRICAL TROUBLESHOOTING Fig. 61 − Electrical Schematic MACHINE ELECTRICAL SCHEMATIC (CONTINUED) 1 2 3 1075421 − 356681 − T20 T20 Gas/LPG 9016201 (8−2016) Home T20 Service Information (5-2017) 2‐125 Find... Go To.. 75 ELECTRICALPARTS TROUBLESHOOTING STANDARD Fig. 61 − Electrical Schematic MACHINE ELECTRICAL SCHEMATIC (CONTINUED) 4 5 1075421 − 356681 − T20 2‐126 76 T20 Gas/LPG 9016201 (8−2016) Home Find... Go To.. T20 Service Information (5-2017) STANDARD PARTS ELECTRICAL TROUBLESHOOTING Fig. 61 − Electrical Schematic MACHINE ELECTRICAL SCHEMATIC (CONTINUED) 4 5 1075421 − 356681 − T20 T20 Gas/LPG 9016201 (8−2016) T20 Service InformationHome (5-2017) 2‐127 Find... Go To.. 77 ELECTRICALPARTS TROUBLESHOOTING STANDARD Fig. 61 − Electrical Schematic MACHINE ELECTRICAL SCHEMATIC (CONTINUED) 1075421 − 356681 − T20 2‐128 78 T20 Gas/LPG 9016201 (8−2016) Home Find... Go To.. T20 Service Information (5-2017) STANDARD PARTS ELECTRICAL TROUBLESHOOTING Fig. 61 − Electrical Schematic MACHINE ELECTRICAL SCHEMATIC (CONTINUED) 1075420 − 356680 T20 Gas/LPG 9016201 (8−2016) Home T20 Service Information (5-2017) 2‐129 Find... Go To.. 79 ELECTRICAL TROUBLESHOOTING NDARD PARTS MACHINE ELECTRICAL SCHEMATIC (CONTINUED) Fig. 61 − Mitsubishi Electrical Schematic 1075421 − 356681 − T20 80 T20 Gas/LPG 9016201 (8−2016) Home Find... Go To.. T20 Service Information (5-2017) ELECTRICAL TROUBLESHOOTING DIESEL ENGINE HARNESS ELECTRICAL SCHEMATIC STANDARD PARTS Fig. 57 − Electrical Schematic 1075420 − 356680 T20 Service Information (5-2017) 81 ELECTRICAL TROUBLESHOOTING GAS ENGINE HARNESS ELECTRICAL SCHEMATIC (MITSUBISHI) STANDARD PARTS Fig. 62 − Mitsubishi Electrical Schematic, Gas Engine Harness 1071653− 356303 82 T20 Service Information (5-2017) ELECTRICAL TROUBLESHOOTING STANDARD PARTS GAS ENGINE HARNESS ELECTRICAL SCHEMATIC (MITSUBISHI) (CONTINUED) Fig. 62 − Mitsubishi Electrical Schematic, Gas Engine Harness 1071653− 356303 T20 Gas/LPG 9016201 (8−2016) T20 Service Information (5-2017) Home Find... Go To.. 2‐133 83 ELECTRICAL TROUBLESHOOTING LPG ENGINE HARNESS ELECTRICAL SCHEMATIC (MITSUBISHI) STANDARD PARTS Fig. 63 − Mitsubishi Electrical Schematic, LPG Engine Harness 1071654− 356304 84 T20 Service Information (5-2017) ELECTRICAL TROUBLESHOOTING STANDARD PARTS LPG ENGINE HARNESS ELECTRICAL SCHEMATIC (MITSUBISHI) (CONTINUED) Fig. 63 − Mitsubishi Electrical Schematic, LPG Engine Harness 1071654− 356304 T20 Gas/LPG (8−2016)(5-2017) T20 Service9016201 Information Home Find... Go To.. 2‐135 85 ELECTRICAL TROUBLESHOOTING 86 T20 Service Information (5-2017) ELECTRICAL TROUBLESHOOTING T20 Option Components The following chart lists various options and the electrical and/or hydraulic components that are associated with the option. Refer to the “notes” section for any components that are deleted from a standard machine in order to have the installed option. Hose Spray ES (Extended Scrub) Side Brush option added components E or H component # Side Brush ON Solenoid Valve E,H SV-8 Side Brush Pressure Solenoid Valve E,H SV-10 Side Brush Down Solenoid Valve E,H SV-11 Side Brush Extend Solenoid Valve E,H SV-12 FaST Side Brush Valve E SOL-6 Side Brush Water Valve E SOL-7 Side Brush Manifold H x Side Brush Lift Cylinder H x Side Brush Extend Cylinder H x Side Brush Motor H x Solution Tank Auto Fill Water Valve E SOL-1 Recovery Tank Auto Fill Water Valve E SOL-2 Solution Tank Full Switch E S-14 Recovery Tank Half Full Switch E S-16 Detergent Pump E x ES Pump E x Spray Hose Pump E x Spray Hose Relay E M12 Spray Hose Switch E S-25 notes E If machine has ES option, the following components will not be on the machine: FaST Water Pump, FaST Water Pump Relay (M11), FaST Detergent Pump, FaST Air Pump, FaST Enable Valve (SOL-4), FaST High Flow Valve (SOL-5), FaST Side Brush Valve (SOL-6) E = Electrical Component H = Hydraulic Component T20 Service Information (5-2017) 87 ELECTRICAL TROUBLESHOOTING T20 Key Switch Conditions: Glow Plug, Key Off, Run, Start Positions Off Glow Plug 30 Off Run Start 30 50 50 17 17 19 19 ACC ACC Glow Plug Position (Diesel Only) Spring Loaded – Returns to “Off” Unless Held E 50 Run Position Off Position Off Run Glow Plug 30 Start Key Switch Key Switch Off Run Glow Plug Glow Plug 30 Start Run Key Switch 50 17 17 19 19 ACC Start Position Start Key Switch ACC Spring Loaded‐Returns to “RUN” Unless Held SWITCH TERMINAL MARKING KEY SWITCH POSITION 30 88 17 19 ACC GLOW PLUG OFF NO CONNECTIONS RUN START “. i 50 “ Indicates a common connection Common connections in various switch positions should be less than one (1) ohm resistance. T20 Service Information (5-2017) ELECTRICAL TROUBLESHOOTING T20 Key OFF Power Distribution Conditions: Key off 12 VDC + 1/RED - 13/BLK ALTERNATOR 1/RED + GREEN JUMPER WIRE - 1/RED 30 Touch Panel / Control Board 13/BLK PIN P2-33 50 17 19 ACC 13/BLK PIN P2-34 13/BLK PIN P2-35 KEY SWITCH OFF PIN P1-23 FUSE 10 1/RED 15 AMP ! i 81 81 105 STATIC GROUND E PIN P2-3 Be cautious when working near Control Board Battery voltage is always present, even with Key OFF Pin P2-3 supplies power to the on-board clock only. Disconnecting battery, removing Fuse 10, or removing connector P2 from Control Board will require the clock to be reset. Wiring Color Codes (Unless otherwise marked) Right Most Digit of Wire Number Color of Wire 0 Tan 1 Pink 2 Brown 3 Orange 4 Yellow 5 Green 6 Blue 7 Purple 8 Gray 9 White T20 Service Information (5-2017) 89 ELECTRICAL TROUBLESHOOTING T20 Key ON Power Distribution Conditions: Key on, engine off 12 VDC + 1/RED - 13/BLK ALTERNATOR 1/RED + GREEN JUMPER WIRE - 1/RED 30 ALTERNATOR LAMP 50 17 19 4 8 86 ACC15 AMP KEY SWITCH RUN 4 TO FUSES 9 &12 1/RED E FUSE 1 8 7 M1A 85 13/BLK 13/BLK Touch Panel / Control Board AUX. 1 RELAY 1/RED 30 87 FUSE 5 6 14 15 AMP 14 M1B 1/RED 14 D-2 3 14 14 6 8 SHUTDOWN RELAY CONTACTS (Normally CLOSED) 8 8 86 M2A 85 TO FUSE 6 13/BLK PIN P2-33 PIN P2-1 PIN P2-2 PIN P2-34 PIN P2-35 PIN P1-23 13/BLK 13/BLK 13/BLK 105 STATIC GROUND 13/BLK M6C 3 AUX. 2 RELAY TO ENGINE HARNESS 1/RED 30 1/RED M2B 87 5 TO FUSES 7&8 Wiring Color Codes (Unless otherwise marked) 90 Right Most Digit of Wire Number Color of Wire 0 Tan 1 Pink 2 Brown 3 Orange 4 Yellow 5 Green 6 Blue 7 Purple 8 Gray 9 White T20 Service Information (5-2017) ELECTRICAL TROUBLESHOOTING T20 Main Brushes ON Conditions: Key on, engine running, scrubbing or sweeping system on, propel forward or reverse Maximum Amp. Draw Readings BATTERY POSITIVE FROM AUX 1 RELAY CONTACTS 6 FUSE 6 Component Max Amp Draw SV-3 1.7 A SV-6 1.7 A SV-7 1.7 A 15 15 AMP 6 PWM 14 15 AMP 395 mA P3 490 mA BRUSH HEAD PRESSURE 57 MAIN BRUSHES LOWER 58 PIN P2-8 PIN P2-4 14 Setting SV-2 Amp Draw P2 61 SV-2 Typical Default Amp Draw Readings (+/- 15%) 285 mA ENABLE VALVE SV-7 FUSE 5 P1 Touch Panel / Control Board PIN P2-5 SV-3 E 14 MAIN BRUSHES ROTATE 58 SV-6 i Pressure settings P1, P2, & P3 are the Touch Panel LED indicators for Brush down pressure. Wiring Color Codes (Unless otherwise marked) Right Most Digit of Wire Number Color of Wire 0 Tan 1 Pink 2 Brown 3 Orange 4 Yellow 5 Green 6 Blue 7 Purple 8 Gray 9 White T20 Service Information (5-2017) i SV-2 is controlled by PWM; a higher duty cycle (more Brush Pressure LED’s lit on Touch Panel) will result in more brush down pressure. 91 ELECTRICAL TROUBLESHOOTING T20 Scrub Vacuum Fan ON & Squeegees DOWN Conditions: Key ON, Engine Running, Scrubbing System & Scrub Vacuum On, Propelling Forward Maximum Amp Draw Readings BATTERY POSITIVE FROM AUX 1 RELAY CONTACTS Component Max Amp Draw SV-1 1.7 A SV-4 1.7 A SV-7 1.7 A Touch Panel / Control Board 6 FUSE 6 ENABLE VALVE 15 15 AMP E 6 FUSE 5 61 PIN P2-8 SV-7 SCRUB VACUUM FAN ON 56 14 15 AMP PIN P2-28 SV-1 14 SIDE & REAR SQUEEGEES LOWER 59 PIN P2-6 SV-4 i 92 Right Most Digit of Wire Number Color of Wire 0 Tan 1 Pink 2 Brown 3 Orange 4 Yellow 5 Green 6 Blue 7 Purple 8 Gray 9 White i Reverse propel will turn OFF SV-4 (Pin P2-6) and raise the side and rear squeegees. Any condition that cancels the scrub functions will also turn OFF the scrub vacuum fan and raise squeegees. T20 Service Information (5-2017) ELECTRICAL TROUBLESHOOTING T20 Side Brush ON Conditions: Key ON, Engine Running, Scrubbing System & Scrub Vacuum On, Propelling Forward or Back Maximum Amp Draw Readings Component Max Amp Draw SV-7 1.7 A SV-8 1.7 A SV-11 1.7 A SV-12 1.7 A BATTERY POSITIVE FROM AUX 1 RELAY CONTACTS FUSE 6 6 ENABLE VALVE 15 15 Typical Default Amp Draw Readings (+/- 15%) 530 mA 625 mA P3 715 mA SV-7 PWM SIDE BRUSH PRESSURE 64 PIN P2-11 SV-10 Setting SV-10 Amp Draw P2 61 PIN P2-8 15 AMP P1 Touch Panel / Control Board 15 SIDE BRUSH DOWN 66 PIN P2-12 SV-11 15 SIDE BRUSH EXTEND 15 Wiring Color Codes Color of Wire 0 Tan 1 Pink 2 Brown 3 Orange 4 Yellow 5 Green 6 Blue 7 Purple 8 Gray 9 White T20 Service Information (5-2017) PIN P2-9 SV-12 SIDE BRUSH RUN (Unless otherwise marked) Right Most Digit of Wire Number 62 E 62 SV-8 i i Pressure settings P1, P2, & P3 are the Touch Panel LED indicators for Brush Down Pressure. SV-10 is controlled by PWM; a higher duty cycle (more Brush Pressure LED’s lit on Touch Panel) will result in more Brush Down pressure. 93 ELECTRICAL TROUBLESHOOTING T20 Tank Level Switches Conditions: Key ON BATTERY NEGATIVE Touch Panel / Control Board PIN P1-11 SOLUTION TANK EMPTY SWITCH 177 13/BLK S-19 OPEN = EMPTY CLOSED = NOT EMPTY PIN P1-12 44 SOLUTION TANK FULL SWITCH S-14 OPEN = NOT FULL CLOSED = FULL Wiring Color Codes (Unless otherwise marked) Right Most Digit of Wire Number E RECOVERY TANK FULL SWITCH Color of Wire 0 Tan 1 Pink 2 Brown 3 Orange 4 Yellow 5 Green 6 Blue 7 Purple 8 Gray 9 White 13/BLK PIN P1-13 45 13/BLK S-15 OPEN = NOT FULL CLOSED = FULL PIN P1-14 46 RECOVERY TANK HALF FULL SWITCH 13/BLK S-16 OPEN = LESS THAN HALF FULL CLOSED = HALF FULL OR MORE i 94 S-14, SA-15, & S-19 are Float Switches. S-16 is a Pressure Tube Switch. i The Tank Level Switches must be closed for five (5) seconds before any output is affected. T20 Service Information (5-2017) ELECTRICAL TROUBLESHOOTING T20 Auto Fill Solenoids (ES Equipped Machines Only) Conditions: Key ON, Water Source Connected To Machine, Solution Tank NOT Full, Recovery Tank Less Than Half Full Maximum Amp Draw Readings BATTERY POSITIVE FROM AUX 2 RELAY CONTACTS Component Max Amp Draw SOL-1 1.7 A SOL-2 1.7 A BATTERY NEGATIVE Touch Panel / Control Board 5 FUSE 7 SOLUTION TANK AUTO FILL VALVE 16 15 AMP SOLUTION TANK EMPTY SWITCH PIN P1-11 65 PIN P2-13 177 13/BLK S-19 OPEN = EMPTY CLOSED = NOT EMPTY SOL-1 SOLUTION TANK FULL SWITCH 16 Wiring Color Codes PIN P1-12 RECOVERY TANK AUTO FILL VALVE (Unless otherwise marked) Right Most Digit of Wire Number Color of Wire 0 Tan 1 Pink 2 Brown 3 Orange 4 Yellow 5 Green 6 Blue 7 Purple 8 Gray 9 White 67 44 13/BLK S-14 OPEN = NOT FULL CLOSED = FULL PIN P2-14 RECOVERY TANK FULL SWITCH SOL-2 PIN P1-13 45 13/BLK S-15 E OPEN = NOT FULL CLOSED = FULL RECOVERY TANK HALF FULL SWITCH PIN P1-14 46 13/BLK S-16 OPEN = LESS THAN HALF FULL CLOSED = HALF FULL OR MORE i S-14, S-15, & S-19 are Float Switches.S-16 is a Pressure Tube Switch. i Solution and Recovery Tank Auto Fill solenoids (SOL-1 & 2) are electro-mechanical devices. i