M20 / M30 Service Manual (S/N 008000 ) Tennant Rider Floor Sweeper Scrubber Sn Up

2018-06-12

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M20/M30
(S/N 008000-

)

Sweeper Scrubber
Service Manual

ES® Extended Scrub System
Tennant True® Parts
IRIS® a Tennant Technology
Pro-Panel™ Controls
Insta-Fit™ Adapter

North America / International
For the latest Parts Manuals and other
language Operator Manuals, visit:
www.tennantco.com/manuals

9016006
Rev. 01 (03-2017)

*9016006*

INTRODUCTION
This manual is furnished with each new model. It provides necessary operation and maintenance instructions.
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, used components such
as batteries and fluids in an
environmentally safe way
according to local waste disposal
regulations.
Always remember to recycle.

MACHINE DATA
Please fill out at time of installation for future
reference.
Model No. -
Serial No. -
Installation Date -

INTENDED USE
The M17 is an industrial rider machine designed to wet scrub and sweep both rough and smooth hard surfaces (concrete, tile, stone, synthetic, etc).
Typical applications include schools, hospitals / health care facilities, office buildings, and retail centers. Do not use this machine on soil, grass,
artificial turf, or carpeted surfaces. This machine is intended for indoor use only. This machine is not intended for use on public roadways. Do not use
this machine other than described in this Operators Manual.

Tennant Company
PO Box 1452
Minneapolis, MN 55440
Phone: (800) 553-8033 or (763) 513-2850
www.tennantco.com
DFS (Dual Force Sweeping), PerformanceView, Pro-ID, Pro-Check, Perma-Filter, ShakeMax, Zone Settings, SmartRelease, QA Controls, 1−Step,
Dura−Track, Touch−N−Go, Duramer, are trademarks of Tennant Company.
Specifications and parts are subject to change without notice.
Original Instructions, copyright © 2017 TENNANT Company, Printed in U.S.A.

CONTENTS

Contents............................................................. 3
Specifications..................................................... 7
M30 General Machine Dimensions /
Specifications............................................... 7
M20 General Machine Dimensions /
Specifications............................................. 12
Electrical Component Locator.......................... 17
M Series Electrical Component Locator......... 17
Electrical........................................................... 32
Electrical Schematic Symbols........................ 32
Electrical Option Components........................ 33
Key Power Distribution............................... 34
Key Power Distribution............................... 35
Key On Power Distribution.......................... 36
Main Brushes On........................................ 37
Hopper Lift.................................................. 38
Hopper Lower............................................. 39
Scrub Vacuum Fan On & Squeegee
Down....................................................... 40
Hopper Door Open..................................... 41
Side Brush On............................................ 42
Side Brush On............................................ 43
Shaker Motor On........................................ 44
Solution & Recovery Float Switches........... 45
Forward Propel........................................... 46
Auto Fill Solenoids...................................... 47
Conventional Detergent Pump &
Es Pump.................................................. 48
Horn............................................................ 49
Hopper Door Closed................................... 50
Reverse Propel........................................... 51
Shutdown Relay (Normal Machine
Operation)............................................... 52
Shutdown Relay (Normal Machine
Operation)............................................... 53
Shutdown Relay (Shutdown Mode)............ 54
Shutdown Relay (Shutdown Mode)............ 55
Starting System On..................................... 56
Starting System On..................................... 57
Glow Plugs On............................................ 58
Conventional Main & Side Brush
............................................Solution Valves....
59
Fast System On.......................................... 60
Fuel Level Sensor (Gas / Lp / Diesel)......... 61
Impact, Hydraulic Temperature & Filter
Sensors................................................... 62
Engine Oil Pressure, Temperature,
And Mil System....................................... 63

M20/M30 9016006 - 3-2017

Engine Oil Pressure And
Temperature Sensor................................ 64
Fuel Pump And Speed Control Output....... 65
Fuel Pump.................................................. 66
Engine Speed Control................................. 67
M_series Enable / Disable Chart................ 68
M_series Control Board Connectors........... 69
M_series Fault Condition Chart.................. 70
M_series Condition And Warning
Indicators................................................. 71
General Information.................................... 73
M20_m30 Operational Matrix..................... 75
M20_m30 Option Components................... 76
M20_m30 Hydraulic Component
Locator Side Brush Motor Sweep Fan Motor - Scrub Fan Motor
Propel Motor - Main Brush Motor Side Sqeegee Lift Cylinder...................... 77
M20_m30 Hydraulic Component
Locator Hopper Cylinder - Scrub
Head Cylinder - Side Brush Extend
Cylinderside Squeegee Cylinder Main Brush Motor.................................... 78
M20_m30 Hydraulic Component
Locator Sweep Fan Valve - Scrub Manifold Sweep Manifold....................................... 79
M20_m30 Hydraulic Component
Locator Steering Cylinder Hopper Door Cylinder - .......................... 80
Rear Squeegee Lift Cylinder....................... 80
M20_m30 Hydraulic Component
Locator Hose Group - Steering
And Propel.............................................. 81
M20_m30 Hydraulic Component
Locator Hose Group - Pump And
Vacuum Fan............................................ 82
M20_m30 Hydraulic Component
Locator Hose Group - Brush
And Hopper............................................. 83
M20_m30 Hydraulic Component
Locator Hose Group - Squeegee Lift...... 84
M20_m30 Scrub/Sweep Head Lower......... 85
M20_m30 Scrub/Sweep Head Lift.............. 86
M20_m30 Squeegee Lower........................ 87
M20_m30 Squeegee Lift............................. 88
M20_m30 Main Brushes On....................... 89
M20_m30 Side Brush On........................... 90
M20_m30 Scrub Vacuum Fan On.............. 91

CONTENTS
M20_m30 Scrub Vacuum Fan &
Side Brush On......................................... 92
M20_m30 Scrub Vacuum Fan On.............. 93
M20_m30 Scrub Vacuum Fan &
Side Brush On......................................... 94
M20_m30 Pressure Washer On................. 95
M20_m30 Hopper Lift................................. 96
M20_m30 Hopper Lower............................ 97
M20_m30 Hopper Door Open.................... 98
M20_m30 Hopper Door Close.................... 99
M20_m30 Side Brush Lower.................... 100
M20_m30 Side Brush Lift......................... 101
M20_m30 Side Brush Extend................... 102
M20_m30 Side Brush Retract................... 103
Hydraulic Solenoid Valve Details.............. 104
M20_m30 Fault Codes
(Propanel And Standard Panel)............ 105
M Series Maintenance...............................112
Troubleshooting.............................................. 147
M20/M30 Membrane Panel Service Modes. 147
Service Mode ........................................... 147
Manual Mode............................................ 148
Configuration Mode.................................. 149
Additional Water Level Setting
Information:........................................... 150
Self Test Mode.............................................. 150
Throttle Adjust Mode................................. 152
Down Pressure Adjust Mode.................... 154
Membrane Test Mode............................... 155
Service Mode............................................ 156
M20/M30 Propanel Service Modes........... 157
Configuration Mode.................................. 158

M20/M30 9016006 - 3-2017

CONTENTS

M20/M30 9016006 - 3-2017

CONTENTS

M20/M30 9016006 - 3-2017

SPECIFICATIONS
SPECIFICATIONS
M30 GENERAL MACHINE DIMENSIONS / SPECIFICATIONS
M30 GENERAL MACHINE DIMENSIONS/CAPACITIES
Item
Length
Height
Height (with overhead guard)
Width/frame (roller to roller)
Width (rear squeegee)
Width (with side brush)
Cleaning path width (Main brush length)
Cleaning path width (with scrubbing side brush)
Cleaning path width (with sweeping side brush)
Main brush diameter (2)
Side brush diameter (scrubbing)
Side brush diameter (sweeping)
Solution tank capacity
Recovery tank capacity
Debris hopper volume capacity
Debris hopper weight capacity
Dump height (variable to)
Minimum ceiling dump height
Weight - empty
GVWR
Transport ground clearance
Protection Grade

Dimension/Capacity
2745 mm (108 in)
1475 mm (58 in)
2135 mm (84 in)
1475 mm (58 in)
1500 mm (59 in)
1625 mm (64 in)
1220 mm (48 in)
1575 mm (62 in)
1625 mm (64 in)
305 mm (12 in)
410 mm (16 in)
535 mm (21 in)
284 L (75 gallons)
360 L (95 gallons)
198 L (7.0 ft3)
295 kg (650 lbs)
1525 mm (60 in)
2620 mm (103 in)
1815 Kg (4000 lbs)
2449 Kg (5400 lbs)
80 mm (3 in)
IPX3

Values determined as per IEC 60335- 2- 72
Sound pressure level LpA
Sound uncertainty KpA
Sound power level LWA + Uncertainty KWA
Vibration - Hand- arm
Vibration - Whole body

Measure
84 dB(A)
3.0 dB(A)
106 dB(A)
< 2.5 m/s@
< 0.5 m/s@

M20/M30 9016006 - 3-2017

SPECIFICATIONS
M30 GENERAL MACHINE DIMENSIONS / SPECIFICATIONS - (CONTINUED)

M30 POWER TYPE
Engine
Mitsubishi 2.0

Type
Piston

Ignition
Coil @ Plug

Displacement
1997 cc (122 cu in)
Fuel
Gasoline, 87 octane
minimum, unleaded
Fuel tank: 42 L (11.2 gal)
LPG,
Fuel tank: 15 kg (33 lb)
Idle speed, no load
1350 + 50 rpm
Spark plug gap

Engine
Kubota V1505- TB

Cycle
4

Aspiration
Natural

Cylinders
4

Tennant machine governed net
power
37.3 kw (50 hp) @ 2300 rpm
Cooling system
Water/ethylene glycol
antifreeze
Total: 7.5 L (2 gal)
Radiator: 3.8 L (1 gal)
(Fast) governed speed, under load
2300 + 50 rpm
Valve clearance, cold

Bore
Stroke
85 mm
88 mm (3.46
(3.35 in)
in)
Engine mfg un- governed
net power
44.7 kw (60 hp) @
30
00 rpm
Electrical system
12 V nominal
75 A alternator
Firing order
1- 3- 4- 2
Engine lubricating oil with
filter
4.7 L (5 qt) 5W30
SAE- SG/SH

1.1 mm (0.043 in)

No Adjustment
OHC Engine

Type

Ignition

Cycle

Aspiration

Cylinders

Bore

Stroke

Piston

Diesel

Charged /
Turbo

78 mm
(3.07 in)

78.4 mm
(3.08 in)

Displacement

Tennant machine governed net
power

Engine mfg un- governed
net power

1500 cc (91.4 cu in)

25.4 kw (34 hp) @ 2800 rpm

27.2 kw (44.2 hp) @ 3000
rpm

Fuel
Diesel
Fuel tank: 42 L (11.2 gal)
low sulfur fuel content less
than 500ppm only

Cooling system

Electrical system

Water/ethylene glycol
antifreeze

12 V nominal

Total: 7.5 L (2 gal)

37 A alternator

Radiator: 3.8 L (1 gal)

Idle speed, no load

(Fast) governed speed, under load

Engine lubricating oil
without filter

1350 + 50 rpm

2800 + 50 rpm

6 L (6.35 qt) API diesel
classification CF or better

M20/M30 9016006 - 3-2017

SPECIFICATIONS
M30 GENERAL MACHINE DIMENSIONS / SPECIFICATIONS - (CONTINUED)

M30 GENERAL MACHINE PERFORMANCE
Item
Minimum aisle turn
Travel speed forward (maximum)
Travel speed reverse (maximum)
Maximum ramp incline for loading - Empty tanks
Maximum ramp incline for scrubbing
Maximum ramp incline for transporting (GVWR)
Maximum ambient temperature for machine operation
Minimum temperature for operating machine scrubbing functions

Measure
3175 mm (125 in)
12.9 Km/h (8 mph)
4.8 Km/h (3 mph)
18%
10%
14%
43_ C (110_ F)
0_ C (32_ F)

M30 HYDRAULIC SYSTEM
System
Hydraulic reservoir
Hydraulic total

Capacity
38 L (10 gal)
45 L (12 gal)

ISO Grade Viscosity Index
ISO 100 VI 126 or higher

Ambient Air Temperature Ranges
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

M30 STEERING
Type

Power source

Front wheel, hydraulic cylinder and rotary
valve controlled

Hydraulic accessory pump

M30 BRAKING SYSTEM
Type

Operation

Service brakes

Mechanical drum brakes (2), one per rear wheel, cable
actuated

Parking brake

Utilize service brakes, cable actuated

M30 TIRES
Location

Type

Size

Front (1)
Rear (2)

Solid
Solid

150 mm x 460 mm (6 in x 18 in)
127 mm x 460 mm (5 in x 18 in)

M30 FaST SYSTEM
Item

Measure

Solution pump

12 Volt DC, 11A, 0.7 GPM & 1.4 GPM flow (2 speed), 75
psi high- pressure shutdown

Low solution flow rate

2.7 LPM (0.7 GPM)

High solution flow rate
Low concentrate flow rate

5.4 LPM (1.4 GPM)
2.6 CC/Minute (0.085 Liquid Ounces/Minute)

High concentrate flow rate

5.2 CC/Minute (0.17 Liquid Ounces/Minute)

M20/M30 9016006 - 3-2017

SPECIFICATIONS
M30 GENERAL MACHINE DIMENSIONS / SPECIFICATIONS - (CONTINUED)

M30 ec- H2O SYSTEM
Item

Measure

Solution pump

12 Volt DC, 11A, 0.7 GPM & 1.4 GPM flow, (2 speeds), 75 psi
high- pressure shutdown

Solution flow rate

2.65 LPM (0.7 GPM) - Low
5.30 LPM (1.4 GPM) - High

M20/M30 9016006 - 3-2017

SPECIFICATIONS
M30 GENERAL MACHINE DIMENSIONS / SPECIFICATIONS - (CONTINUED)

M30 MACHINE DIMENSIONS

Frame
(roller to roller)
1475 mm (58 in)

Rear
Squeegee
1500 mm
(59 in)

Width
(with side brush)
1625 mm (64 in)

1475 mm
(58 in)

Wheel base
1422 mm
(56 in)
2745 mm
(108 in)

Track
(at rear wheels)
1473 mm
(58 in)

1014751

M20/M30 9016006 - 3-2017

SPECIFICATIONS
M20 GENERAL MACHINE DIMENSIONS / SPECIFICATIONS

M20 SPECIFICATIONS
M20 GENERAL MACHINE DIMENSIONS/CAPACITIES

Item
Length
Height
Height (with overhead guard)
Width/frame (roller to roller)
Width (rear squeegee)
Width (with side brush)
Wheel base

Dimension/capacity
2410 mm (95 in)
1470 mm (58 in)
2120 mm (83.5 in)
1270 mm (50 in)
1300 mm (51 in)
1470 mm (58 in)
1280 mm (50.38 in)

Track
Cleaning path width (Main brush length)
Cleaning path width (with scrubbing side brush)
Cleaning path width (with sweeping side brush)
Main brush diameter (2)
Side brush diameter (scrubbing)
Side brush diameter (sweeping)
Solution tank capacity
Recovery tank capacity
Debris hopper volume capacity
Debris hopper weight capacity
Dump height (variable to)
Minimum ceiling dump height
Weight - empty
GVWR
Transport ground clearance
Protection Grade

1270 mm (50 in)
1020 mm (40 in)
1370 mm (54 in)
1420 mm (56 in)
300 mm (12 in)
410 mm (16 in)
530 mm (21 in)
212 L (56 gallons)
276 L (73 gallons)
110 L (3.9 ft3)
177 kg (390 lbs)
1520 mm (60 in)
2500 mm (98 in)
1497 Kg (3300 lbs)
2359 Kg (5200 lbs)
80 mm (3 in)
IPX3

Values determined as per IEC 60335- 2- 72
Sound pressure level LpA
Sound uncertainty KpA
Sound power level LWA + Uncertainty KWA
Vibration - Hand- arm
Vibration - Whole body