Machine must be in neutral and Solution Tank Full Switch OPEN (tank not full) to activate Solution Tank Auto Fill Valve (SOL-1).. i Machine must be in neutral and Recovery Tank Half Full Switch OPEN (tank less than half full) to activate Recovery Tank Auto Fill Valve (SOL-2). i The Tank Level Switch must be closed for five (5) seconds before any output is affected.. T20 Service Information (5-2017) 95 ELECTRICAL TROUBLESHOOTING T20 Conventional Detergent Pump & ES Pump Conditions: Key ON, Engine Running, Scrubbing System ON, Recovery Tank Half Full or More, Solution Tank Not Full, Two or Three Solution LED’s Lit. Maximum Amp Draw Readings BATTERY POSITIVE FROM AUX 2 RELAY CONTACTS Component Max Amp Draw Detergent Pump 1.7 A ES Pump n/a BATTERY NEGATIVE Touch Panel / Control Board PIN P1-11 SOLUTION TANK EMPTY SWITCH 177 DETERGENT PUMP 5 FUSE 8 17 S-19 74 17 OPEN = EMPTY CLOSED = NOT EMPTY PIN P2-21 PWM 15 AMP Wiring Color Codes SOLUTION TANK FULL SWITCH (Unless otherwise marked) E Color of Wire 0 Tan 1 Pink 2 Brown 3 Orange 4 Yellow 5 Green 6 Blue 7 Purple 8 Gray 9 White PIN P1-12 44 17 13/BLK S-14 ES PUMP OPEN = NOT FULL CLOSED = FULL 75 PIN P2-22 RECOVERY TANK FULL SWITCH PIN P1-13 45 13/BLK S-15 OPEN = NOT FULL CLOSED = FULL i S-14, S-15, & S-19 are Float Switches, S-16 is a Pressure Tube Switch i The Tank Level Switches must be closed for 5 seconds before any output is affected. i The Detergent Pump is controlled by PWM; A higher duty cycle (more Solution LED’s lit on Touch Panel) will result in more detergent & solution applied to floor i 96 Right Most Digit of Wire Number 13/BLK RECOVERY TANK HALF FULL SWITCH PIN P1-14 46 13/BLK S-16 OPEN = LESS THAN HALF FULL CLOSED = HALF FULL OR MORE The Recovery Tank must be at least half full for ES Pump to turn ON. This will begin a 30 second run cycle of the ES Pump. If the Recovery Tank is still at least half full after the cycle, another 30 second cycle will begin. If a full Solution Tank is sensed, the ES Pump will turn OFF before completing 30 second cycle. T20 Service Information (5-2017) ELECTRICAL TROUBLESHOOTING T20 Horn Conditions: Key on, switch activated UNSWITCHED BATTERY POSITIVE BATTERY NEGATIVE 1/RED FUSE 3 HORN M5B 25 30 87 13/BLK 23 15 AMP 23 D1 HORN RELAY 25 86 M5A 13/BLK 85 HORN SWITCH 13/BLK 92 S-22 OPEN = HORN OFF CLOSED = HORN ON Wiring Color Codes E (Unless otherwise marked) Right Most Digit of Wire Number Color of Wire 0 Tan 1 Pink 2 Brown 3 Orange 4 Yellow 5 Green 6 Blue 7 Purple 8 Gray 9 White Horn Location Membrane Panel Horn Location Pro Panel T20 Service Information (5-2017) 97 ELECTRICAL TROUBLESHOOTING T20 Reverse Propel Conditions: Key ON, Propel Pedal Pushed For Reverse Travel Maximum Amp Draw Readings BATTERY POSITIVE FROM AUX 2 RELAY CONTACTS Component Max Amp Draw M4A 200 mA BATTERY NEGATIVE Touch Panel / Control Board FUSE 7 5 16 86 15 AMP M4A 70 85 13/BLK PIN P2-17 i PIN P1-1 E REVERSE RELAY 87 M4B i Reverse propel will turn OFF SV-4 (Pin P2-6) and raise the side and rear squeegees. Wiring Color Codes (Unless otherwise marked) 98 Right Most Digit of Wire Number Color of Wire 0 Tan 1 Pink 2 Brown 3 Orange 4 Yellow 5 Green 6 Blue 7 Purple 8 Gray 9 White 20 SENSOR OUTPUT 131/BLKPROPEL WHT PEDAL POSITION DIGITAL 3 SENSOR 2 GROUND SENSOR OUTPUT VOLTAGES: 2.0 to 2.7 VDC = NEUTRAL 2.8 VDC OR HIGHER = REVERSE 1.9 VDC OR LOWER = FORWARD 14 BATTERY POSITIVE FROM FUSE 1 30 HIGHER IN REVERSE 91 1 BATTERY POSITIVE FROM FUSE 5 8 2.8 VDC OR REVERSE ALARM/ WARNING LIGHT 20 13/BLK REVERSE TAIL LIGHT 20 (RIGHT) 13/BLK REVERSE TAIL LIGHT 20 (LEFT) 13/BLK i See Forward Propel page for information on adjusting Propel Pedal Position Sensor T20 Service Information (5-2017) ELECTRICAL TROUBLESHOOTING T20 Shutdown Relay (Normal Machine Operation) (GAS / LPG) 12 VDC + 1/RED - 13/BLK Maximum Amp Draw Readings 1/RED Component Max Amp Draw M6A 200 mA AUXILIARY RELAY 4 4 KEY SWITCH 4 1/RED 13/BLK M1A TO FUSES 9 & 12 AUX. 1 RELAY CONTACTS M1B 8 15 AMP RUN 1/RED FUSE 1 8 8 6 13/BLK M2A TO FUSES 5 &6 ! 5 76 CONNECT FOR L.P.G. ONLY M2B 8 30 87a 3 3 Color of Wire 0 Tan 1 Pink 2 Brown 3 Orange 4 Yellow 5 Green 6 Blue 7 Purple 8 Gray 9 White T20 Service Information (5-2017) TAN/BRN TO ENGINE ECM 5 FUSE 7 16 15 AMP i 86 M6A 85 A PINK E TO FUSE 1 OF ENGINE HARNESS J-11 SHUTDOWN RELAY (Unless otherwise marked) D 10 PIN M6C OPEN = MACHINE SHUTDOWN CLOSED = NORMAL OPERATION Right Most Digit of Wire Number 8 PIN ENGINE HARNESS CONNECTORS AUX. 2 RELAY CONTACTS Wiring Color Codes Refer to the Engine Controller schematics J-12 AUXILIARY RELAY Touch Panel / Control Board 71 PIN P2-18 The Shutdown system is used to turn OFF the engine under certain conditions on machines with certain optional equipment i When control board turns ON M6A, the engine ECM loses power, and the engine shuts OFF 99 ELECTRICAL TROUBLESHOOTING T20 Shutdown Relay (Normal Machine Operation) (Diesel) 12 VDC + 1/RED - 13/BLK Maximum Amp Draw Readings 1/RED Component Max Amp Draw M6A 200 mA AUXILIARY RELAY 4 4 KEY SWITCH 4 E 1/RED 13/BLK M1A TO FUSES 9 & 12 AUX. 1 RELAY CONTACTS M1B 8 15 AMP RUN 1/RED FUSE 1 8 8 6 13/BLK M2A TO FUSES 5 &6 AUXILIARY RELAY 5 M2B AUX. 2 RELAY CONTACTS 8 30 87a 3 J-11 10 PIN M6C OPEN = MACHINE SHUTDOWN CLOSED = NORMAL OPERATION (Unless otherwise marked) 100 Right Most Digit of Wire Number Color of Wire 0 Tan 1 Pink 2 Brown 3 Orange 4 Yellow 5 Green 6 Blue 7 Purple 8 Gray 9 White 5 FUSE 7 15 AMP i 16 86 M6A 85 TO FUEL PUMP RELAY M10 ENGINE HARNESS CONNECTOR SHUTDOWN RELAY Wiring Color Codes 3 A Touch Panel / Control Board 71 PIN P2-18 The Shutdown system is used to turn OFF the engine under certain conditions on machines with certain optional equipment i When control board turns ON M6A, the engine ECM loses power, and engine shuts OFF T20 Service Information (5-2017) ELECTRICAL TROUBLESHOOTING T20 Shutdown Relay (Shutdown Mode) (GAS / LPG) 12 VDC + 1/RED - 13/BLK Maximum Amp Draw Readings 1/RED Component Max Amp Draw M6A 200 mA AUXILIARY RELAY 4 4 KEY SWITCH 4 1/RED 8 8 8 13/BLK M1A TO FUSES 9 & 12 AUX. 1 RELAY CONTACTS M1B 8 15 AMP RUN 1/RED FUSE 1 6 TO FUSES 5 &6 13/BLK M2A ! 5 CONNECT FOR L.P.G. ONLY 8 PIN 76 M2B 8 30 87a 3 3 Color of Wire 0 Tan 1 Pink 2 Brown 3 Orange 4 Yellow 5 Green 6 Blue 7 Purple 8 Gray 9 White T20 Service Information (5-2017) TO ENGINE ECM 5 FUSE 7 15 AMP i 16 86 M6A 85 A PINK E TO FUSE 1 OF ENGINE HARNESS J-11 SHUTDOWN RELAY (Unless otherwise marked) TAN/BRN 10 PIN M6C OPEN = MACHINE SHUTDOWN CLOSED = NORMAL OPERATION Right Most Digit of Wire Number D ENGINE HARNESS CONNECTORS AUX. 2 RELAY CONTACTS Wiring Color Codes Refer to the Engine Controller schematics J-12 AUXILIARY RELAY 71 Touch Panel / Control Board PIN P2-18 The Shutdown system is used to turn OFF the engine under certain conditions on machines with certain optional equipment i When control board turns ON M6A, the engine ECM loses power, and engine shuts OFF 101 ELECTRICAL TROUBLESHOOTING T20 Shutdown Relay (Shutdown Mode) (Diesel) 12 VDC + 1/RED - 13/BLK Maximum Amp Draw Readings 1/RED Component Max Amp Draw M6A 200 mA AUXILIARY RELAY 4 4 KEY SWITCH 4 E 1/RED 8 8 8 13/BLK M1A TO FUSES 9 & 12 AUX. 1 RELAY CONTACTS M1B 8 15 AMP RUN 1/RED FUSE 1 6 TO FUSES 5 &6 13/BLK M2A AUXILIARY RELAY 5 M2B AUX. 2 RELAY CONTACTS 8 30 87a 3 J-11 10 PIN M6C OPEN = MACHINE SHUTDOWN CLOSED = NORMAL OPERATION (Unless otherwise marked) 102 Right Most Digit of Wire Number Color of Wire 0 Tan 1 Pink 2 Brown 3 Orange 4 Yellow 5 Green 6 Blue 7 Purple 8 Gray 9 White 5 FUSE 7 15 AMP i 16 86 M6A 85 TO FUEL PUMP RELAY M10 ENGINE HARNESS CONNECTOR SHUTDOWN RELAY Wiring Color Codes 3 A 71 Touch Panel / Control Board PIN P2-18 The Shutdown system is used to turn OFF the engine under certain conditions on machines with certain optional equipment i When control board turns ON M6A, the engine ECM loses power, and engine shuts OFF T20 Service Information (5-2017) ELECTRICAL TROUBLESHOOTING T20 Starting System ON Conditions: Key Turned To Start Position (Gas – LPG) 12 VDC + 1/RED - 13/BLK ENGINE BLOCK 1/RED ENGINE LT.BLUE/PINK HARNESS CONNECTOR 1/RED 30 87 77 J-11 J STARTER MOTOR ASSEMBLY 30 87a ENGINE BLOCK 10 PIN M7B 87 PINK/BLK WHITE STARTER LOCKOUT RELAY 86 STARTER RELAY 85 Refer to the Engine Controller schematics GRAY/ORANGE FROM ECM PIN 9 E FROM FUSE 1 OF ENGINE HARNESS PINK/TAN PINK/BLK 2 86 M7A 85 J-11 10 PIN K ENGINE HARNESS CONNECTOR NO CONNECTION 13/BLK NO CONNECTION 4 KEY SWITCH TO FUSES 1, 9, & 12 START Wiring Color Codes (Unless otherwise marked) Right Most Digit of Wire Number Color of Wire 0 Tan 1 Pink 2 Brown 3 Orange 4 Yellow 5 Green 6 Blue 7 Purple 8 Gray 9 White T20 Service Information (5-2017) 103 ELECTRICAL TROUBLESHOOTING T20 Starting System ON Conditions: Key Turned To Start Position (Diesel) 12 VDC + 1/RED - 13/BLK ENGINE BLOCK 1/RED 1/RED 30 E 87 30 77 J-11 J 77 86 M8A 85 82 D-3 1/RED 86 M7A 30 KEY SWITCH 55 START Pink 2 Brown 3 Orange 4 Yellow 5 Green 6 Blue 7 Purple 8 Gray 9 White 56 3 56 87 3 86 M9A 85 13/BLK 13/BLK TO BATTERY NEGATIVE Tan 1 TO GLOWPLUGS 0 TO FUSES 1, 9, & 12 104 Color of Wire PIN 3 B+ STARTER LOCKOUT RELAY 4 Wiring Color Codes PIN 6 INIT M9B 42 (Unless otherwise marked) 13/BLK 85 13/BLK 55 Right Most Digit of Wire Number PIN 1 GND M9C 87a 2 PIN 2 LOAD STARTER TIMER MODULE 77 STARTER RELAY ENGINE BLOCK STARTER RELAY 10 PIN M7B 83 M8B ENGINE HARNESS CONNECTOR 1/RED 87 STARTER MOTOR ASSEMBLY SWITCHED BATTERY POSITIVE FROM SHUTDOWN RELAY M6C 3 J-11 A 3 3 10 PIN TO FUEL PUMP RELAY M10 & GOVERNOR ENGINE HARNESS CONNECTOR i The Starter Timer Module creates a delay between start attempts T20 Service Information (5-2017) ELECTRICAL TROUBLESHOOTING T20 Glow Plugs ON Conditions: Key Turned To Start Position / Glow Plug (Diesel) GLOW PLUGS GP1 42 GP2 42 GP3 42 GP4 START KEY SWITCH 1/RED TO START RELAY M7A 42 42 TO FUSES 1, 9, & 12 KEY SWITCH FROM BATTERY NEGATIVE RUN CH ASS IS GRO UNDS FROM BATTERY POSITIVE 42 OFF Glow Plug 13/BLK 42 GLOW PLUG LAMP GLOW PLUG GLOW PLUGS GP1 42 GP2 42 GP3 42 GP4 START KEY SWITCH 1/RED TO START RELAY M7A 42 KEY SWITCH 42 TO FUSES 1, 9, & 12 42 FROM BATTERY NEGATIVE RUN CH ASS IS GRO UNDS FROM BATTERY POSITIVE 42 OFF Glow Plug E 13/BLK GLOW PLUG LAMP START Wiring Color Codes (Unless otherwise marked) Right Most Digit of Wire Number Color of Wire 0 Tan 1 Pink 2 Brown 3 Orange 4 Yellow 5 Green 6 Blue 7 Purple 8 Gray 9 White T20 Service Information (5-2017) i The Glow Plugs are ON only when ignition switch is in the “Glow Plug” or “Start” position 105 ELECTRICAL TROUBLESHOOTING T20 Conventional Main & Side Brush Solution Valves Conditions: Key On, Scrubbing System On, Side Brush On, Forward or Reverse Propel, One or More Solution LED’s Lit. Maximum Amp Draw Readings BATTERY POSITIVE FROM AUX 2 RELAY CONTACTS Component Max Amp Draw SOL-3 1.7 A SOL-7 1.7 A Touch Panel / Control Board MAIN BRUSH SOLUTION VALVE FUSE 7 5 16 72 15 AMP PIN P2-19 SOL-3 16 181 E PIN P2-20 SOL-7 SIDE BRUSH SOLUTION VALVE i The Solution Valves are pulsed slowly to adjust the solution volume. Less OFF time (more Solution LED’s lit on Control Pad will result in more solution applied to floor i The