Measure
84 dB(A)
3.0 dB(A)
106 dB(A)
< 2.5 m/s@
< 0.5 m/s@

M20/M30 9016006 - 3-2017

SPECIFICATIONS
M20 GENERAL MACHINE DIMENSIONS / SPECIFICATIONS - (CONTINUED)

M20 GENERAL MACHINE PERFORMANCE
Item
Minimum aisle turn
Travel speed forward (maximum)
Travel speed reverse (maximum)
Maximum ramp incline for loading - Empty tanks
Maximum ramp incline for scrubbing
Maximum ramp incline for transporting (GVWR)
Maximum ambient temperature for machine operation
Minimum temperature for operating machine scrubbing functions

M20/M30 9016006 - 3-2017

Measure
2790 mm (110 in)
12.9 Km/h (8 mph)
4.8 Km/h (3 mph)
18%
14%
18%
43_ C (110_ F)
0_ C (32_ F)

SPECIFICATIONS
M20 GENERAL MACHINE DIMENSIONS / SPECIFICATIONS - (CONTINUED)

M20 HYDRAULIC SYSTEM
System
Hydraulic reservoir
Hydraulic total

Capacity
38 L (10 gal)
45 L (12 gal)

ISO Grade Viscosity Index
ISO 100 VI 126 or higher
ISO 68 VI 155 or higher
ISO 32 VI 163 or higher

Ambient Air Temperature Ranges
19_ C (65_ F) or higher
7 to 43_ C (45 to 110_ F)
16_ C (60_ F) or lower

M20 POWER TYPE
Engine
Mitsubishi 2.0

Type
Piston

Ignition
Coil @ Plug

Aspiration
Natural

Cylinders
4

Displacement

Tennant governed power

2.0 L (122 cu in)

37.3 kw (50 hp) @ 2300 rpm

Fuel
Gasoline, 87 octane
minimum, unleaded
Fuel tank: 42 L (11.2 gal)
LPG,
Fuel tank: 15 kg (33 lb)

Cooling system
Water/ethylene glycol
antifreeze

Idle speed, no load
1350 + 50 rpm
Spark plug gap

Engine
Kubota V1505- B

Cycle
4

Total: 7.5 L (2 gal)
Radiator: 3.8 L (1 gal)
(Fast) governed speed, under load
2300 + 50 rpm
Valve clearance, cold

Bore
Stroke
85 mm
88 mm (3.46
(3.35 in)
in)
Gross intermittent power
per SAE J1995
44.7 kw (60 hp) @
30
00 rpm
Electrical system
12 V nominal
75 A alternator
Firing order
1- 3- 4- 2
Engine lubricating oil with
filter
4.7 L (5 qt) 5W30
SAE- SG/SH

1.1 mm (0.043 in)

No Adjustment
OHC Engine

Type

Ignition

Cycle

Aspiration

Cylinders

Bore

Stroke

Piston

Diesel

Natural

78 mm
(3.07 in)

78.4 mm
(3.09 in)

Displacement

Tennant governed power

Gross intermittent power
per SAE J1995

1500 cc (91.4 cu in)

18.5 kw (24.8 hp) @ 2300 rpm

18.5 kw (24.8 hp) @ 2300
rpm

Fuel
Diesel
Fuel tank: 42 L (11.2 gal)
low sulfur fuel content less
than 500ppm only

Cooling system

Electrical system

Water/ethylene glycol
antifreeze

12 V nominal

Total: 7.5 L (2 gal)

37 A alternator

Idle speed, no load

(Fast) governed speed, under load

Engine lubricating oil
without filter

950 + 50 rpm

2400 + 50 rpm

6 L (6.35 qt)
diesel classification CF or
better

Radiator: 3.8 L (1 gal)

M20/M30 9016006 - 3-2017

SPECIFICATIONS
M20 GENERAL MACHINE DIMENSIONS / SPECIFICATIONS - (CONTINUED)

M20 BRAKING SYSTEM
Type

Operation

Service brakes
Parking brake

Mechanical drum brakes (2), one per rear wheel, cable actuated
Utilize service brakes, cable actuated

M20 TIRES
Location

Type

Size

Front (1)

Solid

140 mm x 460 mm (5.5 in x 18 in)

Rear (2)

Solid

90 mm x 410 mm (3.5 in x 16 in)

M20 STEERING
Type

Power source

Front wheel, hydraulic cylinder, and rotary valve controlled

Hydraulic accessory pump

M20 FaST SYSTEM
Item

Measure

Solution pump

12 Volt DC, 11A, 0.7 GPM & 1.4 GPM flow,
(2 speeds), 75 psi high- pressure shutdown

Low solution flow rate

2.7 LPM (0.7 GPM)

High solution flow rate

5.4 LPM (1.4 GPM)

Low concentrate flow rate

2.6 CC/Minute (0.085 Liquid Ounces/Minute)

High concentrate flow rate

5.2 CC/Minute (0.17 Liquid Ounces/Minute)

M20 ec- H2O SYSTEM
Item

Measure

Solution pump

12 Volt DC, 11A, 0.7 GPM & 1.4 GPM flow,
(2 speeds), 75 psi high- pressure shutdown

Solution flow rate

2.65 LPM (0.7 GPM) - Low
5.30 LPM (1.4 GPM) - High

M20/M30 9016006 - 3-2017

SPECIFICATIONS
M20 GENERAL MACHINE DIMENSIONS / SPECIFICATIONS - (CONTINUED)

M20 MACHINE DIMENSIONS

Frame
(roller to roller)
1270 mm (50 in)

Rear
Squeegee
1300 mm
(51 in)

Width
(with side brush)
1470 mm (58 in)

1470 mm
(58 in)

Wheel base
1280 mm
(50.38 in)
2410 mm
(95 in)

Track
(at rear wheels)
1270 mm
(50 in)

1014751

M20/M30 9016006 - 3-2017

ELECTRICAL COMPONENT LOCATOR
ELECTRICAL COMPONENT LOCATOR

M20/30 - Series Electrical Component Locator

M SERIES ELECTRICAL COMPONENT LOCATOR

Shaker Motor

Hopper Latch
Solenoid SOL-9

Hopper Down
Sense Switch

Recovery Tank
Full Switch S-15

M20/M30 9016006 - 3-2017

ELECTRICAL COMPONENT LOCATOR
M SERIES ELECTRICAL COMPONENT LOCATOR - (CONTINUED)

M20/30 Series Electrical Component Locator

Solution Tank
Switch S-14

Solution Tank
Empty Switch (S-15)

Auto Fill Solenoid
Valves Sol-1 and 2

M20/M30 9016006 - 3-2017

ELECTRICAL COMPONENT LOCATOR
M SERIES ELECTRICAL COMPONENT LOCATOR - (CONTINUED)

M20/30 Series Electrical Component Locator

Battery
Fuse / Relay
Panel
Horn

ES Equipped Machines

Recovery Tank Half
Full Switch S-16

ES (Extended Scrub
Pump

M20/M30 9016006 - 3-2017

ELECTRICAL COMPONENT LOCATOR
M SERIES ELECTRICAL COMPONENT LOCATOR - (CONTINUED)

M20/30 Series Electrical Component Locator

Shaker Motor

Hopper Thermal
Sentry Switch S-9

Sweeper Filter Clogged
Switch S-18
(Viewed Behind Bumper
20

M20/M30 9016006 - 3-2017

ELECTRICAL COMPONENT LOCATOR
M SERIES ELECTRICAL COMPONENT LOCATOR - (CONTINUED)

M20/30 Series Electrical Component Locator

M20/M30 9016006 - 3-2017

ELECTRICAL COMPONENT LOCATOR
M SERIES ELECTRICAL COMPONENT LOCATOR - (CONTINUED)

M20/30 Series Electrical Component Locator
Back of Engine

Cam Sensor

Front of Engine

ECT - Engine Coolant
Temperature Sensor
CKP
Crank Position Sensor

ECM / ECU
Engine Control Module
or module

Back of Engine
22

M20/M30 9016006 - 3-2017

ELECTRICAL COMPONENT LOCATOR
M SERIES ELECTRICAL COMPONENT LOCATOR - (CONTINUED)

M20/30 Series Electrical Component Locator

Back of Engine
CAM Sensor

HEGO 1
Heated Exhaust Gas
Oxygen Sensor

M20/M30 9016006 - 3-2017

Front of Engine

ELECTRICAL COMPONENT LOCATOR
M SERIES ELECTRICAL COMPONENT LOCATOR - (CONTINUED)

M20/30 Series Electrical Component Locator

M20/M30 9016006 - 3-2017

ELECTRICAL COMPONENT LOCATOR
M SERIES ELECTRICAL COMPONENT LOCATOR - (CONTINUED)

M20/30 Series Hydraulic Component Locator

Side Brush Motor

Sweep Fan Motor

Propel Motor

Main Brush
Motor (Rear)
Left Side Squeegee
Lift Cylinder

M20/M30 9016006 - 3-2017

ELECTRICAL COMPONENT LOCATOR
M SERIES ELECTRICAL COMPONENT LOCATOR - (CONTINUED)

M20/30 Series Hydraulic Component Locator

Hopper Lift Cylinder

Scrub Head
Lift Cylinder

Side Brush
Extend Cylinder

Right Side Squeegee
Lift Cylinder
Main Brush
Motor (Front)

Side Brush
Cylinder

M20/M30 9016006 - 3-2017

ELECTRICAL COMPONENT LOCATOR
M SERIES ELECTRICAL COMPONENT LOCATOR - (CONTINUED)

M20/30 Series Hydraulic Component Locator

Hopper Door Cylinder

Side Brush Manifold
SV-8, SV-10, SV-11,
SV-12, PR-1, PR-12, PC-8

Steering Cylinder

Rear Squeegee Lift Cylinder
(Viewed Behind Bumper)

M20/M30 9016006 - 3-2017

ELECTRICAL COMPONENT LOCATOR
M SERIES ELECTRICAL COMPONENT LOCATOR - (CONTINUED)

M20/30 Series Hydraulic Component Locator

Hydraulic Valve SV-1, SV-2, SV-3, SV-4, SV-6, SVC-7, SV-13A,
SVC-14B, SV-15 RV-1, RV-2, OR-1, OR-4, CV-1, PC-1, PC-2,
PC-5, PC-6, PCV-7, G-1,. G-2, G-5, G-6, G-11, C-11

Sweep Fan Valve SV-9

Propel Pump
28

Accessory Pumps
M20/M30 9016006 - 3-2017

ELECTRICAL COMPONENT LOCATOR
M SERIES ELECTRICAL COMPONENT LOCATOR - (CONTINUED)

M20/30-Series Hydraulic Component Locator
Hydraulic Manifold Details
P/N #1072995

SV-1
RV-1
SV-6
SV-7
G-1

RV-2

SV-3

SV-4

G-2

SV-13A
SV-13B

C-4

PC-7
OR-4
SV-15

M20/M30 9016006 - 3-2017

G-11

ELECTRICAL COMPONENT LOCATOR
M SERIES ELECTRICAL COMPONENT LOCATOR - (CONTINUED)

M20/30-Series Hydraulic Component Locator
Hydraulic Manifold Details
P/N #1072997

SV-11
G-8

G-10

SV-11
PR-1
SV-12
PR-2
SV-8

M20/M30 9016006 - 3-2017

ELECTRICAL

M-Series
M20/30Electrical
- Series
ELECTRICAL
Troubleshooting Information

BEFORE CONDUCTING TESTS:

*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.

M20/M30 9016006 - 3-2017
65

ELECTRICAL
ELECTRICAL
ELECTRICAL SCHEMATIC SYMBOLS

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
Lamp
(Light Bulb)

Horn or
Diode
Sensor
Alarm (Variable Resistor)

Component in Position
Other than Normal

Motor

Solenoid
Valve

LED Information

Information Battery Positive
Box
or Positive Output

Fuse

Warning! Component
is Energized

Battery Negative
or Logic Ground

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

Tan

Pink

Brown

Orange

Yellow

Green

Blue

Purple

8
9

Gray
White

1 RED

13 BLK

M20/M30 9016006 - 3-2017

ELECTRICAL
ELECTRICAL 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

(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

SOL-6

Side Brush Water Valve

SOL-7

Side Brush Manifold

Side Brush Lift Cylinder

Side Brush Extend Cylinder

Side Brush Motor

Solution Tank Auto Fill W ater Valve

SOL-1

Recovery Tank Auto Fill W ater Valve

SOL-2

Solution Tank Full Switch

S-14

Recovery Tank Half Full Switch

S-16

Detergent Pump

ES Pump

Spray Hose Pump

Spray Hose Relay

M12

Spray Hose Switch

S-25

notes

If machine has ES option, the following
components will not be on the
machine: FaST W ater Pump, FaST
W ater 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

M20/M30 9016006 - 3-2017
90

ELECTRICAL
Key Power Distribution

M-Series Key Power Distribution

Glow plug,
Conditions: Glow Plug, Key Off,Conditions:
Run, Start Positions
Off

Off

Run

Glow
Plug

key off, run, start positions

Start

Glow
Plug

ACC

Glow Plug Position (Diesel Only)

Off Position

Spring Loaded – Returns to “Off” Unless Held

30
50

Run Position

Off

Run

Glow
Plug

Start

Key Switch

Off

Run

Glow
Plug

Start

Run

Key Switch

ACC

Start Position

Start

Key Switch

Spring Loaded-Returns to “RUN” Unless Held

Switch Terminal Markings
KEY SWITCH POSITION

ACC

GLOW PLUG
OFF

NO CONNECTIONS

RUN
START

i
i
34

“ Indicates a common connection

Common connections in various switch positions should
be less than one (1) ohm resistance.

M20/M30 9016006 - 3-2017

ELECTRICAL
Key Power Distribution

M-Series Key OFF Power Distribution
Conditions: Key off

Conditions: Key Off

12 VDC

1/RED

13/BLK

ALTERNATOR

1/RED

GREEN JUMPER WIRE

30
50
17
19
ACC

M/7B
77/PUR

1/RED

KEY SWITCH

OFF

B+ WHILE CRANKING

START RELAY

1/RED

Right Most Digit
of W ire Number

128 B+

27 (AUX #3)

5 (AUX #2)

6 (AUX #1)

Extra Fused B+

1 (UNSWITCHED B+)

128/GRY

SEE DIODE D-2

Fuse 11

15A

5 / GRN

27 / PUR

Aux. 3 Relay

Aux. 2 Relay

6 / BLU
Aux. 1 Relay

1/RED

Wiring Color Codes

(Unless otherwise marked)

FUSE-2
122/BRN
15A

1/RED

FUSE-3

Color of W ire

Tan

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

25/GRN

15A

!
i
M20/M30 9016006 - 3-2017

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.