Solution Valves will function only while propelling forward or reverse during scrub operation Wiring Color Codes (Unless otherwise marked) 106 Right Most Digit of Wire Number Color of Wire 0 Tan 1 Pink 2 Brown 3 Orange 4 Yellow 5 Green 6 Blue 7 Purple 8 Gray 9 White T20 Service Information (5-2017) ELECTRICAL TROUBLESHOOTING T20 FaST System ON Conditions: Key On, Scrubbing System On, Side Brush On, Forward or Reverse Propel, Three Solution LED’s Lit BATTERY POSITIVE FROM AUX 2 RELAY CONTACTS One or Two Solution LED’s lit selects LOW FaST output i 5 FUSE 8 17 15 AMP Component Max Amp Draw SOL-4 1.7 A SOL-5 1.7 A SOL-6 1.7 A M11A 200 mA FaST Det. Pump 1.7 A FaST Air Pump 1.7 A FaST Water Pressure Switch: OPEN = Less than 10 PSI Closed = More Than 10 PSI i The FaST Detergent Pump is controlled a by PWM: A higher duty cycle (more Solution LED’s lit on Control Pod), will result in more FaST foam applied i i FaST High Flow Valve is ON only when all three Solution LED’s are lit 17 FaST HIGH FLOW VALVE 79 FaST SIDE BRUSH VALVE 80 FaST WATER PRESSURE SWITCH FaST DETERGENT PUMP 83 PWM 17 17 PIN P2-23 SOL-5 SOL-6 17 Touch Panel / Control Board FaST ENABLE VALVE 75 PIN P2-26 74 PIN P2-21 75 E PIN P2-22 SOL-4 FaST AIR PUMP 75 75 17 75 17 86 M11A 85 75 BATTERY NEGATIVE Wiring Color Codes (Unless otherwise marked) Right Most Digit of Wire Number 0 Color of Wire Tan 1 Pink 2 Brown 3 Orange 4 Yellow 5 Green 6 Blue 7 Purple 8 Gray 9 White T20 Service Information (5-2017) 17 FaST WATER PUMP RELAY FaST WATER PUMP 86 30 87 13/BLK M11B 107 ELECTRICAL TROUBLESHOOTING T20 Fuel Level Sensors Conditions: Key On BATTERY NEGATIVE Touch Panel / Control Board Touch Panel / Control Board GAS / DIESEL PIN P1-4 13/BLK 30 LPG WHT S-7 DIGITAL GROUND FRONT FUEL PRESSURE SWITCH S-8 FUEL LEVEL SENDER 131/BLK- 100 OHMS = FULL TANK 5 OHMS = EMPTY TANK E BATTERY NEGATIVE PIN P1-4 30 S-8 13/BLK 131/BLKWHT DIGITAL GROUND NORMALLY CLOSED, HELD OPEN BY FUEL PRESSURE OPEN = MORE THAN 70 PSI CLOSED = 70 PSI OR LOWER Wiring Color Codes (Unless otherwise marked) 108 Right Most Digit of Wire Number Color of Wire 0 Tan 1 Pink 2 Brown 3 Orange 4 Yellow 5 Green 6 Blue 7 Purple 8 Gray 9 White T20 Service Information (5-2017) ELECTRICAL TROUBLESHOOTING T20 Impact, Hydraulic Temp & Filter Sensor Conditions: Key On BATTERY NEGATIVE Touch Panel / Control Board PIN P1-15 90 HYDRAULIC FILTER CLOGGED SWITCH 13/BLK S-17 OPEN = LESS THAN 20 PSI (FILTER OK) CLOSED = MORE THAN 20 PSI (FILTER CLOGGED) PIN P1-17 78 HYDRAULIC OIL TEMPERATURE SENSOR 131/BLK-WHT DIGITAL GROUND S-20 0.8 VDC OR LESS = 220°F OR HIGHER ABOVE 0.8 VDC = UNDER 220°F IMPACT SENSOR PIN P1-21 13/BLK 49 E S-23 OPEN = NO IMPACT DETECTED CLOSED = IMPACT DETECTED i Impact Sensor S-23 is used only on machines with certain optional equipment i The hydraulic Filter Clogged switch will not be sensed until after the machine has run for five minutes to allow the hydraulic oil to warm up Wiring Color Codes (Unless otherwise marked) Right Most Digit of Wire Number Color of Wire 0 Tan 1 Pink 2 Brown 3 Orange 4 Yellow 5 Green 6 Blue 7 Purple 8 Gray 9 White T20 Service Information (5-2017) FRONT 109 ELECTRICAL TROUBLESHOOTING T20 Engine Oil Pressure, Temperature, and MIL System (Gas / LPG) Engine Oil Pressure FROM AUX 1 RELAY CONTACTS Touch Panel / Control Board 6 FUSE 5 15 AMP 14 28 LOW ENGINE OIL PRESSURE LAMP Refer to the Engine Controller schematics J-12 PIN P2-27 8 PIN 9 PIN P1-19 A LT.BLUE/WHITE ENGINE HARNESS CONNECTOR E PIN P1-18 OPEN = LOW OIL PRESSURE BATTERY NEG.= OIL PRESSURE OK Engine Temperature Switch Touch Panel / Control Board 12 BATTERY NEGATIVE HIGH ENGINE TEMPERATURE SWITCH 12 OIL PRESSURE SIGNAL FROM ECM PIN 30 13/BLK SW2 OPEN = BELOW 220°F CLOSED = ABOVE 220°F J-12 12 8 PIN B TAN/DK.GREEN TO ECM PIN 35 Refer to the Engine Controller schematics ENGINE HARNESS CONNECTOR Wiring Color Codes (Unless otherwise marked) Right Most Digit of Wire Number 0 110 Malfunction Indicator Lamp Color of Wire Tan 1 Pink 2 Brown 3 Orange 4 Yellow 5 Green 6 Blue 7 Purple 8 Gray 9 White SWITCHED BATTERY POSITIVE FROM FUSE 1 Refer to the Engine Controller schematics J-11 8 10 MIL (CHECK ENGINE LAMP) 10 PIN F LT.BLUE/BLK ENGINE HARNESS CONNECTOR MIL SIGNAL FROM ECM PIN 26 T20 Service Information (5-2017) ELECTRICAL TROUBLESHOOTING T20 Engine Oil Pressure, Temperature, and MIL System (Diesel) Engine Oil Pressure Switch i This drawing is shown with key switch ON, and engine running BATTERY POSITIVE FROM AUX 1 RELAY CONTACTS 5 TO FUEL PUMP RELAY M10 BATTERY NEGATIVE Touch Panel / Control Board 6 FUSE 5 15 AMP 14 28 LOW ENGINE OIL PRESSURE LAMP J-12 PIN P2-27 9 PIN P1-19 NO CONNECTION OIL PRESSURE SWITCH J-11 E 8 PIN A S-3 5 5 ENGINE HARNESS CONNECTOR A B 13/BLK 27 C 27 10 PIN ENGINE HARNESS CONNECTOR B&C CLOSED = LOW OIL PRESSURE A&B CLOSED = OIL PRESSURE OK E Engine Temperature Switch BATTERY NEGATIVE Touch Panel / Control Board Wiring Color Codes (Unless otherwise marked) Right Most Digit of Wire Number Color of Wire 0 Tan 1 Pink 2 Brown 3 Orange 4 Yellow 5 Green 6 Blue 7 Purple 8 Gray 9 White T20 Service Information (5-2017) PIN P1-18 J-12 12 8 PIN B ENGINE HARNESS CONNECTOR 12 HIGH ENGINE TEMPERATURE SWITCH 13/BLK SW2 OPEN = BELOW 220°F CLOSED = ABOVE 220°F 111 ELECTRICAL TROUBLESHOOTING T20 Fuel Pump & Engine Speed Control (Gas / LPG) Fuel Pump (Gasoline Only) i This drawing is shown with key switch ON, and engine running 19 J-10 PINK/YEL D Refer to the Engine Controller schematics 6 PIN 19 13/BLK BLACK E FROM CHASSIS GROUND OF ENGINE HARNESS ENGINE HARNESS CONNECTOR FUEL PUMP E FROM FUSE 4 OF ENGINE HARNESS Speed Control Output PIN P2-24 PIN P2-25 Refer to the Engine Controller schematics J-12 Touch Panel / Control Board 8 PIN 11 Governor Speed “A” 18 ENGINE HARNESS CONNECTORS YEL/DK.BLUE Governor Speed “B” GRAY/DK.BLUE E TO PIN 34 OF ECM TO PIN 48 OF ECM B 6 PIN J-10 Wiring Color Codes (Unless otherwise marked) Right Most Digit of Wire Number 0 112 Color of Wire Tan 1 Pink 2 Brown 3 Orange 4 Yellow 5 Green 6 Blue 7 Purple 8 Gray 9 White Low Engine Speed High Engine Speed 950 (+/- 25) 2400 (+/- 25) Voltage Speed “A” 5 VDC 0 VDC Voltage Speed “B” 0 VDC 0 VDC ENGINE SPEED CHART Engine RPM T20 Service Information (5-2017) ELECTRICAL TROUBLESHOOTING T20 Fuel Pump (Diesel) i BATTERY POSITIVE WHILE CRANKING FROM START RELAY M7B 77 BATTERY NEGATIVE This drawing is shown with key switch ON, and engine running J-11 87a 77 J M10C FUEL PUMP 30 67 13/BLK 10 PIN SWITCHED BATTERY POSITIVE FROM SHUTDOWN RELAY M6C 3 A D-5 3 3 87 M10B ENGINE HARNESS CONNECTOR Touch Panel / Control Board PIN P1-19 3 86 Right Most Digit of Wire Number 0 Color of Wire Tan 1 Pink 2 Brown 3 Orange 4 Yellow 5 Green 6 Blue 7 Purple 8 Gray 9 White T20 Service Information (5-2017) 85 5 J-12 9 NO CONNECTION (Unless otherwise marked) M10A OIL PRESSURE SWITCH 8 PIN A S-3 5 ENGINE HARNESS CONNECTORS Wiring Color Codes E FUEL PUMP RELAY E 27 5 5 A B 13/BLK 27 C 10 PIN J-11 B&C CLOSED = LOW OIL PRESSURE A&B CLOSED = OIL PRESSURE OK 113 ELECTRICAL TROUBLESHOOTING T20 Engine Speed Control (Diesel) J-12 Touch Panel / Control Board PIN P2-24 8 PIN 11 29 E BATTERY NEGATIVE Governor Speed “A” ENGINE HARNESS CONNECTORS PIN P2-25 18 B Governor Speed “B” NO CONNECTION 6 PIN J-10 Low Engine High Engine Speed Speed ENGINE SPEED CHART Engine RPM E 1350 2400 Voltage Speed “A” 5 VDC 0 VDC Voltage Speed “B” 0 VDC 0 VDC (Unless otherwise marked) Color of Wire 0 Tan 1 Pink 29 THROTTLE ACTUATOR 59 61 GOVERNOR CONTROLLER 3 Right Most Digit of Wire Number 13/BLK + - 3 114 MAGNETIC PICK-UP (ENGINE SPEED) SENSOR SWITCHED BATTERY POSITIVE FROM SHUTDOWN RELAY M6C Wiring Color Codes 13/BLK 61 J-11 A A B C 60 61 D 29 E F G H 3 13/BLK 3 10 PIN ENGINE HARNESS CONNECTOR 13/BLK Governor Controller Pin Chart pin description A INPUT – Battery Positive B INPUT – Battery Negative 2 Brown C INPUT – Engine Speed Sensor 3 Orange 4 Yellow D INPUT – Engine Speed Sensor 5 Green E OUTPUT – Throttle Actuator (PWM) 6 Blue F OUTPUT – Throttle Actuator 7 Purple 8 Gray G INPUT – Engine Speed Selection “A” 9 White H INPUT – Engine Speed Selection “B” T20 Service Information (5-2017) ELECTRICAL TROUBLESHOOTING T20 Key On Power Distribution Conditions: Key On, Engine Off 12 VDC + 1/RED - 13/BLK ALTERNATOR 1/RED + GREEN JUMPER WIRE - 1/RED S1 30 50 2 17 42 19 42 ACC 4 To M7 StartRelay To GlowPlug Circuit (Diesel only) FUSE 1 8 8 86 15 AMP KEY SWITCH RUN 4 1/RED 85 13/BLK 6 TO FUSES 9 &12 AUX. 1 RELAY 1/RED 30 87 6 TO FUSE 6 Touch Panel / Control Board 15 AMP 14 FUSE 10 1/RED 81 3 PIN P2-1 PIN P2-2 PIN P2-34 PIN P2-35 13/BLK 13/BLK 13/BLK STATIC GROUND 105 E PIN P1-23 86 8 8 PIN P2-33 PIN P2-3 15 AMP SHUTDOWN RELAY CONTACTS 14 14 14 1/RED 1/RED 13/BLK FUSE 5 14 M1B D-2 1/RED M1A M2A 85 13/BLK 13/BLK M6C 3 (Normally CLOSED) To Engine Harness Connector Pin P1-A 1/RED 8 To LP1 Alternator Lamp & Parking Brake Lamp 1/RED AUX. 2 RELAY 1/RED 30 M2B 587 5 TO FUSES 7 &8 Wiring Color Codes (Unless otherwise marked) Right Most Digit of WireNumber 0 Color of Wire 8 Tan 1 Pink 2 Brown 3 Orange 4 Yellow 5 Green 6 Blue 7 Purple 8 Gray 9 White T20 Service Information (5-2017) 1/RED 86 TO FUSES 2,3, & 11 1/RED M8A 85 13/BLK 13/BLK AUX. 3 RELAY 30 M8B 587 27 TO FUSES 13 & 14 115 ELECTRICAL TROUBLESHOOTING T20 Key Off Power Distribution Conditions: Key Off 12 VDC + 1/RED - 13/BLK ALTERNATOR 1/RED + 1/RED GREEN JUMPER WIRE - 30 50 17 19 ACC M/7B 77/PUR 1/RED OFF B+ WHILE CRANKING START RELAY 1/RED 1/RED 1/RED 1/RED SEE DIODE D-2 128/GRY Wiring Color Codes (Unless otherwise marked) 128 B+ Extra Fused B+ 27 (AUX #3) 5 (AUX #2) 6 (AUX #1) 1/RED 1 (UNSWITCHED B+) Fuse 11 15A 5 / GRN 27 / PUR Aux. 3 Relay Aux. 2 Relay 6 / BLU Aux. 1 Relay E 1/RED KEY SWITCH Right Most Digit of Wire Number Color of Wire 0 Tan 1 Pink FUSE-2 122/BRN 15A 1/RED FUSE-3 2 Brown 3 Orange 4 Yellow 5 Green 6 Blue 7 Purple 8 Gray 9 White 25/GRN 15A ! i 116 Be cautious when working near Control Board Battery voltage is always present, even with Key OFF Pin P2-3 supplies power to the on-board clock only. Disconnecting battery, removing Fuse 10, or removing connector P2 from Control Board will require the clock to be reset. T20 Service Information (5-2017) ELECTRICAL TROUBLESHOOTING T20 Horn Conditions: Key On, Switch Activated UNSWITCHED BATTERY POSITIVE BATTERY NEGATIVE HORN 1/RED FUSE 3 25 M5B 30 87 13/BLK 23 15 AMP 23 D1 HORN RELAY 25 Wiring Color Codes 86 M5A (Unless otherwise marked) Right Most Digit of Wire Number Color of Wire 0 Tan 1 Pink 2 Brown 3 Orange 4 Yellow 5 Green 6 Blue 7 Purple 8 Gray 9 White 13/BLK 85 HORN SWITCH 13/BLK 92 S-22 OPEN = HORN OFF CLOSED = HORN ON E HORN HORN T20 Service Information (5-2017) 117 118 SV-3 SV-4 Main Brush Head Lower Valve ON Rear and Side Squeegees Side Brush Lower Valve E when low E when low D P2-14 P2-19 SOL-2 SOL-3 D D P2-20 P2-17 P2-18 M4A M6A n/a Shut Down Relay ON Detergent Pump ON OR n/a n/a n/a Governor Speed Bit "A" Governor Speed Bit "B" Lamp n/a Audible Alarm Low Engine Oil Pressure FaST Detergent Pump ON ON Reverse Propel Relay ON P2-25 P2-24 P2-27 P2-29 P2-21 E ES only E = Input required to ENABLE output D D SOL-7 P2-23 