ELECTRICAL

M-Series Key ON Power Distribution

Key On Power Distribution

Conditions: Key on, engine off

Conditions: Key On Engine Off

12 VDC

1/RED

13/BLK

ALTERNATOR

1/RED

GREEN JUMPER WIRE

1/RED

ALTERNATOR
LAMP

50
17
19
4

FUSE 1 8

ACC15 AMP

KEY SWITCH

RUN

4 TO FUSES
9 &12

1/RED

M1A

13/BLK

Touch Panel /
Control Board

AUX. 1
RELAY

1/RED

FUSE 5

15 AMP

M1B
1/RED

D-2

SHUTDOWN RELAY
CONTACTS
(Normally CLOSED)
8

M2A

TO FUSE
6

13/BLK

PIN P2-33
PIN P2-1
PIN P2-2

13/BLK

PIN P2-34

13/BLK

PIN P2-35
PIN P1-23

105

STATIC
GROUND

13/BLK

M6C
3

1/RED

AUX. 2
RELAY

TO ENGINE
HARNESS
1/RED 30

M2B

Wiring Color Codes

(Unless otherwise marked)

TO FUSES
7&8

Right Most Digit
of W ire Number

Color of W ire

Tan

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

M20/M30 9016006 - 3-2017

ELECTRICAL

M-Series Main Brushes ON

Main Brushes On

Conditions: Key on, engine running, scrubbing or sweeping system on, propel forward or reverse

Conditions: Key On, Engine Running, Scrubbing or Sweeping System On Propelling
Maximum Amp. Draw Readings

BATTERY
POSITIVE
FROM
AUX 1
RELAY
CONTACTS

FUSE 6

Component

Max Amp Draw

SV-3

1.7 A

SV-6

1.7 A

SV-7

1.7 A

15 AMP

FUSE 5

(SCRUBBING)

PWM

530 mA

625 mA

715 mA

BRUSH HEAD
PRESSURE

MAIN BRUSHES
LOWER

PIN P2-8

PIN P2-4

SV-2
14

Setting SV-10 Amp Draw

ENABLE VALVE

SV-7

15 AMP

Typical Default
Amp Draw Readings (+/- 15%)

Touch Panel / Control Board

PIN P2-5

SV-3
14

Typical Default
Amp Draw Readings (+/- 15%)

MAIN BRUSHES
ROTATE 58

(SWEEPING)
Setting SV-10 Amp Draw

500 mA

540 mA

615 mA

SV-6

Wiring Color Codes

(Unless otherwise marked)

Right Most Digit
of W ire Number

Color of W ire

Tan

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

M20/M30 9016006 - 3-2017

Pressure settings P1, P2, & P3 are the Touch Panel
LED indicators for Brush down pressure.

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.

ELECTRICAL

M-Series Hopper Lift

Hopper Lift

Conditions: Key on, engine running, hopper lift switch activated

BATTERY
NEGATIVE

Conditions: Key On Engine Running, Hopper Lift Switch Activated
BATTERY
POSITIVE
FROM
AUX 1
RELAY
CONTACTS

Touch Panel / Control Board

FUSE 6
15 AMP

SV-7

FUSE 5

15 AMP
Wiring Color Codes

HOPPER POSITION
SWITCH

PIN P2-8
PIN P1-3

13/BLK

S-6

OPEN = UP
CLOSED = DOWN

PIN P2-7

HOPPER
LIFT/LOWER
SWITCH

D-2
HOPPER
LATCH

1/RED
16

15 AMP

FUSE 8

SV-14

TO Unswitched B+

FUSE 7

HOPPER
LIFT

15 AMP
BATTERY
POSITIVE
FROM
AUX 2
RELAY
CONTACTS

ENABLE
VALVE

PIN P1-7
138

PIN P2-32

SOL-9
53

SV-13

HOPPER
LOWER

OFF

PIN P1-8

PIN P2-31

13/BLK

S-5

2 & 4 CLOSED = LIFT
2 & 1 CLOSED = LOWER

(Unless otherwise marked)
Right Most Digit
of WireNumber

Color of Wire

Tan

Component

Max Amp Draw

Pink

Brown

SV-7

1.7 A

Orange

SV-13

1.7 A

Yellow

SV-14

1.7 A

Green

Blue

Purple

Gray

White

HOPPER
LIFT/LOWER
SWITCH
PUSH TO LIFT
HOPPER

Activating the Hopper Lift/Lower Switch will cancel
the sweep or scrub systems and automatically
selects HIGH engine speed.

If hopper is in the full DOWN position when activating
Hopper Lift, the Hopper Lower Valve (SV-13) is
momentarily turned ON to help “jog” the hopper latch.

Hopper Latch Solenoid (SOL-9) is an electromechanical device.

Hopper Latch Solenoid (SOL-9) turns ON for 3 to 5
seconds with each activation of Hopper Lift Switch.
M20/M30 9016006 - 3-2017

ELECTRICAL
Hopper Lower

M-Series Hopper Lower

Key on,
engine
running,
Conditions: Key Conditions:
On, Engine Running,
Hopper
Lower
Switchhopper
Activatedlower switch

BATTERY
NEGATIVE

BATTERY
POSITIVE
FROM
AUX 1
RELAY
CONTACTS

Touch Panel / Control Board

FUSE 6

ENABLE
VALVE

15 AMP

HOPPER DOWN
SENSE SWITCH

PIN P2-8

SV-7
PIN P1-3

FUSE 5

15 AMP

FUSE 8
15 AMP

HOPPER
LATCH

138

S-6

PIN P2-7

HOPPER
LIFT/LOWER
SWITCH

OFF

PIN P1-8
HOPPER
LOWER

PIN P2-32

SOL-9

13/BLK

OPEN = UP
CLOSED = DOWN

PIN P1-7
FUSE 7

SV-14

BATTERY
POSITIVE
FROM
AUX 2
RELAY
CONTACTS

HOPPER
LIFT

15 AMP

activated

PIN P2-31

SV-13

Activating the Hopper Lift/Lower Switch will cancel the sweep or
scrub systems and automatically selects HIGH engine speed.

Hopper Latch solenoid (SOL-9) is an electro-mechanical device.

13/BLK

S-5

1&2 CLOSED = LIFT
2&4 CLOSED = LOWER

Wiring Color Codes

(Unless otherwise marked)

HOPPER
LIFT/LOWER
SWITCH
PUSH TO
LOWER HOPPER

M20/M30 9016006 - 3-2017

Right Most Digit
of WireNumber

Color of Wire

Tan

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

ELECTRICAL

M-Series Scrub Vacuum Fan On & Squeegees Down

Scrub Vacuum Fan On & Squeegee Down

Conditions: Key on, engine running, scrubbing system & scrub vacuum on, propel forward

Conditions: Key On, Engine Running, Scrubbing System & Scrub Vacuum On, Propelling

BATTERY
POSITIVE
FROM
AUX 1
RELAY
CONTACTS
Touch Panel / Control Board

FUSE 6

ENABLE
VALVE

15 AMP

FUSE 5

Color of W ire

SCRUB
VACUUM
FAN ON 56

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

PIN P2-28

SV-1
14

SIDE & REAR
SQUEEGEES
LOWER 59

Tan

PIN P2-8

SV-7

15 AMP
Right Most Digit
of W ire Number

PIN P2-6

SV-4

Reverse propel will turn OFF SV-4 (Pin P2-6) and
raise the side and rear squeegees.

Maximum Amp Draw Readings

Component

Max Amp Draw

SV-1

1.7 A

SV-4

1.7 A

SV-7

1.7 A

Any condition that cancels the scrub functions will
also turn OFF the scrub vacuum fan and raise
squeegees.

M20/M30 9016006 - 3-2017

ELECTRICAL

M-Series Hopper Door Open

Hopper Door Open

Conditions: Key on, engine running, hopper door open switch activated

Conditions: Key On, Engine Running, Hopper Door Open, Switch Activated
BATTERY
POSITIVE
FROM
AUX 1
RELAY
CONTACTS

BATTERY
NEGATIVE

Touch Panel / Control Board

FUSE 6

ENABLE
VALVE

15 AMP

BATTERY
POSITIVE
FROM
AUX 2
RELAY
CONTACTS

PIN P2-8
HOPPER
DOOR
OPEN/CLOSE
SWITCH

SV-7

Component

Max Amp Draw

SV-7

1.7 A

SV-15

1.7 A

PIN P1-9

FUSE 7
15 AMP

1
2

OFF

PIN P1-10
HOPPER
DOOR OPEN 68

PIN P2-15

13/BLK

S-13

2 & 1 CLOSED = DOOR OPEN
2 & 4 CLOSED = DOOR CLOSE

SV-15
HOPPER DOOR
SWITCH
PUSH TO CLOSE
DOOR

Wiring Color Codes

(Unless otherwise marked)
Right Most Digit
of WireNumber

Anytime the Enable Valve (SV-7) is ON and the
Hopper Door Open Valve (SV15) is OFF, the hopper
door will close.

Activating the Hopper Door Switch to open or close
the door will cancel the sweep or scrub systems and
automatically selects HIGH engine speed.

M20/M30 9016006 - 3-2017

Color of Wire

Tan

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

ELECTRICAL

M-Series Side Brush On

Side Brush On

Conditions: Key on, engine running, scrubbing or sweeping system on, side brush on propel
forward or reverse

Conditions: Key On, Engine Running, Scrubbing or Sweeping, Side Brush On, Propelling
BATTERY
POSITIVE
FROM
AUX 1
RELAY
CONTACTS

Touch Panel / Control Board

FUSE 6

ENABLE VALVE

15 AMP
Typical Default
Amp Draw Readings (+/- 15%)

(SCRUBBING)

530 mA

625 mA

715 mA

500 mA

540 mA

615 mA

SIDE
BRUSH DOWN

Component

Max Amp Draw

SV-7

1.7 A

SV-8

1.7 A

SV-11

1.7 A

SV-12

1.7 A

PIN P2-11

PIN P2-12

SV-11
15

SIDE
BRUSH EXTEND

Maximum Amp Draw Reading

(SWEEPING)

SIDE
BRUSH
PRESSURE

SV-10

Typical Default
Amp Draw Readings (+/- 15%)
Setting SV-10 Amp Draw

PIN P2-8

SV-7
PWM

Setting SV-10 Amp Draw

PIN P2-9

SV-12
SIDE
BRUSH RUN

SV-8
Wiring Color Codes

(Unless otherwise marked)

Right Most Digit
of W ire Number

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.

Color of W ire

Tan

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

M20/M30 9016006 - 3-2017

ELECTRICAL

M-Series Side Brush On

Side Brush On

Conditions: Key on, engine running, scrubbing or sweeping system on, side brush on propel
or Side
reverse
Conditions: Key On Engine Running, Scrubbing orforward
Sweeping,
Brush On, Propelling
BATTERY
POSITIVE
FROM
AUX 1
RELAY
CONTACTS

FUSE 6

Component

Max Amp Draw

M3A

200 mA

SV-9

1.7 A

BATTERY
NEGATIVE

Touch Panel / Control Board

SWEEP
VACUUM
FAN RUN

15 AMP

PIN P1-5
63

PIN P2-10

S-9

SV-9

OPEN = BELOW 140°F
CLOSED = ABOVE 140°F

FROM
BATTERY
AUX 2
POSITIVE
RELAY
CONTACTS

PIN P1-16
FUSE 7

15 AMP

122

M3B

BATTERY
NEGATIVE

SHAKER MOTOR
87

Wiring Color Codes 15 AMP
Color of Wire

Tan

Pink

S-18

OPEN = FILTER OK
CLOSED = FILTER CLOGGED

SHAKER
RELAY
13/BLK

STATIC GROUND

(Unless otherwise marked)
Right Most Digit
of WireNumber

CLOGGED
SWEEP FILTER
SWITCH 13/BLK

PIN P2-16

UNSWITCHED
BATTERY
POSITIVE

1/RED FUSE 2

M3A

HOPPER
THERMAL
SENTRY
SWITCH13/BLK

105

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

A short shaker cycle is automatically performed each time the Sweep Vacuum is turned OFF.

If the Hopper Thermal Sentry Switch closes (above 140°F in hopper), all sweep functions are
cancelled.

If Sweep Filter Clogged Switch closes (restriction in filter), a fault condition will be
displayed, but vacuum fan will continue operating normally.

If the shaker system is manually selected when Sweep Vacuum Fan is ON, the fan is turned
OFF during the shaker cycle, and turned back ON when shaker cycle is complete.

M20/M30 9016006 - 3-2017

Hopper Thermal
Sentry Switch

Sweep Filter Clogged
Switch (behind bumper)

ELECTRICAL
Shaker Motor On
Conditions: Key On, ONE-STEP Sweeping Turned Off or Shaker System On

M-Series Shaker Motor On

Conditions: Key on, ONE-STEP sweeping turned off or shaker system on
BATTERY
POSITIVE
FROM
AUX 1
RELAY
CONTACTS

FUSE 6

Component

Max Amp Draw

M3A

200 mA

SV-9

1.7 A

BATTERY
BATTERY
NEGATIVE
NEGATIVE

Touch Panel / Control Board

SWEEP
VACUUM
FAN RUN

15 AMP

PIN P1-5
63

129

PIN P2-10

S-9

SV-9

OPEN = BELOW 140°F
CLOSED = ABOVE 140°F

BATTERY
POSITIVE
FROM
AUX 2
RELAY
CONTACTS

PIN P1-16
5

FUSE 7

15 AMP

M3A

PIN P2-16

S-18

SHAKER
RELAY

1/RED FUSE 2

BATTERY
NEGATIVE

SHAKER
MOTOR

M3B
122

15 AMP

CLOGGED
SWEEP FILTER
SWITCH 13/BLK

OPEN = FILTER OK
CLOSED = FILTER CLOGGED

UNSWITCHED
BATTERY
POSITIVE

Right Most Digit
of WireNumber

HOPPER
THERMAL
SENTRY
SWITCH13/BLK

13/BLK

STATIC GROUND

105

Color of Wire

Tan

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

Wiring Color Codes

(Unless otherwise marked)

Hopper Thermal
Sentry Switch

Sweep Filter
Clogged Switch
(behind bumper)

A short shaker cycle is automatically performed each time the Sweep Vacuum is turned OFF.

If the Hopper Thermal Sentry Switch closes (above 140°F in hopper), all sweep functions are
cancelled.

If Sweep Filter Clogged Switch closes (restriction in filter), a fault condition will be
displayed, but vacuum fan will continue operating normally.

If the shaker system is manually selected when Sweep Vacuum Fan is ON, the fan is turned
OFF during the shaker cycle, and turned back ON when shaker cycle is complete.

M20/M30 9016006 - 3-2017

M-Series Solution & Recovery Float Switches
Conditions: Key on

ELECTRICAL

Solution & Recovery Float Switches
Conditions: Key On

BATTERY
NEGATIVE
Touch Panel / Control Board

SOLUTION TANK
EMPTY SWITCH

PIN P1-11 177

13/BLK

S-19
OPEN = EMPTY
CLOSED = NOT EMPTY

Wiring Color Codes

(Unless otherwise marked)

Right Most Digit
of W ire Number

Color of W ire

Tan

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

PIN P1-12

SOLUTION TANK
FULL SWITCH

13/BLK

S-14
OPEN = NOT FULL
CLOSED = FULL

PIN P1-13

RECOVERY TANK
FULL SWITCH

13/BLK

S-15
OPEN = NOT FULL
CLOSED = FULL

PIN P1-14

RECOVERY TANK
HALF FULL SWITCH

13/BLK

S-16
OPEN = LESS THAN HALF FULL
CLOSED = HALF FULL OR MORE

S-14, SA-15, & S-19 are Float Switches.
S-16 is a Pressure Tube Switch.

M20/M30 9016006 - 3-2017

The Tank Level Switches must be
closed for five (5) seconds before any
output is affected.

ELECTRICAL

M-Series Forward Propel

Forward Propel

Conditions: Key on

Conditions: Key On

BATTERY
NEGATIVE

Touch Panel / Control Board

!
PIN P1-1

Propel Pedal Position Sensor
Arms Adjustment

13/BLK

1
BATTERY POSITIVE
FROM FUSE 5

1.9 VDC OR
LOWER IN
FORWARD

SENSOR
OUTPUT

PROPEL
PEDAL
POSITION
SENSOR

131/BLK-WHT

DIGITAL
GROUND

SENSOR OUTPUT VOLTAGES:
2.0 to 2.7 VDC = NEUTRAL
2.8 VDC OR HIGHER = REVERSE
1.9 VDC OR LOWER = FORWARD

1. Enter Input Diagnostics Mode
2. Loosen sensor arms hardware
3. Tighten top bolt to snug
4. Slide arm until the light goes ON
5. Back arm out until the light goes OFF
6. Retighten all hardware
NOTE: Use the High Engine Speed LED to adjust the arm closest to the
front of machine (forward adjustment), and the Low Engine Speed LED to
adjust the arm closest to the rear of machine (reverse adjustment).

Front
FRONT

Forward
FORWARD
Adjustment
ADJUSTMENT

Front
FRONT

Wiring Color Codes

(Unless otherwise marked)

Right Most Digit
of W ire Number

Color of W ire

Tan

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

Reverse

REVERSE
Adjustment
ADJUSTMENT

M20/M30 9016006 - 3-2017

ELECTRICAL

M-Series Auto Fill Solenoids

Auto Fill Solenoids

Conditions: Key on

Conditions: Key On

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

FUSE 7

SOLUTION
TANK AUTO
FILL VALVE

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

Wiring Color Codes

PIN P1-12
RECOVERY
TANK AUTO
FILL VALVE

(Unless otherwise marked)
Right Most Digit
of W ire Number

Color of W ire

Tan

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

13/BLK

S-14
OPEN = NOT FULL
CLOSED = FULL

PIN P2-14

RECOVERY TANK
FULL SWITCH

SOL-2
PIN P1-13

13/BLK

S-15
OPEN = NOT FULL
CLOSED = FULL

RECOVERY TANK
HALF FULL SWITCH

PIN P1-14

13/BLK

S-16

OPEN = LESS THAN HALF FULL
CLOSED = HALF FULL OR MORE

S-14, S-15, & S-19 are Float Switches.S-16 is a Pressure Tube Switch.

Solution and Recovery Tank Auto Fill solenoids (SOL-1 & 2) are electro-mechanical devices.

Machine must be in neutral and Solution Tank Full Switch OPEN (tank not full) to activate
Solution Tank Auto Fill Valve (SOL-1)..

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).

The Tank Level Switch must be closed for five (5) seconds before any output is affected..

M20/M30 9016006 - 3-2017

ELECTRICAL

M-Series Conventional Detergent Pump & ES Pump

Conventional Detergent Pump & ES Pump

Conditions: Key on, engine running, scrubbing system on, ES system on, two or three solution
LED’s lit

Conditions: Key On, Engine Running, Scrubbing system On, ES System On, 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

SOLUTION TANK
EMPTY SWITCH

PIN P1-11 177
DETERGENT
PUMP
5

FUSE 8

S-19
74

OPEN = EMPTY
CLOSED = NOT EMPTY

PIN P2-21

PWM

15 AMP
Wiring Color Codes

SOLUTION TANK
FULL SWITCH

(Unless otherwise marked)

Right Most Digit
of W ire Number

Color of W ire

Tan

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

13/BLK

PIN P1-12

S-14

ES
PUMP
17

13/BLK

OPEN = NOT FULL
CLOSED = FULL

PIN P2-22

RECOVERY TANK
FULL SWITCH

PIN P1-13

13/BLK

S-15
OPEN = NOT FULL
CLOSED = FULL

RECOVERY TANK
HALF FULL SWITCH

S-14, S-15, & S-19 are Float Switches, S-16
is a Pressure Tube Switch

PIN P1-14

13/BLK

S-16

OPEN = LESS THAN HALF FULL
CLOSED = HALF FULL OR MORE

The Tank Level Switches must be closed for
5 seconds before any output is affected.

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

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.

M20/M30 9016006 - 3-2017

ELECTRICAL

M-Series Horn

Horn
Conditions: Key On, Switch Activated

Conditions: Key on, switch activated

UNSWITCHED
BATTERY
POSITIVE

BATTERY
NEGATIVE

1/RED FUSE 3

HORN

M5B
25

13/BLK

15 AMP
23

HORN
RELAY

M5A

13/BLK

HORN
SWITCH

13/BLK

S-22
OPEN = HORN OFF
CLOSED = HORN ON

Wiring Color Codes

(Unless otherwise marked)

Right Most Digit
of W ire Number

Color of W ire

Tan

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

Horn Location
Membrane Panel

Horn Location
Pro Panel

M20/M30 9016006 - 3-2017

ELECTRICAL

M-Series Hopper Door Closed

Hopper Door Closed
Conditions: Key

on, engine running, hopper door close switch activated

Conditions: Key On, Engine Running, Hopper Door Close Switch Activated
BATTERY
POSITIVE
FROM
AUX 1
RELAY
CONTACTS

BATTERY
NEGATIVE

Touch Panel / Control Board

FUSE 6

ENABLE
VALVE

15 AMP

PIN P2-8
HOPPER
DOOR
OPEN/CLOSE
SWITCH

SV-7

PIN P1-9
BATTERY
POSITIVE
FROM
AUX 2
RELAY
CONTACTS

1
2

OFF

PIN P1-10

FUSE 7
15 AMP

Wiring Color Codes

HOPPER
DOOR OPEN 68

PIN P2-15

13/BLK

S-13

2 & 1 CLOSED = DOOR OPEN
2 & 4 CLOSED = DOOR CLOSE

SV-15

(Unless otherwise marked)
Right Most Digit
of WireNumber

Color of Wire

Tan

Pink

Brown

Component

Max Amp Draw

Orange

Yellow

SV-7

1.7 A

Green

SV-15

1.7 A

Blue

Purple

Gray

White

HOPPER DOOR
SWITCH

Anytime the Enable Valve (SV-7) is ON
and the Hopper Door Open Valve (SV15)
is OFF, the hopper door will close.

Activating the Hopper Door Switch
to open or close the door will cancel
the sweep or scrub systems and
automatically selects HIGH engine
speed.

PUSH TO CLOSE
DOOR

M20/M30 9016006 - 3-2017

ELECTRICAL
Reverse Propel
Conditions: Key On Engine Running, Propel Pedal Pushed for Reverse

M-Series Reverse Propel

Conditions: Key on, engine running, propel pedal pushed for reverse
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

15 AMP

M4A

13/BLK

PIN P2-17

2.8 VDC or
HIGHER in
Reverse

i
PIN P1-1

REVERSE
RELAY

1
14

BATTERY POSITIVE
FROM FUSE 5

BATTERY
POSITIVE
FROM
FUSE 1

SENSOR
OUTPUT

PROPEL
PEDAL
POSITION
SENSOR

131/BLKWHT

DIGITAL
2 GROUND

SENSOR OUTPUT VOLTAGES:
2.0 to 2.7 VDC = NEUTRAL
2.8 VDC OR HIGHER = REVERSE
1.9 VDC OR LOWER = FORWARD

REVERSE ALARM/
WARNING LIGHT

M4B

13/BLK

REVERSE
TAIL LIGHT
20 (RIGHT)

13/BLK

REVERSE
TAIL LIGHT
20 (LEFT)

13/BLK

Wiring Color Codes

(Unless otherwise marked)

i
i

See Forward Propel page for information on
adjusting Propel Pedal Position Sensor.
Reverse propel will turn OFF SV-4 (Pin P2-6) and
raise the side and rear squeegees.

M20/M30 9016006 - 3-2017

Right Most Digit
of W ire Number

Color of W ire

Tan

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

ELECTRICAL

M-Series Shutdown Relay (Normal Machine Operation)

Shutdown Relay (Normal Machine Operation)

- (Gas / LP) -

12 VDC

1/RED

13/BLK

Maximum Amp Draw Readings

1/RED

Component

Max Amp Draw

M6A

200 mA

KEY SWITCH

FUSE 1 8
15 AMP

RUN

13/BLK

M2A
AUXILIARY
RELAY

ENGINE HARNESS
CONNECTORS

8
1/RED

87a

OPEN = MACHINE
SHUTDOWN
CLOSED = NORMAL
OPERATION

AUX. 2 RELAY
CONTACTS

FUSE 7

15 AMP

M6A

TO FUSE 1 OF
ENGINE HARNESS

J-11

SHUTDOWN
RELAY
5

PINK

10
PIN

M6C

M2B

Touch Panel /
Control Board

PIN P2-18

Wiring Color Codes

(Unless otherwise marked)

Right Most Digit
of W ire Number

Color of W ire

Tan

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

The Shutdown system is used to turn OFF the
engine under certain conditions on machines with
certain optional equipment.

When control board turns ON M6A, the engine ECM
loses power, and the engine shuts OFF.

M20/M30 9016006 - 3-2017

ELECTRICAL

M-Series Shutdown Relay (Normal Machine Operation)

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

KEY SWITCH

FUSE 1 8

15 AMP

RUN

13/BLK

M2A
AUXILIARY
RELAY

1/RED

87a

OPEN = MACHINE
SHUTDOWN
CLOSED = NORMAL
OPERATION

M2B

AUX. 2 RELAY
CONTACTS

J-11
A

15 AMP

M6A

TO FUEL PUMP
RELAY M10

ENGINE HARNESS
CONNECTOR

SHUTDOWN
RELAY
FUSE 7

10
PIN

M6C

Touch Panel /
Control Board

PIN P2-18

Wiring Color Codes

(Unless otherwise marked)

Right Most Digit
of W ire Number

Color of W ire

Tan

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

M20/M30 9016006 - 3-2017

The Shutdown system is used to turn OFF the
engine under certain conditions on machines with
certain optional equipment.

When control board turns ON M6A, the engine ECM
loses power, and the engine shuts OFF.

ELECTRICAL

M-Series Shutdown Relay (Shutdown Mode)

Shutdown Relay (Shutdown Mode)

- (Gas / LP) -

12 VDC

1/RED

13/BLK

Maximum Amp Draw Readings

1/RED

Component

Max Amp Draw

M6A

200 mA

KEY SWITCH

FUSE 1

15 AMP

RUN

13/BLK

M2A
AUXILIARY
RELAY

1/RED

ENGINE HARNESS
CONNECTORS

M2B

AUX. 2 RELAY
CONTACTS

87a

TO FUSE 1 OF
ENGINE HARNESS

J-11

OPEN = MACHINE
SHUTDOWN
CLOSED = NORMAL
OPERATION

SHUTDOWN
RELAY
FUSE 7

PINK

10
PIN

M6C

Touch Panel /
Control Board

The Shutdown system is used to turn OFF the
engine under certain conditions on machines with
certain optional equipment.

When control board turns ON M6A, the engine ECM
loses power, and the engine shuts OFF.

15 AMP

M6A

PIN P2-18

Wiring Color Codes

(Unless otherwise marked)

Right Most Digit
of W ire Number

Color of W ire

Tan

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

M20/M30 9016006 - 3-2017

M-Series Shutdown Relay (Shutdown Mode)

Shutdown Relay (Shutdown Mode)

ELECTRICAL

- (Diesel) -

12 VDC

1/RED

13/BLK

Maximum Amp Draw Readings

1/RED

Component

Max Amp Draw

M6A

200 mA
AUXILIARY
RELAY

KEY SWITCH

FUSE 1

13/BLK

M1A

15 AMP

RUN

13/BLK

M2A
AUXILIARY
RELAY

1/RED

M2B
8

AUX. 2 RELAY
CONTACTS

87a

J-11
A

10
PIN

M6C

OPEN = MACHINE
SHUTDOWN
CLOSED = NORMAL
OPERATION

(Unless otherwise marked)
Right Most Digit
of W ire Number

Color of W ire

Tan

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

M20/M30 9016006 - 3-2017

FUSE 7

TO FUEL PUMP
RELAY M10

ENGINE HARNESS
CONNECTOR

SHUTDOWN
RELAY
Wiring Color Codes

Touch Panel /
Control Board

The Shutdown system is used to turn OFF the
engine under certain conditions on machines with
certain optional equipment.

When control board turns ON M6A, the engine ECM
loses power, and the engine shuts OFF.

15 AMP

M6A

PIN P2-18

ELECTRICAL

M-Series Starting System ON

Starting System On

Conditions: Key turned to start position - (Gas / LP) -

Condition: Key Turned To Start Position - (Gas / LP) -

12 VDC

1/RED

13/BLK

ENGINE
BLOCK
RED

STARTER
MOTOR
ASSEMBLY

F6
15 AMP

RED/TAN

ENGINE
BLOCK

WHITE

STARTER
RELAY
1/RED

ENGINE
HARNESS
CONNECTOR

STARTER
RELAY
S1
17

X
4

ACC

KEY SWITCH

START)

M7A

LT.BLUE/
PINK

16
PIN

M7B

P1
F

PINK/BLACK

TO ECM PIN 89

Refer to the Engine
Schematics

13/BLK

Wiring Color Codes

TO FUSES
1, 9, & 12

(Unless otherwise marked)
Right Most Digit
of WireNumber

Color of Wire

Tan

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

M30 9003947 (6--08)

M20/M30 9016006 - 3-2017

ELECTRICAL

M-Series Starting System ON

Starting System On

Conditions: Key turned to start position - (Diesel) -

Condition: Key Turned To Start Position - (Diesel) -

12 VDC

1/RED

13/BLK

ENGINE
BLOCK

1/RED

J-11
77
J

M8A

D-3

1/RED
86

M7A

KEY SWITCH

START

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

M20/M30 9016006 - 3-2017

M9A

SWITCHED BATTERY POSITIVE
FROM SHUTDOWN RELAY M6C

13/BLK

TO BATTERY
NEGATIVE

Tan

TO
GLOWPLUGS

TO FUSES
1, 9, & 12

Color of W ire

PIN 3
B+

STARTER
LOCKOUT
RELAY

Wiring Color Codes

PIN 6
INIT

M9B

(Unless otherwise marked)

13/BLK

85 13/BLK
55

Right Most Digit
of W ire Number

PIN 1
GND

M9C
87a

PIN 2
LOAD

STARTER
TIMER
MODULE

STARTER
RELAY

ENGINE
BLOCK

STARTER
RELAY

10
PIN

M7B

M8B

ENGINE
HARNESS
CONNECTOR
1/RED

STARTER MOTOR
ASSEMBLY

J-11
A

10
PIN

TO FUEL PUMP RELAY
M10 & GOVERNOR

ENGINE HARNESS
CONNECTOR

The Starter Timer creates a delay between start attempts.

ELECTRICAL

M-Series Glow Plugs ON

Glow Plugs On

Conditions: Key turned to glow plugs/start position - (Diesel) -

Condition: Key Turned To Glow Plug / Start Position - (Diesel) -

GLOW PLUGS
GP1

GP2

GP3

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

OFF
Glow
Plug

13/BLK

GLOW PLUG LAMP

GLOW PLUG
GLOW PLUGS
GP1

GP2

GP3

GP4

START
KEY SWITCH

1/RED
TO START
RELAY M7A
42

KEY SWITCH

42
TO FUSES
1, 9, & 12

FROM BATTERY
NEGATIVE

RUN

CH ASS IS GRO UNDS

FROM BATTERY
POSITIVE

OFF
Glow
Plug

13/BLK

GLOW PLUG LAMP

START

Wiring Color Codes

(Unless otherwise marked)

Right Most Digit
of W ire Number

Color of W ire

Tan

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

The Glow Plugs are ON ONLY when ignition switch
is in the “Glow Plug” or “Start” Position.

M20/M30 9016006 - 3-2017

ELECTRICAL

M-Series Conventional Main & Side Brush Solution Valves

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
Condition: Key On, Scrubbing System On, Side Brush On, Propelling, 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
5

FUSE 7

15 AMP

PIN P2-19

SOL-3
16
181

PIN P2-20

SOL-7

SIDE BRUSH
SOLUTION VALVE

Wiring Color Codes

(Unless otherwise marked)

Right Most Digit
of W ire Number

Color of W ire

Tan

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

M20/M30 9016006 - 3-2017

The Solution Valves are pulsed slowly to adjust the
solution volume. Less OFF time (more Solution
LED’s lit on Touch Panel) will result in more solution
applied to floor.

The Solution Valves will function only while
propelling forward or reverse during scrub operation.

ELECTRICAL

M-Series FaST System ON

FaST System On

Touch Panel /
Control Board

FUSE 8

FaST HIGH
FLOW VALVE

15 AMP
17

PIN P2-23

SOL-5
FaST SIDE
BRUSH VALVE

PIN P2-26

SOL-6
17
Component

Max Amp Draw

SOL-5

1.7 A

SOL-6

1.7 A

M16A

200 mA

M16A

PIN P2-22

FaST WATER
PUMP RELAY

BATTERY
NEGATIVE

FaST WATER
PUMP
17

MTR10

LOW

13/BLK

M16B

Wiring Color Codes

(Unless otherwise marked)
Right Most Digit
of WireNumber

Color of Wire

Tan

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

The FaST Water Pump has two speeds (Low Flow & High Flow).
When there is no input to the pump on Wire 79/White (open),
Low Flow is selected. When Battery Negative is input to the
pump on Wire 79/White, High Flow is selected.