P2-26 D SOL-6 D ES only D SOL-5 SOL-4, P2-22 M11 P2-13 SOL-1 E E E D = Input req D P2-9 SV-12 E D P2-12 SV-11 E E E D P2-9 P2-8 FaST Side Brush Valve ON Side Brush Solution Valve D E E D see notes D E D P2-6 see notes E E P2-5 see notes see notes D E n/a P1-1 Propel Pedal Sensor REVERSE P2-5 n/a P1-1 Propel Pedal Sensor FORW ARD see notes S-23 P1-21 Impact Sensor Closed E Enable Valve, Air Pump & Water Pump Relay ON FaST High Flow Valve ON Valve ON ES Pump ON OR FaST Valve ON Main Brushes Solution Valve ON Auto-Fill Recovery Tank Auto-Fill Solution Tank ON ON Side Brush Extend Valve S-20 P1-17 Hydraulic Oil Temperature Sensor above 230F P2-11 SV-10 Valve ON S-19 P1-11 Soution Tank Empty Switch Closed E Side Brush Down Pressure S-17 P1-15 Clogged Hydraulic Filter Switch Closed E SV-8 Side Brush Spin Valve ON S-16 P1-14 Recovery Tank Half Full Switch Closed see notes D S-15 P1-13 Recovery Tank Full Switch Closed D P2-4 S-14 P1-12 Solution Tank Full Switch Closed D SV-7 Hydraulic Enable Valve ON SV-6 Main Brushes Spin Valve ON Lower Valve ON SV-2 S-8 P1-4 S-7 P1-4 com ponent # pin SV-1 P2-28 Main Brush Head Down Pressure Valve ON ON Scrub Vacuum Fan Valve Fuel Pressure Switch Closed (LPG) Fuel Level Sender (Gas, Diesel) Input E Output M20 Control Board Inputs and the Outputs they Control OneStep Scrub ON; Squeegee/Scrub Vacuum ON Touch Panel Input(s) Required to ENABLE OneStep Scrub ON; Squeegee/Scrub Vacuum ON Side Brush ON (after OneStep Scrub ON) Side Brush ON (after OneStep Scrub ON) Side Brush ON (after OneStep Scrub ON) Speed Turning ON Any Touch Panel Function OR Selecting High Engine Refer to OneStep Scrub ON Notes E Refer to OneStep Scrub ON Notes Refer to OneStep Scrub ON Notes n/a P1-1 Propel Pedal Sensor NEUTRAL OneStep Scrub OFF; Low Engine Speed Selected; Side Brush OFF OneStep Scrub OFF; Low Engine Speed Selected; Side Brush OFF OneStep Scrub OFF; Low Engine Speed Selected; Side Brush OFF Refer to Notes OneStep Scrub OFF; Low Engine Speed Selected OneStep Scrub OFF; Low Engine Speed Selected; Squeegee/Scrub Vacuum OFF OneStep Scrub OFF; Low Engine Speed Selected OneStep Scrub OFF; Low Engine Speed Selected OneStep Scrub OFF; Squeegee/Scrub Vacuum OFF; Low Engine Speed Selected Touch Panel Input(s) Required to DISABLE If low oil pressure, engine ECM will shutdown the engine after a time delay Turns OFF automatically if not required (SV-7 is required for all hydraulic functions EXCEPT sweep and scrub vacuum fans) Propel required to to get full operational down pressure Propel required to to get full operational down pressure Propel required to to get full operational down pressure Notes ELECTRICAL TROUBLESHOOTING T20 Enable/Disable Chart T20 Service Information (5-2017) ELECTRICAL TROUBLESHOOTING T20 Control Board Connectors P1 Connector i Viewed from wire side of connector Socket # P1‐1 P1‐2 P1‐3 P1‐4 P1‐5 P1‐6 P1‐7 P1‐8 P1‐9 P1‐10 P1‐11 P1‐12 P1‐13 P1‐14 P1‐15 P1‐16 P1‐17 P1‐18 P1‐19 P1‐20 P1‐21 P1‐22 P1‐23 P1‐24 P1‐25 P1‐26 P1‐27 P1‐28 P1‐29 P1‐30 P1‐31 P1‐32 P1‐33 P1‐34 P1‐35 T20 Service Information (5-2017) Wire # Color Type Goes To: 91 Pink Input Forward/Reverse Propel Sensor 150 Tan Input ec‐H20 Green LED 89 White Input Switch 6 Hopper Position 30 Tan Input Fuel Sensor 129 White Input Thermal Sentry 39 White Input Shaker Switch (Partial) 35 Green Input Hopper Up/Dn Switch (Signal Down) 36 Blue Input Hopper Up/Dn Switch (Signal Up) 42 Brown Input Hopper Door Switch (Signal Door Open) 43 Orange Input Hopper Door Switch (Signal Door Close) 177 Purple Input Solution Tank Empty 44 Yellow Input Solution Tank Full 45 Green Input Recovery Tank Full 46 Blue Input Recovery Tank 1/2 Full 90 Tan Input Clogged Hydraulic Filter 48 Gray Input Clogged Shaker Filter (N.O. / Closed=Clogged) 78 Gray Input Hydraulic Temp Sensor 12 Brown Input Engine Temp. DSL 9 White Input N.O. Oil Pressure 149 White Input ec‐H20 Red LED 94 Yellow Input Connects to CE Seat Switch Harness 186 Blue Input To: Engine ECM 187 Purple Input To: Engine ECM 22 Brown Input Brake Sitch Sense ‐‐ CAN+/Yellow ‐‐ User Interface Module ‐‐ CAN‐/Green ‐‐ User Interface Module XXX XXX XXX XXX XXX XXX XXX XXX 10 Tan Input To: Engine ECM XXX XXX XXX XXX XXX XXX XXX XXX 7 Purple Input Alternator Charging XXX XXX XXX XXX 16 Blue Output Flyback Net 17 17 Purple Output Flyback Net 18 E 119 ELECTRICAL TROUBLESHOOTING T20 Control Board Connectors P2 Connector E 120 Socket # P2‐1 P2‐2 P2‐3 P2‐4 P2‐5 P2‐6 P2‐7 P2‐8 P2‐9 P2‐10 P2‐11 P2‐12 P2‐13 P2‐14 P2‐15 P2‐16 P2‐17 P2‐18 P2‐19 P2‐20 P2‐21 P2‐22 Wire # 14 14 49 57 58 59 60 61 50 63 64 66 65 67 68 69 70 71 72 181 74 75 Color Yellow Yellow White Purple Gray White Tan Pink Tan Orange Yellow Blue Green Purple Gray White Tan Pink Brown Pink Yellow Green Type 12 VDC P2‐23 P2‐24 P2‐25 P2‐26 P2‐27 P2‐28 P2‐29 P2‐30 P2‐31 P2‐32 P2‐33 P2‐34 P2‐35 79 11 18 80 92 56 182 62 53 138 13 13 13 White Pink Gray Tan Brown Blue Brown Brown Orange Green Black Black Black Output Output Output Output Output Output Output Output Output Output Output Output Output Output Output Output Output Output Output Output Output Output Output Output Output Output Output Output Output Output Output Output Output Goes To: Board Flyback Net: 14 Main Brush On Main Brush Pattern (PWM) Main Brush Down Squeegees Down Hopper Up Enable Valve Side Broom Extend Sweep Vac Fan On Side Srub Pattern (PWM) Side Broom Down Opt: Auto Fill Sol Opt: Auto Fill Rec Hopper Door Open Shaker Relay Reverse Relay Shutdown Relay Main Scrub Water Valve Side Brush Water Valve Detergent Pump (PWM) ES Pump (Opt.) Fast High Flow Valve / Fast Pump (Opt.) Speed Bit A Speeed Bit B Fast Side Brush Horn Relay Scrub Vac Fan On Audibile Alarm Side Scrub On Hopper Down Hopper Latch Sol. Ground1 Ground2 Ground3 i Viewed from wire side of connector T20 Service Information (5-2017) ELECTRICAL TROUBLESHOOTING T20 Fault Indicators The following table describes fault codes communicated to the operator. A fault code is indicated by blinking a Fault LED (red), sounding an alarm, and also by displaying the fault name on the LCD. Faults can be cleared when they are no longer present and one of the action buttons (i.e. One-Step) is depressed. If there is more than one fault, they are displayed for about a second one after the other. Fault Hydraulic Filter Clogged LCD Display Description F3: CLOGGED HYD Indicates the hydraulic filter is clogged. Solution Tank empty F6: SOL. TANK E Indicates the solution tank is empty. Recovery Tank Full F7: REC. TANK FULL Indicates the recovery tank is full and shuts down the entire Scrub system. High Engine Temperature F8: HIGH ENG TEMP Indicates high engine temperature. High Hydraulic Temperature F9: HIGH HYD TEMP Indicates excessive hydraulic temperature F10: LOW FUEL Low fuel indicator (blinking lowest fuel gauge block). F11: OPEN SCB VAC Indicates squeegee may have broken free. Low Fuel Squeegee Disconnected (Option) T20 Service Information (5-2017) E 121 ELECTRICAL TROUBLESHOOTING T20 Condition & Warning Indicators The following table describes displayed conditions or warnings. If a condition is sensed, the condition or warning code will be displayed on the LCD. Conditions are typically caused by activating buttons that are unavailable. For example: the Sweep vacuum fan is unavailable when the scrub functions are active. Condition E 122 LCD DISPLAY Description FaST system is selected by the operator and the machine is not configured with the FaST option. C3: NO FAST MODE Only machines with the FaST system installed (and programmed to be FaST machines) can turn ON the FaST system. ES system is selected by the operator and the machine is not configured with the ES option. C4: NO ES MODE Only machines with the ES system installed (and programmed to be ES machines) can turn ON the ES system. FaST or ES system is selected by the operator and the machine is not configured with the ES or FaST option. C5: NO ES/FAST Only machines with the ES or FaST system installed (and programmed to be ES or Fast machines) can turn ON the ES or FaST system. Side Brush button is activated alone without 1STEP Sweep/Scrub. C6: NO SIDE BRUSH The T20 machine is NOT programmed to operate with only the side brush ON. T20 Service Information (5-2017) HYDRAULIC TROUBLESHOOTING HYDRAULIC TROUBLESHOOTING T20 SERVICE INFORMATION Hydraulic Troubleshooting HYDRAULIC Troubleshooting Information • BEFORE CONDUCTING TESTS: * Read and Follow ALL Safety Warnings and Precautions as mentioned at the beginning of this manual * Engine & Hydraulic Oil Must Be At Normal Operating Temperatures after Running Machine and Hydraulics a Minimum of 5 Minutes * Examine Machine For Any Linkage Binding or Mechanical Problems • DURING TESTS: * Call Technical Services if Diagnostic Time Exceeds One Hour With Unknown Cause or Course of Action * Maintain Normal Main Brush Pressure as Listed in Operator’s Manual NOTE: Troubleshooting charts may be shown with optional equipment. The optional equipment may not be specified in these charts. Some machines may not be equipped with all components shown. T20 Service Information (5-2017) 123 HYDRAULIC TROUBLESHOOTING T20 General Information Commonly Used Hydraulic Symbols Lines Connected Together Pressure / Flow Line Suction Line Return or Low Pressure Line Active Pilot Port Line Inactive Pilot Port Line Case Drain Line Lines Not Connected Together i ! Warning! Information Hydraulic Cylinder Hydraulic Solenoid Valve Quick Connect Test Port Restrictor or Orifice EXAMPLES Component is Rotating Hydraulic Flow No Connection Oil Tank or Reservoir Hydraulic Motor Check Valve Pilot Port Check Valve Oil Cooler or Heat Exchanger Component is Energized Variable or PWM Spring Loaded Check Valve Oil Filter With Bypass Non-Energized Coils Energized Coils Arrow indicates a PWM (Pulse Width Modulated) valve Hydraulic Pump Pressure Reducing Valve Relief Valve Assembly A SV14 SV7 SV19 B SV25 Indicates Energized Solenoid Valve Coil 124 Circled envelope is valve position for indicated hydraulic circuit T20 Service Information (5-2017) HYDRAULIC TROUBLESHOOTING T20 General Information T20 Hydraulic Pump Flow Rates (typical) PROPEL PUMP ACCESSORY PUMPS ENGINE @ 2400 RPM 12.5 GPM (47.3 LPM) maximum 10 GPM 6 GPM 4 GPM (37.9 LPM) (22.7 LPM) (15.1 LPM) PUMP 1 PUMP 2 PUMP 3 Commonly Used Abbreviations AUX CIR CK CM CONV CU CV CYL DC DC E FLTR GPM HTX IN LH LPM LS M Auxiliary Cubic Inch Dis placem ent per Revolution Check Valve Centim eters Conveyor Cubic Control Valve Cylinder Dis connect Coupler (Hydraulic) Direct Current (Electrical) Engine (Com bus tion) Filter Gallons Per Minute Heat Exchanger Inches Left Hand Liters Per Minute Load Sens e Motor (Com bus tion) MFLD MTR OR PC PMP PR PSI PTO PWM RES RH RPM RV SC STRN SV SW TV V Manifold Motor (Hydraulic) Orifice Pilot Port Check Valve Pum p Pres s ure Relief Valve Pounds Per Square Inch Power Take Off Puls e Width Modulation Res ervoir Right Hand Revolutions Per Minute Relief Valve Spring Loaded Check Valve Strainer Solenoid Valve Switch Throttle Valve Volts Typical Hydraulic Manifold Port Markings C G LS Hydraulic Cylinder Connection Test Port Load Sense