One or two Solution LED’s lit selects Low FaST output.

FaST High Flow Valve is ON only when all 3 Solution LED’s are lit.

M20/M30 9016006 - 3-2017

ELECTRICAL

M-Series Fuel Level Sensors

Fuel Level Sensor (Gas / LP / Diesel)

Conditions: Key on

Condition: Key On

BATTERY
NEGATIVE
Touch Panel / Control Board

Touch Panel / Control Board

GAS /
DIESEL
PIN P1-4

BATTERY
NEGATIVE

13/BLK

LPG

FUEL
PRESSURE
SWITCH

131/BLKFUEL LEVEL
WHT
30

S-8

SENDER

S-7

DIGITAL
GROUND

PIN P1-4

13/BLK

131/BLKWHT
DIGITAL
GROUND

100 OHMS = FULL TANK
5 OHMS = EMPTY TANK
NORMALLY CLOSED, HELD
OPEN BY FUEL PRESSURE
OPEN = MORE THAN 70 PSI
CLOSED = 70 PSI OR LOWER

Wiring Color Codes

(Unless otherwise marked)

Right Most Digit
of W ire Number

Color of W ire

Tan

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

M20/M30 9016006 - 3-2017

ELECTRICAL
M-Series

Impact, Hydraulic Temperature and Filter Sensors

Impact, Hydraulic Temperature & Filter Sensors Conditions: Key on
Condition: Key On

BATTERY
NEGATIVE
Touch Panel / Control Board

PIN P1-15

HYDRAULIC FILTER
CLOGGED SWITCH

13/BLK

S-17

OPEN = LESS THAN 20 PSI (FILTER OK)
CLOSED = MORE THAN 20 PSI (FILTER
CLOGGED)

HYDRAULIC OIL
TEMPERATURE SENSOR

PIN P1-17

131/BLK-WHT

S-20

DIGITAL
GROUND

0.8 VDC OR LESS = 220°F OR HIGHER
ABOVE 0.8 VDC = UNDER 220°F

IMPACT
SENSOR

PIN P1-21

13/BLK

S-23

OPEN = NO IMPACT DETECTED
CLOSED = IMPACT DETECTED

i
i

The Hydraulic Filter Clogged Switch will not be sensed until after the machine has run for 5
minutes to allow the hydraulic oil to warm up.
Impact Sensor S-23 is used only on machines with certain optional equipment.

Wiring Color Codes

(Unless otherwise marked)
Right Most Digit
of W ire Number

Color of W ire

Tan

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

M20/M30 9016006 - 3-2017

ELECTRICAL

M-Series Engine Oil Pressure, Temperature, & MIL Systems

Engine Oil Pressure, Temperature, and MIL System

Conditions: Key turned to run position - (Gas / LP) -

Condition: Key Turned To Run Position - (Gas / LP) BATTERY
POSITIVE

- Engine Oil Pressure -

FROM
AUX 1
RELAY
CONTACTS

Touch Panel /
Control Board

FUSE 5
15 AMP

LOW ENGINE OIL
PRESSURE LAMP

Refer to the Engine
Controller schematics

J-12

PIN P2-27

8
PIN

PIN P1-19

LT.BLUE/WHITE

ENGINE HARNESS
CONNECTOR

OPEN = LOW OIL PRESSURE
BATTERY NEG.= OIL PRESSURE OK

- Engine Temperature Switch Touch Panel /
Control Board

PIN P1-18

BATTERY
NEGATIVE

HIGH ENGINE
TEMPERATURE
SWITCH

OIL PRESSURE
SIGNAL FROM
ECM PIN 30

13/BLK

SW2

OPEN = BELOW 220°F
CLOSED = ABOVE 220°F

J-12
12

8
PIN

TAN/DK.GREEN

TO ECM
PIN 35

Refer to the Engine
Controller schematics

ENGINE HARNESS
CONNECTOR

Wiring Color Codes

- Malfunction Indicator Lamp -

(Unless otherwise marked)

Right Most Digit
of W ire Number

Color of W ire

Tan

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

M20/M30 9016006 - 3-2017

SWITCHED
BATTERY
POSITIVE
FROM
FUSE 1

Refer to the Engine
Controller schematics

J-11
8

10
MIL (CHECK
ENGINE LAMP)

10
PIN

LT.BLUE/BLK

ENGINE HARNESS
CONNECTOR

MIL SIGNAL
FROM ECM
PIN 26

ELECTRICAL

M-Series Engine Oil Pressure, Temperature

Engine Oil Pressure and Temperature Sensor

Conditions: Key turned to run position - (Diesel) -

Condition:Key Turned to Run Position - (Diesel) -

- Engine Oil Pressure Switch i

This drawing shown with key switch ON, and engine running

BATTERY
POSITIVE
FROM
AUX 1
RELAY
CONTACTS

ENGINE OIL
PRESSURE SWITCH

Touch Panel /
Control Board

PIN P1-19
6

FUSE 5 14
15 AMP

BATTERY
NEGATIVE

13/BLK

PIN P2-27

LOW ENGINE OIL
PRESSURE LAMP

B&C CLOSED = LOW OIL PRESSURE
A&B CLOSED = OIL PRESSURE OK

J1/P2
A

TO FUEL PUMP
RELAY M10

16
PIN
ENGINE
HARNESS
CONNECTOR

- Engine Temperature Switch Wiring Color Codes

(Unless otherwise marked)

Right Most Digit
of WireNumber

Color of Wire

Tan

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

BATTERY
NEGATIVE

Touch Panel /
Control Board

J12
PIN P1-18

HIGH ENGINE
TEMPERATURE
SWITCH
12

13/BLK

8
PIN
ENGINE
HARNESS
CONNECTOR

OPEN = BELOW 220°F
CLOSED = ABOVE 220°F

M20/M30 9016006 - 3-2017

ELECTRICAL

M-Series Engine Oil Pressure, Temperature

Fuel Pump and Speed Control Output

Conditions: Key on, engine running - (Gas / LP) -

Condition: Key On Engnie Running - (Gas / LP) -

This drawing is shown with key switch ON, and engine running.

- Fuel Pump (Gas Only) 19

J-10
D

PINK/YEL

Refer to the Engine
Controller schematics

6
PIN
19

13/BLK

FROM FUSE 4 OF
ENGINE HARNESS

BLACK

FROM CHASSIS GROUND
OF ENGINE HARNESS

ENGINE HARNESS
CONNECTOR

FUEL PUMP

- Speed Control Output J-12

Touch Panel / Control Board

PIN P2-24

PIN P2-25

8
PIN

Refer to the Engine
Controller schematics

Governor Speed “A”

ENGINE HARNESS
CONNECTORS
YEL/DK.BLUE
Governor Speed “B”

6
PIN

GRAY/DK.BLUE

TO PIN 34
OF ECM

TO PIN 48
OF ECM

J-10
Wiring Color Codes

(Unless otherwise marked)

Right Most Digit
of W ire Number

Color of W ire

Tan

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

M20/M30 9016006 - 3-2017

Speed Control
Idle
Diesel
Run
LP / Gas

T20
950 +/- 50 RPM
2400 +/- RPM

M20
M30
950 +/- 50 RPM 1350 +/- 50 RPM
2400 +/- RPM 2800 +/- 50 RPM

Idle 1350 +/- 50 RPM 1350 +/- 50 RPM 1350 +/- 50 RPM
Run 2300 +/- 50 RPM 2300 +/- 50 RPM 2300 +/- 50 RPM

ELECTRICAL

M-Series Fuel Pump

Fuel Pump

Conditions: Key on, engine running - (Diesel) -

Condition: Key On Engnie Running - (Diesel) -

This drawing is shown with key switch ON, and engine running.

BATTERY
NEGATIVE

BATTERY
POSITIVE WHILE
CRANKING FROM
START RELAY M7B

J-11

87a

M10C

FUEL PUMP
30

13/BLK

10
PIN
SWITCHED
BATTERY POSITIVE
FROM SHUTDOWN
RELAY M6C

D-5
3

M10B
FUEL
PUMP
RELAY

ENGINE HARNESS
CONNECTOR

Touch Panel /
Control Board

PIN P1-19

M10A

OIL PRESSURE
SWITCH

J-12
9

8
PIN

S-3

ENGINE HARNESS
CONNECTORS

13/BLK

Wiring Color Codes

(Unless otherwise marked)

Right Most Digit
of W ire Number

Color of W ire

Tan

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

B&C CLOSED = LOW OIL PRESSURE
A&B CLOSED = OIL PRESSURE OK

M20/M30 9016006 - 3-2017

T20 Engine Speed Control

ELECTRICAL

Conditions: Key on, engine running - (Diesel) -

Engine Speed Control

Condition: Key On Engnie Running - (Diesel) -

J-12

Touch Panel /
Control Board

PIN P2-24

PIN P2-25

8
PIN

BATTERY
NEGATIVE

Governor Speed “A”
ENGINE HARNESS
CONNECTORS
18

Governor Speed “B”

NO CONNECTION

6
PIN

J-10
Wiring Color Codes

Right Most Digit
of W ire Number

Color of W ire

Tan

Pink

Brown

Orange

Yellow

Green

SWITCHED
BATTERY
POSITIVE
FROM
SHUTDOWN
RELAY M6C

Blue

Purple

Gray

White

MAGNETIC
PICK-UP
(ENGINE SPEED)
SENSOR

+ 59

GOVERNOR
CONTROLLER

J-11
A

THROTTLE
ACTUATOR

13/BLK

(Unless otherwise marked)

60
29

3
13/BLK

13/BLK

10
PIN
ENGINE HARNESS
CONNECTOR

Governor Controller Pin Chart
pin

description

INPUT – Battery Positive

INPUT – Battery Negative

INPUT – Engine Speed Sensor

OUTPUT – Throttle Actuator (PWM)

OUTPUT – Throttle Actuator

INPUT – Engine Speed Selection “A”

INPUT – Engine Speed Selection “B”

M20/M30 9016006 - 3-2017

Speed Control
Idle
Diesel
Run
LP / Gas

T20
950 +/- 50 RPM
2400 +/- RPM

M20
M30
950 +/- 50 RPM 1350 +/- 50 RPM
2400 +/- RPM 2800 +/- 50 RPM

Idle 1350 +/- 50 RPM 1350 +/- 50 RPM 1350 +/- 50 RPM
Run 2300 +/- 50 RPM 2300 +/- 50 RPM 2300 +/- 50 RPM

Input

P2-8

SV-7

Hydraulic Enable Valve

P2-14

P2-19

SOL-3

P2-20

P2-17

P2-18

SOL-7

M4A

M6A

n/a

Shut Down Relay ON

Detergent Pump ON OR

n/a

Governor Speed Bit "A"

Governor Speed Bit "B"

P2-25

P2-24

P2-27

n/a

Low Engine Oil Pressure

Lamp

P2-29

n/a

Audible Alarm

FaST Detergent Pump ON

ON
Reverse Propel Relay ON

P2-21

P2-26

SOL-6

FaST Side Brush Valve

ON
Side Brush Solution Valve

P2-23

SOL-5

Water Pump Relay ON
FaST High Flow Valve ON

SOL-4, P2-22
Enable Valve, Air Pump &
M11

Valve ON
ES Pump ON OR FaST

Valve ON
Main Brushes Solution

Valve ON
Auto-Fill Recovery Tank

Auto-Fill Solution Tank

P2-13

when low

ES only

E = Input required to ENABLE output

ES only

P2-9

SV-12

SOL-2

P2-12

SV-11

ON
Side Brush Extend Valve

Side Brush Lower Valve

SOL-1

P2-11

SV-10

Side Brush Down Pressure

Valve ON

P2-9

SV-8

Side Brush Spin Valve ON

S-16
P1-14

Recovery
Tank Half
Full Switch
Closed

S-17
P1-15

Clogged
Hydraulic
Filter Switch
Closed

S-20
P1-17

Hydraulic Oil
Temperature
Sensor above
230F

D = Input req

S-19
P1-11

Soution
Tank
Empty
Switch
Closed

S-23
P1-21

Impact
Sensor
Closed

E
E

output

see notes

E
E

see notes

OneStep Scrub ON;
Squeegee/Scrub
Vacuum ON

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

Side Brush ON (after
OneStep Scrub ON)

Refer to Notes

OneStep Scrub OFF; Low Engine
Speed Selected

OneStep Scrub OFF; Low Engine
Speed Selected; Squeegee/Scrub
Vacuum OFF

Side Brush ON (after
OneStep Scrub ON)

Speed

Turning ON Any Touch
Panel Function OR
Selecting High Engine

Refer to OneStep Scrub ON
Notes

OneStep Scrub OFF; Low Engine
Speed Selected

Refer to OneStep Scrub ON
Notes

OneStep Scrub OFF;
Squeegee/Scrub Vacuum OFF;
Low Engine Speed Selected

Touch Panel Input(s)
Required to DISABLE

OneStep Scrub OFF; Low Engine
Speed Selected

OneStep Scrub ON;
Squeegee/Scrub
Vacuum ON

Touch Panel Input(s)
Required to ENABLE

Refer to OneStep Scrub ON
Notes

n/a
P1-1

see notes

Propel
Pedal
Sensor
NEUTRAL

Propel Pedal
Sensor
REVERSE

Propel Pedal
Sensor
FORWARD

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

Notes

M_Series Enable / Disable Chart

P2-5

SV-6

Main Brushes Spin Valve
ON

P2-6

SV-4

Rear and Side Squeegees

Lower Valve ON

P2-5

S-15
P1-13

Recovery
Tank Full
Switch
Closed

SV-3

S-14
P1-12

Solution
Tank Full
Switch
Closed

Main Brush Head Lower
Valve ON

when low

S-8
P1-4

Fuel Pressure
Switch Closed
(LPG)

SV-2

P2-4

S-7
P1-4

Fuel Level
Sender (Gas,
Diesel)

Main Brush Head Down
Pressure Valve ON

com ponent #
pin
Scrub Vacuum Fan Valve
SV-1 P2-28

Output

M20 Control Board
Inputs and the Outputs
they Control

ELECTRICAL

T20 Enable/Disable Chart

SABLE
I
D
to

uired

M20/M30 9016006 - 3-2017
119

ELECTRICAL
M_Series Control Board Connectors

T20 Control Board Connectors

socket # wire #

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

color

type

91
pink input
13 black input
x
x
x
30
tan
input
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
177 purple input
44 yellow input
45 green input
46
blue input
90
tan
input
x
x
x
78
gray input
12 brown input
9
white input
x
x
x
49 white input
x
x
x
105 green ground

socket # wire #

color

goes to

S-7 or S-8

S-19
S-14
S-15
S-16
S-17
S-20
SW2
S-23

type

goes to

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

14 yellow power
14 yellow power
81
pink power
57 purple output
SV-2
58
gray output SV-3, SV-6
59 white output
SV-4
x
x
x
61
pink output
SV-7
62 brown output SV-8, SV-12
x
x
x
64 yellow output
SV-10
66
blue output
SV-11
65 green output
SOL-1
67 purple output
SOL-2
x
x
x
x
x
x
70
tan output
M4A
71
pink output
M6A
72 brown output
SOL-3
181 pink output
SOL-7
74 yellow output
75 green output SOL-4, M11A

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
28
56
182
x
x
x
13
13
13

white
pink
gray
tan
gray
blue
brown
x
x
x
black
black
black

output
output
output
output
output
output
output
x
x
x
ground
ground
ground

M20/M30 9016006 - 3-2017
120

Forward/Reverse Propel Sensor
Unswitched Battery Negative
empty
Fuel Level Sensor or LPG Pressure Switch
empty
empty
empty
empty
empty
empty
Solution Tank Empty Switch
Solution Tank Full Switch
Recovery Tank Full Switch
Recovery Tank Half Full Switch
Clogged Hydraulic Filter Switch
empty
Hydraulic Temperature Sensor
High Engine Temperature Switch
Engine Oil Pressure Signal
empty
Impact Sensor
empty
Static Ground

SOL-5
SOL-6
SV-1

Switched Battery Positive
Switched Battery Positive
Unswitched Battery Positive
Brush Head Pressure Solenoid Valve
Brush Head Down & ON Solenoid Valves
Squeegees Down Solenoid Valve
empty
Hydraulic Enable Solenoid Valve
Side Brush ON & Down Solenoid Valves
empty
Side Brush Pressure Solenoid Valve
Side Brush Down Solenoid Valve
Solution Tank Auto Fill Water Valve
Recovery Tank Auto Fill Water Valve
empty
empty
Reverse Relay
Shutdown Relay
Main Brush Head Water Valve
Side Brush Water Valve
Detergent Pump or FaST Pressure Switch
ES Pump or FaST Enable Valve, Air Pump,
Water Pump Relay
FaST High Flow Valve
ECM (Governor Speed Bit "A")
ECM (Governor Speed Bit "B")
FaST Side Brush Valve
Low Engine Oil Pressure Lamp
Scrub Vacuum Fan Valve
Audible Alarm
empty
empty
empty
Unswitched Battery Negative
Unswitched Battery Negative
Unswitched Battery Negative

Connector
P1

Viewed from wire
side of connector.

Connector
P2

Viewed from wire
side of connector.

ELECTRICAL
M_Series Fault Condition Chart

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

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)

LCD Display

M20/M30 9016006 - 3-2017
121

ELECTRICAL
M_Series Condition and Warning Indicators

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

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.

M20/M30 9016006 - 3-2017
122

HYDRAULICS

M20 / M30 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.

M20/M30 9016006 - 3-2017

HYDRAULICS

General Information
General
PageInformation
1 of 2
(Page 1 of 2)

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

!
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

SV14

SV7

SV19

B
SV25

Indicates Energized Solenoid Valve Coil

M20/M30 9016006 - 3-2017

Circled envelope is
valve position for indicated
hydraulic circuit

HYDRAULICS

General Information
General
Information
Page
2 of 2
(Page 2 of 2)

Hydraulic Pump Flow Rates (typical)

M30

PROPEL
PUMP

ACCESSORY PUMPS

GM ENGINE

Gas/LPG: 2700 RPM
Kubota
Diesel: 2800 RPM

14.5 to 15 GPM
(54.8 to 56.7 LPM)
maximum

4 to 4.2 GPM
(15.1 to 15.9
LPM)

9.5 to 10 GPM
(35.9 to 37.8
LPM)

6 to 6.3 GPM
(22.7 to 23.8
LPM)

PUMP
1

PUMP
2

PUMP
3

PROPEL
PUMP

M20
GM ENGINE @
2400 RPM

12.5 GPM
(47.3 LPM)
maximum

ACCESSORY PUMPS

4 GPM
10 GPM
6 GPM
(15.1 LPM) (37.9 LPM) (22.7 LPM)
PUMP
1

PROPEL
PUMP

M20/M30
Mitsubishi
ENGINE @
2300 RPM

PUMP
2

PUMP
3

ACCESSORY PUMPS

12.35 GPM
3.98 GPM 8.56 GPM 5.97 GPM
(46.75 LPM) (15.07 LPM) (32.4LPM) (22.6 LPM)
maximum
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

M
P
R or T

Hydraulic Motor Connection
Pump Connection
Return Port (To Tank)

M20/M30 9016006 - 3-2017

HYDRAULICS

M20_M30
Matrix
M20Operational
/ M30 Operating
Matrix

M20/M30 9016006 - 3-2017

HYDRAULICS

M20_M30
Option Components
M20 / M30 Option Components

M20/M30 9016006 - 3-2017

HYDRAULICS

M20_M30
Locator
M20 / M30Hydraulic
HydraulicComponent
Component Locator
Side Brush Motor
Sweep
Motor
- Scrub
Fan Motor
Side Brush- Motor
– SweepFan
Fan Motor
– Scrub Fan
Motor
Propel Motor – Main Brush Motor – Side Sq. Lift Cyl.
Propel Motor - Main Brush Motor - Side Sqeegee Lift Cylinder
SIDE BRUSH MOTOR
FRONT

SWEEP FAN
MOTOR

SCRUB FAN
MOTOR

MAIN BRUSH MOTOR (REAR)

PROPEL MOTOR

LEFT SIDE SQUEEGEE LIFT CYLINDER
M20/M30 9016006 - 3-2017

HYDRAULICS

M20_M30
Locator
M20 M30Hydraulic
Hydraulic Component
Component Locator
Hopper CylinderHopper
- Scrub
Head
Cylinder
- Side
Cyl. – Scrub
Head Cyl.Side Brush Extend
Cyl. Brush Extend
Side Sq. Cyl. – Main Brush Motor – Side Brush Lift Cyl.
CylinderSide Squeegee Cylinder - Main Brush Motor
HOPPER LIFT CYLINDER

SCRUB HEAD LIFT CYLINDER

SIDE BRUSH EXTEND CYLINDER
FRONT BUMPER
(INNER VIEW)

FRONT

RIGHT SIDE SQUEEGEE LIFT CYLINDER
FRONT

SIDE BRUSH LIFT CYLINDER

MAIN BRUSH MOTOR (FRONT)

M20/M30 9016006 - 3-2017

HYDRAULICS

M20_M30
ComponentLocator
Locator
M20 M30Hydraulic
Hydraulic Component
Sweep Fan Valve
Scrub
Sweep Manifold
Sweep Fan-Valve
– ScrubManifold
Manifold – Sweep-Manifold
Accessory Pumps – Side Brush Manifold – Propel Pump

SWEEP FAN VALVE SV9
(BESIDE ENGINE FUSE PANEL)

SCRUB MANIFOLD
SV1, SV2, SV3, SV4,SV6, SV7
RV1, RV2, CV1, PC1, PC2

See pages 00, 00 and 00
for more information on
the Scrub, Sweep, and
Side Brush manifolds

FRONT

SWEEP MANIFOLD
SV13, SV14, SV15,
RV3, PC5, PC6

FRONT

ACCESSORY PUMPS
FRONT

SIDE BRUSH MANIFOLD
SV8, SV10, SV11, SV12, PR1, PC8
M20/M30 9016006 - 3-2017

PROPEL PUMP

HYDRAULICS

M20_M30 Hydraulic Component Locator
Steering
Cylinder
- Hopper
Door Cylinder
M20 M30
Hydraulic
Component
Locator Steering Cylinder – Hopper Door Cylinder – Rear Sq. Lift Cyl.
Rear Squeegee Lift Cylinder
STEERING CYLINDER

FRONT

HOPPER DOOR CYLINDER

REAR SQUEEGEE LIFT CYLINDER
(VIEWED BEHIND BUMPER)
M20/M30 9016006 - 3-2017

Hose Group: Steering and Propel

HYDRAULICS

M20_M30 Hydraulic Component Locator
Hose Group - Steering and Propel

M20/M30 9016006 - 3-2017

HYDRAULICS

M20_M30 Hydraulic Component Locator
Hose Group - Pump and Vacuum Fan
Hose Group: Pump and Vacuum Fan

M20/M30 9016006 - 3-2017

HYDRAULICS

M20_M30 Hydraulic Component Locator
Group:
Brush and
Hopper
HoseHose
Group
- Brush
and
Hopper

M20/M30 9016006 - 3-2017

HYDRAULICS

M20_M30 Hydraulic Component Locator
Hose
Group:- Squeegee
Lift Lift
Hose
Group
Squeegee

M20/M30 9016006 - 3-2017

HYDRAULICS

M20_M30 Scrub/Sweep Head Lower
M20/M30 Scrub/Sweep Head Lower
Pressure / Flow Line
Suction Line
Return or Low Pressure Line
Active Pilot Port Line
Inactive Pilot Port Line
Case Drain Line
Default M20 SCRUBBING
Pressure Readings
# Brush
Pressure at G1
LEDs ON
95 - 143 psi
1
(6.5 – 9.8 bar)
160 – 240 psi
2
(11 – 16.5 bar)
280 – 400 psi
3
(19.3 – 27.5 bar)
Default M20 SWEEPING
Pressure Readings
# Brush
Pressure at G1
LEDs ON
6 - 14 psi
1
(0.4 – 1 bar)
38 – 56 psi
2
(2.6 – 3.8 bar)
73 – 109 psi
3
(5 – 7.5 bar)

Engine speed: High

MAIN VALVE MANIFOLD

SV7

Gray items are
energized
or activated

T2
OR3
0.140 in
(3.55 mm)

RV2

2500 PSI
(172.4 BAR)
ORIFICE

0.040 in
(1.0 mm)

*PWM*

SV2

SCRUB HEAD
ACTUATOR

LOWER

Scrub
Head
Actuator

SV3
T1

PC1

NOTE
SPRING
ASSIST

ENGINE

OIL
FILTER

3 PSI
(20.7 kPa)

The “# Brush Pressure LEDs ON”
are the Touch Panel LED indicators
for Brush down pressure
OIL
COOLER

SCREEN

35 PSI
(2.4 BAR)
M20/M30 9016006 - 3-2017

HYDRAULICS

M20_M30 Scrub/Sweep Head Lift
M20 / M30 Scrub/Sweep 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

MAIN VALVE MANIFOLD

SV7

Gray items are
energized
or activated

T2
OR3
0.140 in
(3.55 mm)

RV2

2500 PSI
(172.4 BAR)
M20 ORIFICE

Scrub
Head
Actuator

0.046 in
(1.17 mm)

M30 ORIFICE

0.040 in
(1.0 mm)

SCRUB HEAD
ACTUATOR

LIFT

SV2
SV3
NOTE
SPRING
ASSIST

PC1

ENGINE

OIL
FILTER

3 PSI
(20.7 kPa)

OIL
COOLER

SCREEN

35 PSI
(2.4 BAR)

M20/M30 9016006 - 3-2017

HYDRAULICS

M20_M30 Squeegee Lower
M20 / M30 Squeegees Lower
Engine speed: High

Pressure / Flow Line
Suction Line
Return or Low Pressure Line
Active Pilot Port Line
Inactive Pilot Port Line
Case Drain Line

SV7

Gray items are
energized
or activated

MAIN VALVE MANIFOLD

T2
OR3
0.140 in
(3.55 mm)

RV2

2500 PSI
(172.4 BAR)
M20 ORIFICE

0.046 in
(1.17 mm)

M30 ORIFICE

0.040 in
(1.0 mm)

SV4
C4

PC2
C3
RIGHT
SQUEEGEE
ACTUATOR

ORIFICE

LOWER

0.031 in
(0.79 mm)

REAR
SQUEEGEE
ACTUATOR

0.031 in
(0.79 mm)

LOWER

LEFT
SQUEEGEE
ACTUATOR

ORIFICE

0.036 in
(0.91 mm)

ENGINE

OIL
FILTER

3 PSI
(20.7 kPa)

OIL
COOLER

SCREEN

35 PSI
(2.4 BAR)
M20/M30 9016006 - 3-2017

HYDRAULICS

M20_M30 Squeegee Lift
M20 / M30 Squeegees Lift
Engine speed: High

Pressure / Flow Line
Suction Line
Return or Low Pressure Line
Active Pilot Port Line
Inactive Pilot Port Line
Case Drain Line

SV7

Gray items are
energized
or activated

MAIN VALVE MANIFOLD

T2
OR3
0.140 in
(3.55 mm)

RV2

2500 PSI
(172.4 BAR)
M20 ORIFICE

0.046 in
(1.17 mm)

M30 ORIFICE

SV4

0.040 in
(1.0 mm)

PC2
C3
LEFT
SQUEEGEE
ACTUATOR

RIGHT
SQUEEGEE
ACTUATOR

LIFT

ORIFICE

0.031 in
(0.79 mm)

ORIFICE

LIFT

0.031 in
(0.79 mm)

REAR
SQUEEGEE
ACTUATOR

0.036 in
(0.91 mm)

ENGINE

OIL
FILTER

3 PSI
(20.7 kPa)

OIL
COOLER

SCREEN

35 PSI
(2.4 BAR)

M20/M30 9016006 - 3-2017

HYDRAULICS

M20_M30 Main Brushes On
M20 / M30 Main Brushes ON
Pressure / Flow Line
Suction Line
Return or Low Pressure Line
Active Pilot Port Line
Inactive Pilot Port Line
Case Drain Line

Engine speed: High

MAIN VALVE
MANIFOLD

SV7

Gray items are
energized
or activated

RV2

2500 PSI
(172.4 BAR)
OR3
0.140 in
(3.55 mm)

CV1

SV6

M1
REAR MAIN
BRUSH
MOTOR

ENGINE

i
OIL
FILTER

3 PSI
(20.7 kPa)

FRONT MAIN
BRUSH
MOTOR

Main Brush Motors speed:
M20 / 420-480
M30 / 460-480 RPM
OIL
COOLER

SCREEN

35 PSI
(2.4 BAR)
M20/M30 9016006 - 3-2017

HYDRAULICS

M20_M30 Side Brush On
M20 / M30 Side Brush ON
Engine speed: High

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

MAIN VALVE MANIFOLD

RV1

2500 PSI
(172.4 BAR)

SV1

Side Brush can only be
operated when Main
Brushes are ON

PRESSURE
WASHER
MOTOR

SOL1

SV9

SIDE BRUSH
MANIFOLD

P3
SCRUB FAN
MOTOR

SV8

1800 PSI
(124 BAR)

25 PSI
(1.7 BAR)

SWEEP FAN
MOTOR

ENGINE

i
OIL
FILTER

3 PSI
(20.7 kPa)

SIDE BRUSH
MOTOR

Side Brush Motor speed:
140-160 RPM
OIL
COOLER

SCREEN

35 PSI
(2.4 BAR)

M20/M30 9016006 - 3-2017

HYDRAULICS

M20_M30 Scrub Vacuum Fan On
M20 / M30 Scrub Vacuum Fan ON
Engine speed: High

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

MAIN VALVE MANIFOLD

RV1

2500 PSI
(172.4 BAR)

i
i

SV1

Scrub Fan Motor speed:
10,500 RPM (+/- 150 RPM)
Scrub Fan Motor vacuum:
30-39 in/H2O (76-99 cm/H2O)
measured at squeegee

PRESSURE
WASHER
MOTOR

SV9

SIDE BRUSH
MANIFOLD

SOL1

SV8
T3

P3
SCRUB FAN
MOTOR

1800 PSI
(124 BAR)

25 PSI
(1.7 BAR)

SWEEP FAN
MOTOR

SIDE BRUSH
MOTOR

ENGINE

OIL
FILTER

3 PSI
(20.7 kPa)

OIL
COOLER

SCREEN

35 PSI
(2.4 BAR)
M20/M30 9016006 - 3-2017

HYDRAULICS

M20_M30 Scrub Vacuum Fan & Side Brush On
M20 / M30 Scrub Vacuum Fan & Side Brush ON
Engine speed: High

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

MAIN VALVE MANIFOLD

RV1

2500 PSI
(172.4 BAR)

i
i

SV1

Scrub Fan Motor speed:
10,500 RPM (+/- 150 RPM)
Scrub Fan Motor vacuum:
30-39 in/H2O (76-99 cm/H2O)
measured at squeegee

PRESSURE
WASHER
MOTOR

SV9

SOL1
SIDE BRUSH
MANIFOLD

P3
SCRUB FAN
MOTOR

SV8

1800 PSI
(124 BAR)

25 PSI
(1.7 BAR)

SWEEP FAN
MOTOR

ENGINE

Side Brush can only be
operated when Main
Brushes are ON
OIL
FILTER

3 PSI
(20.7 kPa)

SIDE BRUSH
MOTOR

Side Brush Motor speed:
140-160 RPM
OIL
COOLER

SCREEN

35 PSI
(2.4 BAR)

M20/M30 9016006 - 3-2017

HYDRAULICS

M20_M30 Scrub Vacuum Fan On
M20 / M30 Sweep Vacuum Fan ON
Engine speed: High

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

MAIN VALVE MANIFOLD

RV1

2500 PSI
(172.4 BAR)

SV1

Sweep Fan Motor speed:
7,000 RPM (+/- 150 RPM)