Port T20 Service Information (5-2017) M P R or T Hydraulic Motor Connection Pump Connection Return Port (To Tank) 125 HYDRAULIC TROUBLESHOOTING STANDARD PARTS HYDRAULIC SCHEMATIC Fig. 51 − Hydraulic Schematic 1 2 354520 − T20 126 2‐104 T20 Service Information (5-2017) T20 Gas/LPG 9016201 (12−2016) Home Find... Go To.. HYDRAULIC TROUBLESHOOTING STANDARD PARTS Fig. 51 − Hydraulic Schematic 1 2 354520 − T20 127 T20 Service Information (5-2017) T20 Gas/LPG 9016201 (12−2016) Home 2‐105 Find... Go To.. 128 Operate Side Brush Side Brush G6 Operate Scrub Fan G5 G13 G5 G7 Up Down Retract Extend G6 G5 Operate Main Brushes G5 Up G5 G1 Down G5 Test Port Function Squeegees, Down Side and Rear Up Scrub Head Component / System SV8 Scrub Manifold Use Manual Mode during testing Scrub Manifold Use Manual Mode during testing to obtain full down pressure; SV3 and SV6 are tied together electrically * SV7 is Enable Solenoid for the given functions M1 C3 C4 C2 C1 Feed Port Side Brush Left front corner of Manifold frame C7 C5 C6 C8 M2 Left side, engine Accessory compartment, Pump # 2 beside vacuum fan Left side, engine compartment, beside vacuum fan Left side, engine compartment, beside vacuum fan Left side, engine compartment, beside vacuum fan Location Side Brush Left front corner of Manifold frame Scrub Manifold Scrub Manifold Scrub Manifold Manifold(s) containing Solenoid Valve(s) Use Manual Mode during testing SV7* Operate Side Brush up and down using SV10, SV11, SV7* Manual Mode--Watch change in pressure on G5 and/or G13; SV8 and SV7* SV11 tied together electrically SV12, SV7* SV1 Scrub Manifold SV7* SV4, SV7* SV6, SV7* Side Valve Notes SV2, SV3, SV7* SV2 is PWM controlled; Down pressure varies with current to SV2; SV3 and SV7* SV6 are tied together electrically Energized Coil(s) Scrub Manifold Scrub Manifold N/A Scrub Manifold N/A Test Port Location C5 C7 C8 C6 T6 P3 Tank C4 C3 C1 C2 Exit Port RV2 RV1 RV1 RV2 RV2 RV2 Relief Valve in circuit 2500 2500 2500 2500 2500 2500 Relief Valve Pressure Setting (PSI) Operating Flow from accessory Pump # 1 (inner most pump) Operating Flow from accessory Pump # 2 (middle pump) Operating Flow from accessory Pump # 2 (middle pump) Operating Flow from accessory Pump # 1 (inner most pump) Operating Flow from accessory Pump # 1 (inner most pump) Operating Flow from accessory Pump # 1 (inner most pump) Notes HYDRAULIC TROUBLESHOOTING T20 Operating Matrix T20 Service Information (5-2017) HYDRAULIC TROUBLESHOOTING T20 Option Components The following chart lists various options and the electrical and/or hydraulic components that are associated with the option. Refer to the “notes” section for any components that are deleted from a standard machine in order to have the installed option. Spray Hose ES (Extended Scrub) Side Brush option added components E or H component # Side Brush ON Solenoid Valve E,H SV-8 Side Brush Pressure Solenoid Valve E,H SV-10 Side Brush Down Solenoid Valve E,H SV-11 Side Brush Extend Solenoid Valve E,H SV-12 FaST Side Brush Valve E SOL-6 Side Brush Water Valve E SOL-7 Side Brush Manifold H x Side Brush Lift Cylinder H x Side Brush Extend Cylinder H x Side Brush Motor H x Solution Tank Auto Fill Water Valve E SOL-1 Recovery Tank Auto Fill Water Valve E SOL-2 Solution Tank Full Switch E S-14 Recovery Tank Half Full Switch E S-16 Detergent Pump E x ES Pump E x Spray Hose Pump E x Spray Hose Relay E M12 Spray Hose Switch E S-25 notes If machine has ES option, the following components will not be on the machine: FaST Water Pump, FaST Water Pump Relay (M11), FaST Detergent Pump, FaST Air Pump, FaST Enable Valve (SOL-4), FaST High Flow Valve (SOL-5), FaST Side Brush Valve (SOL-6) E = Electrical Component H = Hydraulic Component T20 Service Information (5-2017) 129 HYDRAULIC TROUBLESHOOTING Hose Group: Steering and Propel 130 T20 Service Information (5-2017) HYDRAULIC TROUBLESHOOTING Hose Group: Pump and Vacuum Fan T20 Service Information (5-2017) 131 HYDRAULIC TROUBLESHOOTING Hose Group: Cylindrical Brush 132 T20 Service Information (5-2017) STANDARD PARTS HYDRAULIC TROUBLESHOOTING Fig. 55 − Hydraulic Hose Group, Disk Brush Hose Group: Disk Brush M1 C1 C2 Scrub Valve 2 1 Reservoir Brush LIft Cylinder 5 3 6 Main Brush Motor (Right) 4 Main Brush Motor (Center) 7 8 FRONT 2‐112 T20 Service Information (5-2017) Home Main Brush Motor (Left) T20 Gas/LPG 9016201 (8−2016) Find... Go To.. 133 HYDRAULIC TROUBLESHOOTING Hose Group: Squeegee Lift 134 T20 Service Information (5-2017) HYDRAULIC TROUBLESHOOTING T20 Scrub Head Lower Pressure / Flow Line Suction Line Return or Low Pressure Line Active Pilot Port Line Inactive Pilot Port Line Case Drain Line Engine Speed: High RPM SV7 P2 T2 Typical Default Pressure Readings (+/- 15%) G5 Setting RV2 2500 PSI (172.4 BAR) Scrub Head Actuator Gray items are energized or activated i SCRUB MANIFOLD Pressure at G1 P1 44psi (3 bar) P2 159psi (11 bar) P3 240psi (16.5 bar) ORIFICE 0.046 in (1.17 mm) *PWM* SCRUB HEAD ACTUATOR C1 LOWER SV2 G1 G2 SV3 NOTE SPRING ASSIST T1 PC1 (Cylindrical head ONLY) i ENGINE OIL FILTER C2 Pressure settings P1, P2, & P3 are the Touch Panel LED indicators for Main Brush down pressure OIL COOLER SCREEN 35 PSI (2.4 BAR) T20 Service Information (5-2017) 135 HYDRAULIC TROUBLESHOOTING T20 Scrub Head Lift Pressure / Flow Line Suction Line Return or Low Pressure Line Active Pilot Port Line Inactive Pilot Port Line Case Drain Line Engine Speed: High RPM i SCRUB MANIFOLD SV7 P2 Gray items are energized or activated T2 G5 RV2 2500 PSI (172.4 BAR) Scrub Head Actuator ORIFICE 0.046 in (1.17 mm) G1 SCRUB HEAD ACTUATOR C1 LIFT SV2 SV3 NOTE SPRING ASSIST G2 T1 (Cylindrical head ONLY) PC1 C2 ENGINE OIL FILTER OIL COOLER SCREEN 35 PSI (2.4 BAR) 136 T20 Service Information (5-2017) HYDRAULIC TROUBLESHOOTING T20 Squeegees Lower Engine Speed: High RPM Pressure / Flow Line Suction Line Return or Low Pressure Line Active Pilot Port Line Inactive Pilot Port Line Case Drain Line i SCRUB MANIFOLD SV7 P2 Gray items are energized or activated T2 G5 RV2 2500 PSI (172.4 BAR) ORIFICE 0.046 in (1.17 mm) T1 SV4 C2 PC2 C4 LEFT SQUEEGEE ACTUATOR RIGHT SQUEEGEE ACTUATOR ORIFICE ORIFICE 0.031 in (0.79 mm) LOWER LOWER LOWER 0.031 in (0.79 mm) REAR SQUEEGEE ACTUATOR ENGINE OIL FILTER OIL COOLER SCREEN 35 PSI (2.4 BAR) T20 Service Information (5-2017) 137 HYDRAULIC TROUBLESHOOTING T20 Squeegees Lift Engine Speed: High RPM Pressure / Flow Line Suction Line Return or Low Pressure Line Active Pilot Port Line Inactive Pilot Port Line Case Drain Line i SCRUB MANIFOLD SV7 P2 Gray items are energized or activated T2 G5 RV2 2500 PSI (172.4 BAR) ORIFICE 0.046 in (1.17 mm) T1 SV4 C2 PC2 C4 RIGHT SQUEEGEE ACTUATOR LIFT LIFT ORIFICE 0.031 in (0.79 mm) ORIFICE REAR SQUEEGEE ACTUATOR LIFT LEFT SQUEEGEE ACTUATOR 0.031 in (0.79 mm) ENGINE OIL FILTER OIL COOLER SCREEN 35 PSI (2.4 BAR) 138 T20 Service Information (5-2017) HYDRAULIC TROUBLESHOOTING T20 Main Brushes ON (Cylindrical Only) Pressure / Flow Line Suction Line Return or Low Pressure Line Active Pilot Port Line Inactive Pilot Port Line Case Drain Line Engine Speed: High RPM i SCRUB MANIFOLD SV7 P2 Gray items are energized or activated T2 G5 RV2 2500 PSI (172.4 BAR) CV1 SV6 M1 REAR CYLINDRICAL MAIN BRUSH MOTOR ENGINE i OIL FILTER FRONT CYLINDRICAL MAIN BRUSH MOTOR Main Brush Motors speed: 400-480 RPM OIL COOLER SCREEN 35 PSI (2.4 BAR) T20 Service Information (5-2017) 139 HYDRAULIC TROUBLESHOOTING T20 Main Brushes ON (Disk Only) Pressure / Flow Line Suction Line Return or Low Pressure Line Active Pilot Port Line Inactive Pilot Port Line Case Drain Line Engine Speed: High RPM i SCRUB MANIFOLD SV7 P2 Gray items are energized or activated T2 G5 RV2 2500 PSI (172.4 BAR) CV1 SV6 M1 LEFT DISK MAIN BRUSH MOTOR i ENGINE OIL FILTER CENTER DISK MAIN BRUSH MOTOR RIGHT DISK MAIN BRUSH MOTOR Main Brush Motors speed: 230 RPM (+/- 10%) OIL COOLER SCREEN 35 PSI (2.4 BAR) 140 T20 Service Information (5-2017) HYDRAULIC TROUBLESHOOTING T20 Side Brush ON Engine Speed: High RPM i Gray items are energized or activated Pressure / Flow Line Suction Line Return or Low Pressure Line Active Pilot Port Line Inactive Pilot Port Line Case Drain Line SCRUB MANIFOLD RV1 2500 PSI (172.4 BAR) T2 P1 G6 Side Brush Motor speed: 140-160 RPM i SV1 i Side Brush can only be operated when Main Brushes are ON M4 SIDE BRUSH MANIFOLD P3 SV8 T3 SCRUB FAN MOTOR M2 T6 25 PSI (1.7 BAR) SIDE BRUSH MOTOR ENGINE OIL FILTER OIL COOLER SCREEN 35 PSI (2.4 BAR) T20 Service Information (5-2017) 141 HYDRAULIC TROUBLESHOOTING T20 Scrub Vacuum Fan ON Engine Speed: High RPM i Gray items are energized or activated Pressure / Flow Line Suction Line Return or Low Pressure Line Active Pilot Port Line Inactive Pilot Port Line Case Drain Line SCRUB MANIFOLD RV1 2500 PSI (172.4 BAR) T2 P1 G6 SV1 i i M4 Scrub Fan Motor speed: 10,500 RPM (+/- 150 RPM) Scrub Fan Motor vacuum: 34-39 in/H2O (86-99 cm/H2O) measured at squeegee SIDE BRUSH MANIFOLD P3 SV8 T3 SCRUB FAN MOTOR M2 25 PSI (1.7 BAR) T6 SIDE BRUSH MOTOR ENGINE OIL FILTER OIL COOLER SCREEN 35 PSI (2.4 BAR) 142 T20 Service Information (5-2017) HYDRAULIC TROUBLESHOOTING T20 Scrub Vacuum Fan & Side Brush ON Engine Speed: High RPM i Gray items are energized or activated Pressure / Flow Line Suction Line Return or Low Pressure Line Active Pilot Port Line Inactive Pilot Port Line Case Drain Line SCRUB MANIFOLD RV1 2500 PSI (172.4 BAR) T2 P1 i G6 SV1 Scrub Fan Motor speed: 10,500 RPM (+/- 150 RPM) Scrub Fan Motor vacuum: 34-39 in/H2O (86-99 cm/H2O) measured at squeegee i i Side Brush Motor speed: 140-160 RPM SIDE BRUSH MANIFOLD P3 SV8 T3 SCRUB FAN MOTOR M2 T6 25 PSI (1.7 BAR) i Side Brush can only be operated when Main Brushes are ON SIDE BRUSH MOTOR ENGINE OIL FILTER OIL COOLER SCREEN 35 PSI (2.4 BAR) T20 Service Information (5-2017) 143 HYDRAULIC TROUBLESHOOTING T20 Side Brush Lower Engine Speed: High RPM Pressure / Flow Line Suction Line Return or Low Pressure Line Active Pilot Port Line Inactive Pilot Port Line Case Drain Line SCRUB MANIFOLD SV7 P2 i Gray items are energized or activated T2 G5 RV2 2500 PSI (172.4 BAR) ORIFICE 0.055 in (1.40 mm) Typical Default Pressure Readings (+/- 15%) Setting Pressure at G13 P1 300 psi (20.7 bar) P2 400 psi (27.6 bar) P3 500 psi (34.5 bar) P7 P4 *PWM* OR3 0.040 in (1.02 mm) SIDE BRUSH MANIFOLD G13 C6 SV11 G7 LOWER SV10 SIDE BRUSH LIFT ACTUATOR C8 PR1 400 PSI (27.6 BAR) T4 ENGINE OIL FILTER OIL COOLER SCREEN 35 PSI (2.4 BAR) 144 T20 Service Information (5-2017) HYDRAULIC TROUBLESHOOTING T20 Side Brush Lift Engine Speed: High RPM Pressure / Flow Line Suction Line Return or Low Pressure Line Active Pilot Port Line Inactive Pilot Port Line Case Drain Line SCRUB MANIFOLD SV7 P2 i Gray items are energized or activated T2 G5 RV2 2500 PSI (172.4 BAR) ORIFICE 0.055 in (1.40 mm) P7 P4 SIDE BRUSH MANIFOLD OR3 G13 0.040 in (1.02 mm) SIDE BRUSH LIFT ACTUATOR C6 SV11 SV10 PR1 400 PSI (27.6 BAR) LIFT C8 G7 T4 ENGINE OIL FILTER OIL COOLER SCREEN 35 PSI (2.4 BAR) T20 Service Information (5-2017) 145 HYDRAULIC TROUBLESHOOTING T20 Side Brush Extend Engine Speed: High RPM Pressure / Flow Line Suction Line Return or Low Pressure Line Active Pilot Port Line Inactive Pilot Port Line Case Drain Line SCRUB MANIFOLD SV7 P2 i Gray items are energized or activated T2 G5 RV2 2500 PSI (172.4 BAR) ORIFICE 0.055 in (1.40 mm) P7 P4 OR3 0.040 in (1.02 mm) PR1 SIDE BRUSH MANIFOLD G7 400 PSI (27.6 BAR) SIDE BRUSH EXTEND ACTUATOR C7 EXTEND SV12 G10 PC8 C5 T4 ENGINE OIL FILTER OIL COOLER SCREEN 35 PSI (2.4 BAR) 146 T20 Service Information (5-2017) HYDRAULIC TROUBLESHOOTING T20 Side Brush Retract Engine Speed: High RPM Pressure / Flow Line Suction Line Return or Low Pressure Line Active Pilot Port Line Inactive Pilot Port Line Case Drain Line SCRUB MANIFOLD SV7 P2 i Gray items are energized or activated T2 G5 RV2 2500 PSI (172.4 BAR) ORIFICE 0.055 in (1.40 mm) P7 P4 OR3 0.040 in (1.02 mm) PR1 SIDE BRUSH MANIFOLD G7 400 PSI (27.6 BAR) SIDE BRUSH EXTEND ACTUATOR C7 G10 RETRACT SV12 PC8 C5 T4 ENGINE OIL FILTER OIL COOLER SCREEN 35 PSI (2.4 BAR) T20 Service Information (5-2017) 147 HYDRAULIC TROUBLESHOOTING T20 Hydraulic Solenoid Valve Details SV1 SV3 SV4 SV2 *PWM* SV6 SV7 SV8 SV10 *PWM* SV11 148 SV12 T20 Service Information (5-2017) SERVICE SERVICE PROPANEL SERVICE MODES SERVICE MODE The Service Modes are designed for Service Technician use only. A qualified Service Technician can interface with the machine to configure the machine and to test specific components. 