Sweep Fan Motor vacuum:
18-24 in/H2O (45-61 cm/H2O)

PRESSURE
WASHER
MOTOR

SIDE BRUSH
MANIFOLD

SOL1
SV9

SV8
T3

SCRUB FAN
MOTOR

M2
1800
PSI
(124
BAR)

SWEEP FAN
MOTOR

25 PSI
(1.7 BAR)

SIDE BRUSH
MOTOR

ENGINE

OIL
FILTER

3 PSI
(20.7 kPa)

OIL
COOLER

SCREEN

35 PSI
(2.4 BAR)
M20/M30 9016006 - 3-2017

HYDRAULICS

M20_M30 Scrub Vacuum Fan & Side Brush On
M20 / M30 Sweep Vacuum Fan & Side Brush ON
Engine speed: High

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

MAIN VALVE MANIFOLD

RV1

2500 PSI
(172.4 BAR)

SV1

Sweep Fan Motor speed:
7,000 RPM (+/- 150 RPM)

Sweep Fan Motor vacuum:
18-24 in/H2O (45-61 cm/H2O)

PRESSURE
WASHER
MOTOR

SOL1
SIDE BRUSH
MANIFOLD

SV9

SV8

SCRUB FAN
MOTOR

1800
PSI
(124
BAR)

25 PSI
(1.7 BAR)

SWEEP FAN
MOTOR

ENGINE

Side Brush can only be
operated when Main
Brushes are ON
OIL
FILTER

3 PSI
(20.7 kPa)

SIDE BRUSH
MOTOR

Side Brush Motor speed:
140-160 RPM
OIL
COOLER

SCREEN

35 PSI
(2.4 BAR)

M20/M30 9016006 - 3-2017

HYDRAULICS

M20_M30 Pressure Washer On
M20 / M30 Pressure Washer ON
Engine speed: High

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

MAIN VALVE MANIFOLD

RV1

2500 PSI
(172.4 BAR)

SV1

PRESSURE
WASHER
MOTOR

SIDE BRUSH
MANIFOLD

SV9

SV8

SOL1

P3
SCRUB FAN
MOTOR

1800 PSI
(124 BAR)

25 PSI
(1.7 BAR)

SWEEP FAN
MOTOR

SIDE BRUSH
MOTOR

ENGINE

OIL
FILTER

3 PSI
(20.7 kPa)

OIL
COOLER

SCREEN

35 PSI
(2.4 BAR)
M20/M30 9016006 - 3-2017

HYDRAULICS

M20_M30 Hopper Lift
M20 / M30 Hopper 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

MAIN VALVE MANIFOLD

SV7

OR3
0.140 in
(3.55 mm)

RV2

Gray items are
energized
or activated

2500 PSI
(172.4 BAR)
ORIFICE

0.040 in
(1.0 mm)

RV3

1100 PSI (75.8 BAR)

SV13

PC7

C12

OR1

0.031 in
(0.79 mm)

ENGINE

OIL
FILTER

PC5 C9

ORIFICES

0.028 in
(0.71 mm)

LIFT

SV14

HOPPER LIFT
ACTUATORS

OIL
COOLER

SCREEN

35 PSI
(2.4 BAR)

M20/M30 9016006 - 3-2017

HYDRAULICS

M20_M30 Hopper Lower
M20 / M30 Hopper 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

MAIN VALVE MANIFOLD

SV7

OR3
0.140 in
(3.55 mm)

RV2

Gray items are
energized
or activated

2500 PSI
(172.4 BAR)
M20 ORIFICE

0.046 in
(1.17 mm)

M30 ORIFICE

0.040 in
(1.0 mm)

RV3

1100 PSI (75.8 BAR)

PC7

C12
LOWER

LOWER

SV13

OR1

0.031 in
(0.79 mm)

ENGINE

PC5 C9

ORIFICES

0.028 in
(0.71 mm)

HOPPER LIFT
ACTUATORS

SV14
OIL
FILTER

OIL
COOLER

SCREEN

35 PSI
(2.4 BAR)
M20/M30 9016006 - 3-2017

HYDRAULICS

M20_M30 Hopper Door Open
M20 / M30 Hopper Door Open
Pressure / Flow Line
Suction Line
Return or Low Pressure Line
Active Pilot Port Line
Inactive Pilot Port Line
Case Drain Line

Engine speed: High

MAIN VALVE MANIFOLD

SV7

Gray items are
energized
or activated

RV2

OR3
0.140 in
(3.55 mm)

RV2 Opens when
the Hopper Door
Actuator reaches
the End of Stroke.

2500 PSI
(172.4 BAR)

M20 ORIFICE

0.046 in
(1.17 mm)

M30 ORIFICE

0.040 in
(1.0 mm)

G11
HOPPER DOOR
ACTUATOR

SV15

OR2

0.040 in
(1.0 mm)

PC6

C11
OPEN

C10
ENGINE

OIL
FILTER

OIL
COOLER

SCREEN

35 PSI
(2.4 BAR)

M20/M30 9016006 - 3-2017

HYDRAULICS

M20_M30 Hopper Door Close
M20 / M30 Hopper Door Close
Pressure / Flow Line
Suction Line
Return or Low Pressure Line
Active Pilot Port Line
Inactive Pilot Port Line
Case Drain Line

Engine speed: High

MAIN VALVE MANIFOLD

SV7

Gray items are
energized
or activated

RV2

OR3
0.140 in
(3.55 mm)

RV2 Opens when
the Hopper Door
Actuator reaches
the End of Stroke.

2500 PSI
(172.4 BAR)

M20 ORIFICE

0.046 in
(1.17 mm)

M30 ORIFICE

0.040 in
(1.0 mm)

G11

SV15

HOPPER DOOR
ACTUATOR
OR2

PC6

C11

0.040 in
(1.0 mm)

C10
ENGINE

OIL
FILTER

OIL
COOLER

SCREEN

35 PSI
(2.4 BAR)
M20/M30 9016006 - 3-2017

HYDRAULICS

M20_M30 Side Brush Lower
M20 / M30 Side Brush Lower
Engine speed: High

Pressure / Flow Line
Suction Line
Return or Low Pressure Line
Active Pilot Port Line
Inactive Pilot Port Line
Case Drain Line

MAIN VALVE MANIFOLD

P2
RV2 Opens when
the Side Brush Lift
Actuator reaches
the End of Stroke.

SV7

Default M30SCRUBBING
Pressure Readings
# Brush
Pressure at G13
LEDs ON
320 - 370 psi
1
(22 – 25.5 bar)
410 – 450 psi
2
(28.3 – 31 bar)
510 – 560 psi
3
(35.1 – 38.6 bar)

OR3
0.140 in
(3.55 mm)

RV2

2500 PSI
(172.4 BAR)
ORIFICE

0.055 in
(1.4 mm)

P7
M20 ORIFICE

0.046 in P4
(1.17 mm)

*PWM*

M30 ORIFICE

SIDE BRUSH
MANIFOLD

0.040 in
(1.0 mm)

Gray items are
energized
or activated

G13

Default M30 SWEEPING
Pressure Readings
# Brush
Pressure at G13
LEDs ON
275 - 340 psi
1
(18.9 – 23.4 bar)
310 – 370 psi
2
(21.3 – 25.5 bar)
400 – 480 psi
3
(27.5 – 33 bar)

SIDE BRUSH
LIFT ACTUATOR

LOWER

SV10

SV11
C8

PR1A

400 PSI
(27.6 BAR)

G8
T4

ENGINE

i
OIL
FILTER

The “# Brush Pressure LEDs ON”
are the Touch Panel LED indicators
for Brush down pressure
OIL
COOLER

SCREEN

35 PSI
(2.4 BAR)

100

M20/M30 9016006 - 3-2017

HYDRAULICS

M20_M30 Side Brush Lift
M20 / M30 Side Brush Lift
Engine speed: High

Pressure / Flow Line
Suction Line
Return or Low Pressure Line
Active Pilot Port Line
Inactive Pilot Port Line
Case Drain Line

MAIN VALVE MANIFOLD

SV7

Gray items are
energized
or activated

OR3
0.140 in
(3.55 mm)

RV2

2500 PSI
(172.4 BAR)
ORIFICE

0.055 in
(1.4 mm)

P7
M20 ORIFICE

0.046 in P4
(1.17 mm)

SIDE BRUSH MANIFOLD

G13

M30 ORIFICE

0.040 in
(1.0 mm)

SIDE BRUSH
LIFT ACTUATOR

SV11
SV10

PR1A

400 PSI
(27.6 BAR)

LIFT

G8
T4

ENGINE

OIL
FILTER

OIL
COOLER

SCREEN

35 PSI
(2.4 BAR)
M20/M30 9016006 - 3-2017

101

HYDRAULICS

M20_M30 Side Brush Extend
M20 / M30 Side Brush Extend
Engine speed: High

Pressure / Flow Line
Suction Line
Return or Low Pressure Line
Active Pilot Port Line
Inactive Pilot Port Line
Case Drain Line

MAIN VALVE MANIFOLD

SV7

Gray items are
energized
or activated

RV2

OR3
0.140 in
(3.55 mm)

RV2 Opens when
the Side Brush
Extend Actuator
reaches the End
of Stroke.

2500 PSI
(172.4 BAR)
ORIFICE

0.055 in
(1.4 mm)

P7
M20 ORIFICE

0.046 in P4
(1.17 mm)

M30 ORIFICE

0.040 in
(1.0 mm)

PR1B

SIDE BRUSH MANIFOLD

100 PSI
(6.9 BAR)

SIDE BRUSH
EXTEND ACTUATOR

C7
EXTEND

SV12

G10

PC8 C5

T4
ENGINE

OIL
FILTER

OIL
COOLER

SCREEN

35 PSI
(2.4 BAR)

102

M20/M30 9016006 - 3-2017

HYDRAULICS

M20_M30 Side Brush Retract
M20 / M30 Side Brush Retract
Engine speed: High

Pressure / Flow Line
Suction Line
Return or Low Pressure Line
Active Pilot Port Line
Inactive Pilot Port Line
Case Drain Line

MAIN VALVE MANIFOLD

SV7

Gray items are
energized
or activated

RV2

RV2 Opens when
the Side Brush
Extend Actuator
reaches the End
of Stroke.

OR3
0.140 in
(3.55 mm)

2500 PSI
(172.4 BAR)
ORIFICE

0.055 in
(1.4 mm)

P7
M20 ORIFICE

0.046 in P4
(1.17 mm)

M30 ORIFICE

100 PSI
(6.9 BAR)

SIDE BRUSH MANIFOLD

G7
SIDE BRUSH
EXTEND ACTUATOR

100 PSI

0.040 in
(1.0 mm)

PR1B

G10

RETRACT

SV12

PC8 C5
T4
ENGINE

OIL
FILTER

OIL
COOLER

SCREEN

35 PSI
(2.4 BAR)
M20/M30 9016006 - 3-2017

103

HYDRAULICS

Hydraulic Solenoid Valve Details
Hydraulic Solenoid Valve Details

SV1

Scrub Fan Motor

SV2
*PWM*

Main Brushes
Lift/Lower Actuator

SV7

Enable Valve

SV3

SV4

Main Brushes
Lift/Lower Actuator

Side & Rear
Squeegees
Lift/Lower Actuator

SV8

SV12

Side Brush
Lift/Lower Actuator

Side Brush
Extend/Retract
Actuator

Main Brush Motors

SV9

Side Brush Motor

SV11

SV6

Sweep Fan Motor

SV13
SV15

SV14

Hopper Door
Actuator

SV10
*PWM*

Side Brush
Lift/Lower Actuator

SOL1

Pressure Washer
Motor

Hopper
Lift/Lower Actuator

104

M20/M30 9016006 - 3-2017

FAULT CODES

M20_M30 Fault Codes
(ProPanel and Standard Panel)

M20/M30 9016006 - 3-2017

105

FAULT CODES

M20_M30 Fault Codes
(ProPanel and Standard Panel)

106

M20/M30 9016006 - 3-2017

FAULT CODES

M20_M30 Fault Codes
(ProPanel and Standard Panel)

M20/M30 9016006 - 3-2017

107

FAULT CODES

M20_M30 Fault Codes
(ProPanel and Standard Panel)

108

M20/M30 9016006 - 3-2017

FAULT CODES

M20_M30 Fault Codes
(ProPanel and Standard Panel)

M20/M30 9016006 - 3-2017

109

FAULT CODES

M20_M30 Fault Codes
(ProPanel and Standard Panel)

110

M20/M30 9016006 - 3-2017

FAULT CODES

M20_M30 Fault Codes
(ProPanel and Standard Panel)

M20/M30 9016006 - 3-2017

111

MAINTENANCE

M Series Maintenance
MAINTENANCE

17
5

112

M20/M30 9016006 - 3-2017

MAINTENANCE
T he table below indicates the Person Responsible for each procedure.
0 = Operator.
T = Trained Service Mechanic.

Interval
100
Hours

200
Hours

400
Hours
800
Hours

Person
Resp.
T
T
T

Key
18
18
1

0
T
T
0
T

13, 19
6
6
2
12

T
T
T

1, 17
12
1, 18

T
T
T
T

11
14
5
1

T
T
T
T
T
T

20
10
1, 18
13
13

Description
Radiator
Hydraulic cooler
Engine
Tires
Rear squeegee casters
Rear squeegee
Scrub head skirt
Front wheel support
bearings
Torque tube
Steering cylinder
Radiator hoses and
clamps
Brake pedal
Hopper lift arm pivots
Hopper door pivots
Engine
Rear wheel bearings
Hydraulic reservoir
Hydraulic hoses
Cooling system
Propelling motor
Front wheel
Battery

Procedure
Clean core exterior
Clean core exterior
Change oil and filter
Drain LPG vaporizer oil
buildup
Check for damage
Lubricate
Check leveling
Check for damage or wear
Lubricate
Lubricate
Lubricate
Check for tightness and
wear
Check adjustment
Lubricate
Lubricate
Replace air filter
Replace fuel filter
Check, lubricate, and adjust
Replace filler cap
Check for wear and damage
Flush
Torque shaft nut
Torque wheel nuts
Clean and tighten battery
cable connections

No. of
Lubricant Service
/Fluid
Points
1
1
EO
1
1
-

SPL

3
2
1
1
2

SPL
SPL
-

4
1
2

1
2
2
1
1
2
1
All
2
1
1

SPL
-

SPL
SPL
SPL
WG
-

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.

M20/M30 9016006 - 3-2017

113

MAINTENANCE

The table below indicates the Person Responsible for each procedure.
0 = Operator.
S = Trained Service Mechanic.
Person
Resp.
T
T
T
T

Key
16
1
1
1, 19

Description
FaST system filters
Engine
Engine
Radiator hoses

1200
Hours

Hydraulic reservoir

2400
Hours

Hydraulic reservoir

* Change hydraulic fluid
* Replace strainer outlet

5000
Hours

Engine

Replace camshaft and
balance shaft belts

Interval
1000
Hours

No. of
Lubricant/ Service
Fluid
Points
2
4
1
2

Procedure
Replace
Replace spark plu gs
Inspect PCV system
Check for cracks or
deterioration
* Replace fluid filter

HYDO

1
1

114

M20/M30 9016006 - 3-2017

MAINTENANCE
YELLOW TOUCH POINTS
This machine features easy to find yellow touch
points for simple service item s. No tools are
required to perform these maintenance
operations.

SQUEEGEE CASTER BEARINGS
Lubricate the squeegee caster bearings after
every 100 hours of operation.

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.
M20/M30 9016006 - 3-2017

115

MAINTENANCE

REAR WHEEL BEARINGS

TORQUE TUBES

Inspect the rear wheel bearings for seal damage,
and repack and adjust every 400 hours of
operation. Use Lubriplate EMB grease (Tennant
part number 01433-1).