1. Key switch on. With the machine display powered on, press the ‘Question Mark’ Icon. 2. Press the Login Icon and enter the Service Mode Login number and press the enter icon. (083957530) T20 Service Information (5-2017) 3. Press the ‘Gears’ icon. 4. Using the down arrow, scroll to the bottom of the listed functions. 149 SERVICE MANUAL MODE 1. Enter the Service Mode (See SERVICE MODE) and press the right arrow to scroll to the MANUAL MODE screen. 2. To enter the Manual Mode, press the ‘Check Mark’ icon. 3. Manual Mode allows viewing many component amperage draws or RPM. This includes: • • • • • • • • • • • • • • • • • • • • • • • • • • • • • M01: Hyd Enable = Hydraulic Enable M02: MB Down Act = Main Brush Dwn Actuator M03: MB ON Motor = Main Brush Motor ON M04: MB DP PWM = Main Brush Down Pressure M05: MB WaterVlv - Main Brush Water Valve M06: SB Ext. Act = Side Brush Extend Actuator M07: SB Down Act = Side Brush Down Actuator M08: SB ON Motor = Side Brush Motor ON M09: SB DP PWM = Side Brush Down Pressure M10: SB WaterVlv = Side Brush Water Valve M11: Water Vac = Water Vacuum M12: Dust Vac = Dust Vacuum M13: Squeegee Act = Squeegee Actuator M14: Hopper Valve1 -= Hopper Valve 1 M14: Hopper Valve2 = Hopper Valve 2 M15: Hp Latch = Hopper Latch M16: Hp Door = Hopper Door M17: Shaker - Shaker M18: Reverse = Reverse Sensor M19: Shutdown = Shutdown Relay M20: Alarm = Alarm M21: Horn = Horn M22: Det Pump = Detergent Pump M23: Alt Pump = Alternate Pump M24: AltHighFlow = Alternate High Flow M25: AltSideBrush = Alternate Side Brush M26: Sol AutoFill = Solution Auto Fill M27: Rec AutoFill = Recovery Auto Fill M28: Engine Speed = Engine RPM 150 Note: If a component is not installed on the machine, the message ‘Not Installed’ is displayed. 4. To activate a component, press the check mark. To deactivate a component, press the check mark again. Note: When a component is active, the amperage output to that component or the RPM of that component is displayed. 5. To exit Manual Mode, use the right arrow to scroll to the Exit Manual Mode screen and press the ‘Check Mark’ icon twice. T20 Service Information (5-2017) SERVICE CONFIGURATION MODE Configuration Mode is an onboard diagnostic utility that configures controller software to operate optional equipment and to electronically adjust certain output functions. 4. Press the right arrow to scroll to the next configuration option and the ‘Check Mark’ icon to change settings. 1. Enter the Service Mode (See SERVICE MODE) and press the right arrow to scroll to the CONFIG MODE screen. 2. To enter the CONFIG MODE, press the ‘Check Mark’ icon. 5. Continuously press the right arrow to scroll to the desired configuration option and press the ‘Check Mark’ icon to choose a setting. 3. The C1: MainBrushHead choice feature is used on the T20 machines. You can choose Disk or Cylindrical Head Type. T20 Service Information (5-2017) 151 SERVICE 6. If no change is required, press the right arrow until you see the ‘Exit’ option and press the ‘Check Mark’ icon twice, to exit. SELF TEST MODE Self Test Mode is an onboard diagnostic utility that tests for open or shorted output circuits. Once completed, open and/or shorted output faults, are displayed. 1. Enter the Service Mode (See SERVICE MODE) and press the right arrow to scroll to the SELF TEST MODE screen. 2. To enter the SELF TEST MODE, press the ‘Check Mark’ icon. 7. Follow the same procedure for other optional equipment and water flow rate setup. Including: • C1: Main Brush Head • C2: Alt Solution • C5: Side Brush • C6: Seat Switch • C7: Water Level • C8: IRIS Module • C9: Run-In Mode • C10: Neut. Scrub Additional Water Level Setting Information: There are three water level range setting options. • Economy • Normal • Heavy When a settings is chosen, the operator can adjust three flow rate settings within that range. 3. The self test will automatically begin. CAUTION: Many of the machine functions will automatically turn on. Stay clear of the machine during the self test. These are a few examples of the tests performed during the Self Test process. The table on the next page shows all of the test names and descriptions. • • • • • Test Hydraulic Enable Valve Test Main Brush Down Actuator Test Main Brush Motor Test Main Brush PWM Valve Test Alternate Solution Pump Some of the tests listed will only be performed if the machine has that specific option and it is configured correctly. 4. When the self test is completed, faults found will be displayed as an open or shorted load. 152 T20 Service Information (5-2017) SERVICE 5. If faults exist, continually press the right arrow icon to display all faults found. If there are no other faults found or no faults found initially, ‘Self Test End’ is displayed. Pressing the right arrow again will display any faults found again. All successful tests performed will result in the message ‘Done’. This indicates that test passed. If a fault is found during the ‘Self Test’ , either ‘Open’ or ‘Short’ will be displayed for that test. “Open” (Indicates current could not be delivered to that circuit) “Short” (The current draw is over the threshold, indicating a short circuit) Follow the diagnostic steps in this manual for diagnosing an open or shorted circuit. To exit the self test mode, turn off the machine key. The machine will return to normal operational mode when the key switch is turned on again. Self Test Name: Test Description: 1:Enable Hydraulic Test the valve which enables machine hydraulics. Valve Tests the valve which controls 2:MBrush Down ‘Main Brush Down’ actuation. 3:MBrush Motor Tests the valve which controls the Main Brush motor 4:MBrush PWM Valve Tests PWMed control of the Main Brush Down valve (for down pressure control). 5:MBrush Water Valve Tests the valve which controls solution delivery to the Main Brush. 6:SBrush Down Actuator 7:SBrush Ext Actuator Tests the valve which controls ‘Side Brush Down’ actuation. 8:SBrush Motor Test the valve which controls the Side Brush motor. 9:SBrush PWM Valve Tests PWMed control of the Side Brush Down valve (for down pressure control). 10:SBrush Water Valve Tests the valve which controls solution delivery to the Side Brush 11:Scrub Vac Fan Tests the vacuum fan for the scrub subsystem (‘water pickup fan). 12:Sweep Vac Fan Tests the vacuum fan for the sweep subsystem. 13: Squeegee Act Tests the valve which controls the Squeegee Actuator. 14: SolTnk AF Tests the Autofill valve for the Solution Tank. (If Equipped) 15:RecTnk AF Tests the Autofill valve for the Recovery Tank. (If Equipped) 16:ReverseRelay Tests the relay for reverse driving. 17:ShakerRelay Tests the relay for the filter shaker. 18:Horn Horn test. 19:Alarm Backup alarm test. Tests the valve which controls ‘Side brush Extension’ actuation. 28: ShudownRelay Tests the emergency engine shutdown relay. T20 Service Information (5-2017) 153 SERVICE INPUT DISPLAY MODE Input Display Mode is an onboard diagnostic utility that displays controller input conditions. Input Display Mode displays text messages for hard-wired switch, sensor, and touch panel button inputs. 6. Enter the Service Mode (See SERVICE MODE) and press the right arrow to scroll to the INPUT DISPLAY MODE screen. THROTTLE ADJUST MODE 1. Enter the Service Mode (See SERVICE MODE) and press the right arrow to scroll to the THROTTLE ADJUST MODE screen. 2. To enter the THROTTLE ADJUST MODE, press the ‘Check Mark’ icon. 7. To enter the INPUT DISPLAY MODE, press the ‘Checkmark’ icon. 8. The display will indicate the switch or sensor being tested. When the position of the switch or the state of the sensor is changed, the results of that change is displayed. The components that can be tested with Input Display Mode Include: • • • • • • • • • • • • • • • • • • • • • • • • I1: SolTnk Empty I2: SolTnk Full I3: RecTnk Full I4: RedTank 1/2Full I5: Clogged HpFlt I6: CloggedHydFlt I7: ThermalSentry Hopper Fire I8: Seat Switch I9: Brake Switch I10: HighEngTemp I11: Low Oil Psr I12: Check Engine I13: EcH2o Green I14: EcH2o Red I15: Hp Position I16: FilterShaker I17: Hp Up Rocker I18: HPDownRocker I19: HpDoor Open I20: HPDoor Close I21: Alternator I22: Throttle I23: Fuel Sender I24: Hyd Temp 154 3. The actual ‘Neutral Voltage’ value of the throttle position sensor is displayed. Pressing the ‘Check Mark’ sets the Forward and Reverse sense voltage values, based on this Neutral Voltage value. The machine operation should be tested to confirm the rear squeegee raises and lowers at the proper times when the machine is propelled forward and backward. 4. If the rear squeegee raises and lowers too soon or too late, you will need to adjust the Reverse voltage value and/or the Forward voltage value. Press the right arrow to proceed to the Forward Threshold voltage value. T20 Service Information (5-2017) SERVICE Note: the ‘C’ indicates the Current voltage value and the ‘N’ indicates the New voltage value you are setting. Press the ‘minus’ icon to reduce the N (New) value and the ‘Positive’ icon to increase the N value. DOWN PRESSURE ADJUST MODE The higher the value (a value closer to the Neutral Voltage value), the quicker the system will react to forward direction movement. Press the ‘Check Mark’ to make your ‘N’ New value the ‘C’ Current value. 2. To enter the DOWN PRESSURE ADJUST MODE, press the ‘Check Mark’ icon. 1. Enter the Service Mode (See SERVICE MODE) and press the right arrow to scroll to the DOWN PRESSURE ADJUST MODE screen. 3. To enter the DOWN PRESSURE ADJUST MODE for the Main Scrub Brushes, press the ‘Check Mark’ icon. 5. Press the right arrow to proceed to the Reverse Threshold voltage value. 4. To enter the ‘L’ (Low Down Pressure Setting Mode) for the Main Scrub Brushes, press the ‘Check Mark’ icon. 6. If the Reverse Threshold requires adjustment press either the ‘minus’ icon to reduce the N voltage or the ‘plus’ icon to increase the N voltage. The lower the value (a value closer to the Neutral Voltage value), the quicker the system will react to reverse direction movement. Once the desired setting is achieved, press the ‘Check Mark’ to accept the change and confirm proper machine operation. Scroll to Exit and press the ‘Check Mark’ twice. T20 Service Information (5-2017) 5. To increase the Low Setting Down Pressure for the Main Scrub Brushes, press the ‘Plus’ icon to increase the mA setting for the control valve. To decrease the pressure, press the ‘Minus’ icon to decrease the mA setting for the control valve. Each time an icon is pressed, the electrical signal to the solenoid is changed. This electrical signal is measured in mA (milliamperes). 155 SERVICE 11. To exit the Down Pressure Adjust Modes, press the Right Arrow until you see Exit DP Adjust. Press the ‘Check Mark’ two times to exit this mode. 12. To exit the Service Modes, turn off the key switch and then turn it on again. 6. Press the ‘Check Mark’ icon to move backwards, then the ‘Right Arrow’ to move to the M: (Medium Down Pressure Setting) then press the ‘Check Mark’ to allow you to set the Medium down pressure setting, if desired. 7. Press the ‘Check Mark’ icon to move backwards, then the ‘Right Arrow’ to move to the H: (High Down Pressure Setting) then press the ‘Check Mark’ to allow you to set the High down pressure setting, if desired. 8. Press the ‘Check Mark’ icon to move backwards, then the ‘Right Arrow’ to move to move to Main Scrub Exit. 9. Press the ‘Check Mark’ icon to Exit the Main Scrub Down Pressure Setting Mode. 10. Press the ‘Right Arrow’ icon to move to the Side Scrub Brush Down Pressure Adjust Mode. Follow the same process as above to make adjustments to the Side Scrub Brush Down pressure, if desired. NOTE: Refer to the ‘Default Down Pressure List’ below, for the factory default down pressure settings. DEFAULT DOWN PRESSURE LIST Note: There is a low limit of 100mA and a high limit of 950mA for each brush pressure setting. Main Scrub Brushes: • Disk Low Pressure Default Setting, 358mA. • Disk Medium Pressure Default Setting, 458mA. • Disk High Pressure Default Setting, 548mA. • Cyl. Low Pressure Default Setting, 340mA. • Cyl. Medium Pressure Default Setting, 440mA. • Cyl. High Pressure Default Setting, 530mA. Side Scrub Brush: • Low Pressure Default Setting, 600mA. • Medium Pressure Default Setting, 675mA. • High Pressure Default Setting, 730mA. 156 T20 Service Information (5-2017) SERVICE MEMBRANE TEST MODE 1. Enter the Service Mode (See SERVICE MODE) and press the right arrow to scroll to the MEMBRANE TEST MODE screen. 2. To enter the MEMBRANE TEST MODE, press the ‘Check Mark’ icon. 3. The MEMBRANE TEST MODE allows you to test the touch button functions, on the control panel. When you are in the Membrane Test Mode, you are directed to press each Membrane Button to test it’s functionality. 4. When you press a button as directed, if the button functions properly, you will be directed to press another button. Note: If you delay pressing the requested button too long, you may see a ‘FAILED’ message displayed. If this happens, restart the testing procedures. If a button fails to function as designed, you will receive the message ‘FAILED’ in the display window. 5. To exit the Service Modes, turn off the key switch and then turn it on again. T20 Service Information (5-2017) 157 SERVICE MEMBRANE PANEL SERVICE MODES SERVICE MODE 3. When you see the mode you want to enter, press the Orange Down Pressure Button to enter that mode. The Service Modes are designed for Service Technician use only. A qualified Service Technician can interface with the machine to configure the machine and to test specific components. 1. Hold the Right Arrow next to the display down and turn the key switch on. Continue to hold the Right Arrow down until you see the message ‘Manual Mode’. Note: The image below is the first message displayed when you enter the Manual Mode. 4. After the key switch is turned off, the machine will return to ‘Normal Mode’ when the key is turned on again. 2. You can continue to press the right arrow until you see the mode you want to enter. The available modes are: • • • • • • • Manual Mode Configure Mode Self Test Mode Input Display Throttle Adjust Down Pressure Adjust Membrane Test 158 T20 Service Information (5-2017) SERVICE MANUAL MODE 1. Enter the Service Mode (See SERVICE MODE) and if needed, press the right arrow to scroll to the ,MANUAL MODE screen. 2. To enter the Manual Mode, press the ‘Orange Down Pressure Button’ . 3. The first Component displayed in Manual Mode is the Hydraulic Enable Valve. It is turned off so there is 0000mA being delivered to the solenoid valve. 4. To turn on the Hydraulic Enable solenoid valve, press the Orange Down Pressure Button. 6. With the current component turned off, you can advance to another component by pressing the right arrow. 7. There are many components that can be turned on and off, so testing can be done. • • • • • • • • • • • • • • • • • • • • • • • • • • • • • M01: Hyd Enable = Hydraulic Enable M02: MB Down Act = Main Brush Down Actuator M03: MB ON Motor = Main Brush Motor ON M04: MB DP PWM = Main Brush Down Pressure M05: MB WaterVlv - Main Brush Water Valve M06: SB Ext. Act = Side Brush Extend Actuator M07: SB Down Act = Side Brush Down Actuator M08: SB ON Motor = Side Brush Motor ON M09: SB DP PWM = Side Brush Down Pressure M10: SB WaterVlv = Side Brush Water Valve M11: Water Vac = Water Vacuum M12: Dust Vac = Dust Vacuum M13: Squeegee Act = Squeegee Actuator M14: Hopper Valve1 -= Hopper Valve 1 M14: Hopper Valve2 = Hopper Valve 2 M15: Hp Latch = Hopper Latch M16: Hp Door = Hopper Door M17: Shaker - Shaker M18: Reverse = Reverse Sensor M19: Shutdown = Shutdown Relay M20: Alarm = Alarm M21: Horn = Horn M22: Det Pump = Detergent Pump M23: Alt Pump = Alternate Pump M24: AltHighFlow = Alternate High Flow M25: AltSideBrush = Alternate Side Brush M26: Sol AutoFill = Solution Auto Fill M27: Rec AutoFill = Recovery Auto Fill M28: Engine Speed = Engine RPM Note: If a component is not installed on the machine, the message ‘Not Installed’ is displayed. 5. When a component is turn on, the amperage being output to that component, or the RPM of that component is displayed and testing can be done. T20 Service Information (5-2017) 8. To Exit Manual Mode, press the right arrow until you see ‘Exit Manual Mode’, then press the Orange Down Pressure Button Twice, or turn off the key switch. 159 SERVICE CONFIGURATION MODE Configuration Mode is an onboard diagnostic utility that configures controller software to operate optional equipment and to electronically adjust certain output functions. 1. Enter the Service Mode (See SERVICE MODE) and press the right arrow to scroll to the CONFIG MODE screen. 2. To enter the CONFIG MODE, press the Orange Down Pressure Button’. 6. Press the ‘right arrow until the correct Alternate Solution’ is displayed and press the Orange Down Pressure Button to accept the change. The Alternate Solution Options are: • • • • None EcH2O ES FaST Choose the option that is installed on the machine. 3. The C1: MainBrushHead choice feature is used on the T20 machines. You can choose Disk or Cylindrical Scrub Head Type.. 4. Press the right arrow to scroll to the next configuration option, in this example we will explore setting the ‘Alternate Solution Options’. 5. Press the ‘Orange Down Pressure Button’ to allow changing the Alternate Solution setting. 7. To configure other options on the machine, continuously press the right arrow to scroll to the desired configuration option and press the ‘Orange Down Pressure Button ’ to choose that option and adjust the settings. The configuration options are: • • • • • • • • C1: MainBrushHead = Scrub Head Type C2: Alt Solution = Alternate Solution C5: Side Brush = Side Brush Type C6: Seat Switch = Seat Switch Installed? C7: Water Level = Solution Flow Rate C8 IRIS Module = IRIS Module Installed? C9: Run-In. Mode = End of Line Factory Use C10: Neut. Scrub = Neutral Scrub Enabled? Additional Water Level Setting Information: There are three water level range setting options. • Economy • Normal • Heavy When a settings is chosen, the operator can adjust three flow rate settings within that range. 8. After all of the ‘Configuration’ settings have been made. Press the right arrow until you see ‘Exit Configuration Mode’, then press the Orange Down Pressure Button Twice, or turn off the key switch. 160 T20 Service Information (5-2017) SERVICE SELF TEST MODE Self Test Mode is an onboard diagnostic utility that tests for open or shorted output circuits. Once completed, open and/or shorted output faults, are displayed. 1. Enter the Service Mode (See SERVICE MODE) and press the right arrow to scroll to the SELF TEST MODE screen. 2. To enter the SELF TEST MODE, press the ‘Orange Down Pressure Button’. If there are no other faults found or no faults found initially, ‘Self Test End’ is displayed. Pressing the right arrow again will display any faults found again. All successful tests performed will result in the message ‘Done’. This indicates that test passed. If a fault is found during the ‘Self Test’ , either ‘Open’ or ‘Short’ will be displayed for that test. “Open” (Indicates current could not be delivered to that circuit). There is an Open Load. “Short” (The current draw is over the threshold, indicating a short circuit) Follow the diagnostic steps in this manual for diagnosing an open or shorted circuit. 6. To exit the self test mode, turn off the machine key. The machine will return to normal operational mode when the key switch is turned on again. 3. The self test will automatically begin. CAUTION: Many of the machine functions will automatically turn on. Stay clear of the machine during the self test. These are a few examples of the tests performed during the Self Test process. The table on the next page shows all of the test names and descriptions. • • • • • Test Hydraulic Enable Valve Test Main Brush Down Actuator Test Main Brush Motor Test Main Brush PWM Valve Test Main Brush Water Valve Some of the tests listed will only be performed if the machine has that specific option and it is configured correctly. 4. When the self test is completed, faults found will be displayed as an open or shorted load. 5. If faults exist, continually press the right arrow icon to display all faults found. T20 Service Information (5-2017) 161 SERVICE Self Test Name: Test Description: 1:Enable Hydraulic Valve Test the valve which enables machine hydraulics. 2:MBrush Down Actuator Tests the valve which controls ‘Main Brush Down’ actuation. 3:MBrush Motor... Tests the valve which controls the Main Brush motor 4:MBrush PWM Valve Tests PWM control of the Main Brush Down valve (for down pressure control). 5:MBrush Water Valve Tests the valve which controls solution delivery to the Main Brush. 6:SBrush Down Actuator Tests the valve which controls ‘Side Brush Down’ actuation. 7:SBrush Ext Actuator Tests the valve which controls ‘Side brush Extension’ actuation. 8:SBrush Motor... Test the valve which controls the Side Brush motor. 9:SBrush PWM Valve Tests PWM control of the Side Brush Down valve (for down pressure control). 10:SBrush Water Valve Tests the valve which controls solution delivery to the Side Brush 11:Scrub Vacuum Fan Tests the vacuum fan for the scrub subsystem (‘water pickup fan). 12:Sweep Vacuum Fan Tests the vacuum fan for the sweep subsystem. 13: Squeegee Actuator Tests the valve which controls the Squeegee Actuator. 14: SolTnk AF Tests the Autofill valve for the Solution Tank. (If Equipped) 15:RecTnk AF Tests the Autofill valve for the Recovery Tank. (If Equipped) 16:Reverse Relay Tests the relay for reverse driving. 17:Shaker Relay Tests the relay for the filter shaker. 18:Horn Horn test. 19:Alarm Backup alarm test. 24:Detergent Pump Tests the detergent pump. 25:Alt Pump Tests the Alternative Solution pump (FAST). (If Configured) 26:Alt High Flow Tests the High Flow Rate function of FAST. (If Configured) 27:Alt Side Brush Tests the valve which controls alternative solution (FAST/ECH2O) to the Side Brush. (If Configured) 28:Shutdown Relay Tests the emergency engine shutdown relay. 162 T20 Service Information (5-2017) SERVICE INPUT DISPLAY MODE Input Display Mode is an onboard diagnostic utility that displays controller input conditions. Input Display Mode displays text messages for hard-wired switch, sensor, and touch panel button inputs. 1. Enter the Service Mode (See SERVICE MODE) and press the right arrow to scroll to the INPUT DISPLAY MODE screen. • • • • I22: Throttle I23: Fuel Sender I24: Hyd Temp Exit 4. To Exit the Input Display Mode, press the right arrow until you see ‘Exit Input Display Mode’, then press the Orange Down Pressure Button Twice, or turn off the key switch. 2. To enter the INPUT DISPLAY MODE, press the ‘Orange Down Pressure Button’. 3. The display will indicate the switch or sensor being tested. When the position of the switch or the state of the sensor is changed, the results of that change is displayed. The components that can be tested with Input Display Mode Include: • • • • • • • • • • • • • • • • • • • • • I1: SolTnk Empty I2: SolTnk Full I3: RecTnk Full I4: RedTank 1/2Full I5: Clogged HpFlt I6: CloggedHydFlt I7: ThermalSentry - Hopper Fire I8: Seat Switch I9: Brake Switch I10: HighEngTemp I11: Low Oil Psr I12: Check Engine I13: EcH2o Green I14: EcH2o Red I15: Hp Position I16: FilterShaker I17: Hp Up Rocker I18: HPDownRocker I19: HpDoor Open I20: HPDoor Close I21: Alternator T20 Service Information (5-2017) 163 SERVICE THROTTLE ADJUST MODE 1. Enter the Service Mode (See SERVICE MODE) and press the right arrow to scroll to the THROTTLE ADJUST MODE screen. 2. To enter the THROTTLE ADJUST MODE, press the ‘Orange Down Pressure Button’. Note: the ‘C’ indicates the Current voltage value and the ‘N’ indicates the New voltage value you are setting. 5. Press the ‘minus’ icon to reduce the N (New) value and the ‘Positive’ icon to increase the N value. The higher the Forward THR value, the quicker the system will react to forward direction movement. Press the Orange Down Pressure Button’ to make your ‘N’ New value the ‘C’ Current value. 3. The actual ‘Neutral Voltage’ value of the throttle position sensor is displayed. Pressing the ‘Orange Down Pressure Button’ sets the Forward and Reverse sense voltage values, based on this Neutral Voltage value. 6. Press the right arrow to proceed to the Reverse Threshold voltage value. The machine operation should be tested to confirm the rear squeegee raises and lowers at the proper times when the machine is propelled forward and backward. 7. If the Reverse Threshold requires adjustment press either the ‘minus’ icon to reduce the N voltage or the ‘plus’ icon to increase the N voltage. 4. If the rear squeegee raises and lowers too soon or too late, you will need to adjust the Forward voltage value and/or the Reverse voltage value. Press the right arrow to proceed to the Forward Threshold voltage value. The lower the value, the quicker the system will react to reverse direction movement. Once the desired setting is achieved, press the ‘Check Mark’ to accept the change and confirm proper machine operation. 8. To Exit the Throttle Adjust Mode, press the right arrow until you see ‘Exit Throttle Adjust Mode’, then press the Orange Down Pressure Button Twice, or turn off the key switch. 164 T20 Service Information (5-2017) SERVICE DOWN PRESSURE ADJUST MODE 1. Enter the Service Mode (See SERVICE MODE) and press the right arrow to scroll to the DOWN PRESSURE ADJUST MODE screen. 2. To enter the DOWN PRESSURE ADJUST MODE, press the ‘Orange Down Pressure Button’. 3. To enter the DOWN PRESSURE ADJUST MODE for the Main Scrub Brushes, press the ‘Orange Down Pressure Button’ , again. 4. To enter the ‘L’ (Low Down Pressure Setting Mode) for the Main Scrub Brushes, press the ‘Orange Down Pressure Button’ , again. Note: The electrical signal transmitted to the control solenoid is measured in mA (milliamperes). 5. To increase the Low Setting Down Pressure for the Main Scrub Brushes, press the ‘Plus’ icon to increase the mA setting for the control valve. To decrease the pressure, press the ‘Minus’ icon to decrease the mA setting for the control valve. Each time an icon is pressed, the electrical signal to the solenoid is changed. 6. To allow adjustment to the Medium down pressure setting, press the ‘Orange Down Pressure Button’ to move backwards, then the ‘Right Arrow’ to move to the M: (Medium Down Pressure Setting) then press the ‘Orange Down Pressure Button’ to allow you to set the Medium down pressure setting, if desired. 7. To allow adjustment to the High down pressure setting, press the ‘Orange Down Pressure Button’ to move backwards, then the ‘Right Arrow’ to move to the H: (Heavy Down Pressure Setting) then press the ‘Orange Down Pressure Button’ to allow you to set the Heavy down pressure setting, if desired. 8. When all down pressure adjustments are completed for the Main Scrub Brushes, press the ‘Orange Down Pressure Button’ to move backwards, then the ‘Right Arrow’ to move to the Main Scrub Exit. 9. Press the ‘Orange Down Pressure Button’ to Exit the Main Scrub Down Pressure Setting Mode. 10. Press the ‘Right Arrow’ button to move to the Side Scrub Brush Down Pressure Adjust Mode. Follow the same process as above to make adjustments to the Side Scrub Brush Down pressure, if desired. You can press the ‘Right Arrow’ button again to move to the Main Sweeping Brush Down Pressure Adjust Mode and again for the Side Sweeping Brush Down Pressure Adjust Mode. Note: With the setting numbers displayed for the Low main Scrub Brush Pressure adjustments can be made to that setting. T20 Service Information (5-2017) Follow the same adjustment procedures outlined for the Main Scrub Brush Down Pressure Settings. NOTE: The factory default down pressure settings are shown in the list below. 165 SERVICE Default Down Pressure List: Note: There is a low limit of 100mA and a high limit of 950mA for each brush pressure setting. Main Scrub Brushes: • Disk Low Pressure Default Setting, 358mA. • Disk Medium Pressure Default Setting, 458mA. • Disk High Pressure Default Setting, 548mA. • Cyl. Low Pressure Default Setting, 340mA. • Cyl. Medium Pressure Default Setting, 440mA. • Cyl. High Pressure Default Setting, 530mA. Side Scrub Brush: • Low Pressure Default Setting, 600mA. • Medium Pressure Default Setting, 675mA. • High Pressure Default Setting, 730mA. 11. To exit the Down Pressure Adjust Modes, press the Right Arrow until you see Exit DP Adjust. Press the ‘Orange Down Pressure Button’ twice to exit this mode. 12. To exit the Service Modes, turn off the key switch and then turn it on again. 166 T20 Service Information (5-2017) SERVICE MEMBRANE TEST MODE 1. Enter the Service Mode (See SERVICE MODE) and press the right arrow to scroll to the MEMBRANE TEST MODE screen. 5. If a button fails to function as designed, you will receive the message ‘FAILED’ in the display window. 2. To enter the MEMBRANE TEST MODE, press the ‘Orange Down Pressure Button’. 6. To exit the Service Modes, turn off the key switch and then turn it on again. 3. The MEMBRANE TEST MODE allows you to test the touch button functions, on the control panel. When you are in the Membrane Test Mode, you are directed to press each Membrane Button to test it’s functionality. NOTE: If you delay too long prior to pressing the required button, this delay may be reported with a ‘Failed’ message, in the display. If this happens, turn off the key switch and restart all Membrane testing procedures. 4. When you press a button as directed, if the button functions properly, you will be directed to press another button until all button tests are completed. If all of the tests were completed successfuly, you will receive the message ‘Passed’ in the display window. T20 Service Information (5-2017) 167 SERVICE FRONT TIRE AND WHEEL SUPPORT 4. Remove the cotter pin and slotted nut from the front wheel drive motor shaft. The front wheel support pivots the front wheel. The support has one grease fitting for the bearings. The front wheel support bearings must be lubricated every 200 hours of operation. Use Lubriplate EMB grease (TENNANT part no. 01433-1). Torque the front wheel nuts to 142 -156 Nm (105 -115 ft. lb.) after the first 50-hours of operation, and every 800 hours thereafter. Torque the front wheel hub nut to (375 ft. lb.). 5. Use a puller to remove the drive hub from the tapered shaft of the drive motor. 6. Remove and plug the hydraulic hoses leading to the front wheel drive motor. 7. Remove the four drive motor mounting bolts. TO REPLACE FRONT DRIVE MOTOR FOR SAFETY: Before Leaving Or Servicing Machine; Stop On Level Surface, Set Parking Brake, Turn Off Machine And Remove Key. 1. Engage parking brake, block rear tires. 2. Jack up front of machine. Use jack stands to support machine. FOR SAFETY: Block machine tires before jacking machine up. Jack machine up at designated locations only. Block machine up with jack stands. 8. Slide the motor out of front wheel housing. 3. Remove the front tire and wheel assembly. 168 T20 Service Information (5-2017) SERVICE NOTE: Observe hydraulic cleanliness requirements when opening hydraulic lines. 9. Remove the hydraulic fittings from the old motor and install in the new motor in the same orientation. 10. Slide the new motor in the front wheel housing. Note the orientation of the motor. 11. Reinstall the four socket-head screws. Torque to 90 - 117 Nm (70 - 85 ft lb). 12. Reconnect the hydraulic hoses to the drive motor. NOTE: Make sure the square key is in place on the shaft of the new motor. 13. Mount the drive hub to tapered motor shaft. Tighten slotted nut to 500 Nm (375 ft. lb). Install the cotter pin. 14. Install the front tire. Torque the front wheel nuts to 142 - 156 Nm (105 -115 ft. lb). 15. Remove jack stands and lower machine. 16. Operate the machine and check the front drive motor for any leaks. T20 Service Information (5-2017) 169 SERVICE 170 T20 Service Information (5-2017)
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