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.

HOPPER LIFT ARM PIVOTS

On the other side of the machine the torque tube
grease fittings are located beneath the propel
pump.

Lubricate the hopper lift arm pivots after every
200 hours of operation.

HOPPER DOOR PIVOTS
Lubricate the hopper door pivots after every 200
hours of operation.

.!::?
116

M20/M30 9016006 - 3-2017

MAINTENANCE
HYDRAULICS

Check the hydraulic fluid level at operating
temperature daily. The hydraulic fluid level should
be between the two lines on the hydraulic gauge.
The hopper must be down when checking
hydraulic fluid level.

Replace the filler cap after every BOO hours of
operation. Apply a light film of hydraulic fluid onto
the filler cap gasket before installing the cap onto
the reservoir.

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.

M20/M30 9016006 - 3-2017

117

MAINTENANCE

118

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MAINTENANCE
ENGINE
FOR SAFETY: Before leaving or servicing
machine, stop on level surface, set parking
brake, turn off machine, and remove key.
COOLING SYSTEM

Check the radiator core exterior and hydraulic
cooler fins for debris after every 1 00 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.

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.

FOR SAFETY: When servicing machine, wear
eye and ear protection when using
pressurized air or water.
AIR FILTER
Replace the air filter after every 400 hours of
operation.
Flush the radiator and the cooling system after
every 800 hours of operation.
Check the radiator hoses and clamps after every
200 hours of operation. T ighten loose clamps.
Replace damaged hoses and clamps.
Check the radiator hoses for cracks and
deteriation after every 1000 hours of operation.

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119

MAINTENANCE
FUEL FILTER (LPG)

LPG VAPORIZER

Replace the LPG fuel filter after every 400 hours
of operation.

Drain oil buildup in the LPG vaporizer after every
1 00 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.

ENGINE BELT
FUEL FILTER (Gasoline)
Replace the gasoline fuel filter after every 400
hours of operation.

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 1 O lb) applied at the mid-point of the
longest span.

FOR SAFETY: When servicing machine, keep
flames and sparks away from fuel system
service area. Keep area well ventilated.

WA RNING: Moving belt and fan. Keep

A
.. away.

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MAINTENANCE
PCV SYSTEM
Inspect the PCV sy stem after every 1000 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.

SPARK PLUGS
Replace the spark plugs after every 1000 hours of
operation.
FOR SAFETY: When servicing machine, avoid
contact with battery acid.

CAMSHAFT AND BALANCE SHAFT BELTS
Replace the camshaft and balance shaft belts
after every 5000 hours of operation.

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121

MAINTENANCE
Refer to the table below for the fuses and circuits
protected.

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.

Fuse

Rating

FU1

15A

Auxiliary Relays/Engine Controls

FU3

15A

Horn

FU2

FU4

15A

Circuit Protected

Shaker

Not Used

FU5

15A

ScrubVacuum/Main Brush/
Squeegee Down/Hopper Up

FU6

15A

Enable/Side Brush/SweepVacuum

FU8

15A

FU9

15A

Lights

FU11

15A

Not Used: Options

FU?

FU10
FU12

FU13

FU14

15A

15A
15A

20A

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.

Solution/Hopper Latch and Door/
Auto FiD/Reverse/Shaker
ES/FaST/Detergent/
Hopper Down/Spray Wand

Unswitched B+ for controller board
Spray Nozzle Pump

AC/Heater Option
Not Used

I ec-H20 (near ignition switch)

Refer to the diagram below for locations of the
fuses and relays on the relay panel.
�

r----,

�2

�D�D�D�D�D�DED
�D�D�D�D�D�D�D

Refer to the table below for the relays and circuits
controlled.
Relay

1.18

12VDC, 40A Shaker

12VDC, 40A

Horn

12VDC, 40A

Starter

12VDC, 40A Auxiliary 2

12VDC, 40A

Reverse

12VDC, 40A Shutdown

12VDC, 40A Auxilliary 3

122

Circuit Controlled

12VDC, 40A Auxiliary 1

M4
,---..

Rating

M1
M2

�

12VDC, 40A Spare

M20/M30 9016006 - 3-2017

MAINTENANCE
ENGINE HARNESS FUSES AND RELAYS
The eng;ne 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.

CL EANING THE HOPPER DUST F ILTER
Shake the dust filter before emptying the hopper
and at the end of every shift. Inspect and clean
the filter after every 20 hours of operation.
Replace damaged dust filters.
NOTE: The dust f;fter may need to be cleaned at
more frequent ;ntervals ff the mach;ne ;s used ;n
extremely dusty cond;t;ons.
Use one of the following methods to clean the
dust filter:
SHAKING-Press the mter shaker button.

NOTE: Always replace a fuse w;th a fuse of the
same amperage.

TAPPING-Tap the filter, with the dirty side down,
gently on a flat surface. Do not damage the
edges of the filter. The filter will not seal properly
in the filter frame if the edges of the filter are
damaged.

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

12VDC. 40 A

Spray Wand

12VDC. 40 A

Pressure Washer

12VDC. 40 A

FaST

CIRCUIT BREAKERS (ec-H20)
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.

M20/M30 9016006 - 3-2017

Al R-Always wear eye protection when using
compressed air. Blow air through the dust filter
opposite the direction of the arrows. Never use
more than 690 kPa (100 psi) of air pressure and
never hold the nozzle closer than 50 mm (2 in) to
the filter. This may be done with the dust filter in
the machine.

123

MAINTENANCE
WATER-Rinse the dust filter with a low pressure
garden hose through the dust filter opposite the
direction of the arrows.

MAIN BRUSHES
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: ff water is used to clean the dust filter, be
sure the filter is completely dry before reinstalling
it into the hopper. Do Not reinstall a wet dust
filter.

NO TE: Replace brushes in sets of two. Otherwise
one scrub brush may scrub more aggressively
than the other.

THERMO-SENTRY

REPLACING OR ROTATING THE MAIN
BRUSHES

The Thermo-Sentry, located inside the
hopper, senses the temperature of the air pulled
up from the hopper. If there is a fire in the hopper,
the Thermo-Sentry stops the vacuum f an and
cuts off the air flow. The Thermo-Sentry
automatically resets after cooling down.

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.

2. Open the outer brush doors.

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MAINTENANCE
3. Open the inner brush doors.

6. Install the new or rotated brushes by pushing
down on the ends while sliding them onto the
drive motor hubs.

4. Remove the brush idler plates.
7. llf rotating the brushes, always rotate the front
with the back so that they wear evenly. They
may be rotated end-for-end as well.

5. Pull the brushes out from the scrub head.

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.

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125

MAINTENANCE
CHECKING THE MAIN BRUSH PATTERN
1. Apply chalk, or a similar marking material, to
a smooth and level section of the floor.

7. If the brush patterns are tapered, see
ADJUSTING THE MAIN BRUSH TAPER
section of this manual.

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.
4. Press the 1-STEP Sweep 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.

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 MAIN
BRUSH WIDTH section of this manual.

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.

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MAINTENANCE
ADJUSTING THE MAIN BRUSH TAPER

1. Loosen the four mounting bolts on the brush
drive housing.

ADJUSTING THE MAIN 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 l inks 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
25mm (1 in).

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.

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2. Recheck the pattern. Readjust if necessary.

127

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.

128

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.

M20/M30 9016006 - 3-2017

MAINTENANCE
FaST SYSTEM
REPLACING THE FaST-PAK CARTON
FOR SAFETY: Before leaving or servicing
machine, stop on level surface, set parking
brake, turn off machine, and remove key.

CLEANING THE FaST SUPPLY HOSE
CONNECTOR

Soak the connector in warm water if detergent
buildup is visible. When a FaST-PAK carton is not
installed, store the supply hose connector on the
storing plug to prevent the hose from clogging.

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 FaST-PAK
carton out from the compartment and discard.

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.

4. Remove the perforated knock outs from the
new FaST-PAK 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.

Remove the filter screen bowl and clean the filter
screen after every 50 hours of operation. Empty
the solution tank before removing the filter.

NOTE: The FaST-PAK 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 FaST-PAK carton into the
FaST-PAK bracket.
6. Connect the FaST supply hose to the
FaST-PAK hose connector.
7. Scrub with the FaST system for a few
minutes to allow the detergent to reach
maximum foaming.

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129

MAINTENANCE
REPLACING THE FaST SYSTEM FILTERS
Replace the FaST system filters after every 1000
hours of operation. Empty the solution tank before
replacing the filters.

3. Disconnect the ec-H20 system intake hose
from the solution supply hose and connect the
intake flush hose (gray connector) to the
ec-H20 system intake hose.

4. Disconnect the ec-H20 system outlet hose
from the hose to the scrub head and connect
the outlet flush hose (black connector) to the
ec-H20 system outlet hose.

ec-H20 MODULE FLUSH PROCEDURE
This procedure is only required when an alarm
sounds and the ec-H20 system indicator light
begins to blink red.
FOR SAFETY: Before leaving or servicing
machine, stop on level surface, set parking
brake, turn off machine.

5. Place the ec-H20 system intake hose into a
container containing 5 gallons (19 liters) of
white or rice vinegar. Place the outlet hose
into an empty container.

1 . Remove both flush hoses from the storage
bag located behind the operator seat.
2. Lock the operator seat cover open.

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MAINTENANCE
6. Turn the key to the on position without starting
the engine.
7. Press and release the ec-H20 module flush
switch to start the flush cycle.

CLEANING THE ec-H20 FILTER SCREEN
Remove and clean the ec-H20 filter screen after
every 50 hours of operation.

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.
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 1-2 minutes, press the flush
switch to turn off the module.
9. Disconnect the flush hoses from the ec-H20
system intake hose and outlet hose and
return the flush hoses to the storage bag.
1 o. Reconnect ec-H20 intake and outlet hoses. If
the ec-H20 system indicator light continues
to flash, repeat the flush procedure. If the
problem persists, contact an Authorized
Service Center.
11 . Close the operator seat cover.

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131

MAINTENANCE
SQUEEGEE BLADES

6. Loosen the rear retaining band tension latch
and open the retaining band.

FOR SAFETY: Before leaving or servicing
machine, stop on level surface, set parking
brake, turn off machine, and remove key.
Check the squeegee blades for damage and wear
daily. When the blades become worn, rotate the
blades end-for-end or top-to-bottom 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.
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.

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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.

9. Reinstall the rear retaining band aligning the
tabs with the holes.

12. Remove the front squeegee.

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.

10. Tighten the rear retaining band tension latch.
11 . Loosen the front retaining band tension latch
and open the retaining band.

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133

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.

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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.

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135

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.

_1
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.

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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.
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137

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.

4. Drive the machine forward again to recheck
the squeegee blade deflection after
adjustments are made.
5. Readjust the squeegee blade deflection if
necessary.

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, se t parking
brake, t urn 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.
12mm
(0.50 in)

3. To adjust the overall squeegee blade
deflection, turn the adjustment knobs
counterclockwise to increase deflection or
clockwise to decrease deflection.

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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
1 oo hours of operation.

The skirts should be between o to 6 mm
(Oto 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.

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139

MAINTENANCE

BRAKES AND TIRES
BRAKES
The mechanical brakes are located on the rear
wheels. The brakes are operated by the foot
brake pedal and connecting cables.

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.

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.

PROPELLING MOTOR
Torque the shaft nut to 508 Nm (375 ft lb)
lubricated, 644 Nm (475 ft lb) dry, after every 800
hours of operation.

TIRES
Check tires for damage and wear after every 100
hours of operation.

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MAINTENANCE
TRANSPORTING THE MACHINE
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.

1. Raise the squeegee, scrub head, and
brushes. If necessary, raise the hopper for
additional ramp clearance.
FOR SAFETY: When loading machine onto
truck or trailer, drain tanks and empty hopper
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.

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141

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 tie-downs to the opposite ends of
the machine and hook them to the brackets
on the floor of the trailer or truck. Tighten the
tie-down 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 s crub
head and squeegee before tying down
machine.

8. Connect the tie-down 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 no t drive the
machine off the truck or trailer unless the
loading surface is horizontal AND 380 mm
(15 in) or less from the ground.

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MAINTENANCE
MACHINE JACKING

STORAGE INFORMATION

Empty the hopper, 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.
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MAINTENANCE
FREEZE PROTECTION (MACHINES WITHOUT
ec-H20 SYSTEM)

FREEZE PROTECTION (MACHINES WITH
ec-H20 SYSTEM)

FOR SAFETY: Before leaving or servicing
machine, stop on level surface, set pa rking
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 ec-H20 system intake hose
from the solution supply hose and connect the
intake flush hose (gray connector) to the
ec-H20 system intake hose.

4. Press the scrubbing main brush button.
5. Press the 1-STEP 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 1-STEP button to turn off the
sys tem.
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
ec-H20 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.

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MAINTENANCE
5. Turn the key to the on position (without
starting the machine).

6. Press and release the ec-H20 module flush
switch. Allow the system to drain water into
the container for 2 minutes.

7. Press the ec-H20 module flush switch to
shut off the system.
8. Disconnect the ec-H20 system outlet hose
from the hose to the scrub head.

9. Blow pressurized air (less than 344 kPa (50
psi)) into the ec-H20 system outlet hose.
Continue blowing compressed air into the
outlet hose until water no longer drains f rom
the drain tube

1 0. Reinstall the cap onto the drain tube and
insert the tube back between the ec-H20
module and the operator compartment.
11 . Reconnect the ec-H20 system intake hose to
the solution supply hose and the ec-H20
system outlet hose to the hose to the scrub
head.
12. Return the intake flush hose to the storage
bag behind the operator seat.

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MAINTENANCE
PRIMING THE ec-H20 SYSTEM
Prime the ec-H20 system if the machine has
been stored for a long period without water in the
solution tank/ ec-H20 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 ec-H20 system outlet hose
from the hose to the scrub head and connect
the outlet flush hose to the ec-H20 system
outlet hose.

4. Place the ec-H20 system outlet hose into an
empty container.
5. Tum the key to the on position (without
starting the machine).
6. Press and release the ec-H20 module flush
switch. Allow the system to drain water into
the container for 2 minutes.
7. Press the ec-H20 module flush switch to
shut off the system.
8. Disconnect the outlet flush hose from the
ec-H20 system outlet hose and return the
flush hose to the storage bag.
9. Reconnect the ec-H20 system outlet hose to
the hose to the scrub head.

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TROUBLESHOOTING

3. When you see the mode you want to enter, press the
Orange Down Pressure Button to enter that mode.

M20/M30 MEMBRANE PANEL 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. 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. When 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

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M20/M30 PROPANEL SERVICE MODES

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.

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’ .

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.

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.

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.

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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.

5. Press the ‘Orange Down Pressure Button’ to allow
changing the Alternate Solution setting.

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 Orance 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 not used
on the M20 / M30 machines, as only Cylindrical Scrub
Heads are available on these models.
4. Press the right arrow to scroll to the next
configuration option, in this example we will
explore setting the ‘Alternate Solution Options’.

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:
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?

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TROUBLESHOOTING
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.
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’.

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.
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.
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.

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Self Test Name:

Test Description:

1:Enable 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 Configured)

15:RecTnk AF

Tests the Autofill valve for the Recovery Tank. (If Configured)

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.

20:Hopper Door Actuator

Tests the valve which controls the hopper door actuator.

21:Hopper Latch...

Tests the hopper latch.

22:Hopper Up Valve

Tests the valve which controls raising of the hopper.

23:Hopper Down Valve

Tests the valve which controls lowering of the hopper.

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.

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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.
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
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

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.
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’.

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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. 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.

6. Press the right arrow to proceed to the Reverse
Threshold voltage value.

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.
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.

Note: the ‘C’ indicates the Current voltage value
and the ‘N’ indicates the New voltage value you are
setting.

The higher 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.

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.

M20/M30 Service Information

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.

153

TROUBLESHOOTING
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’.
Note: With the setting numbers displayed for the Low
main Scrub Brush Pressure adjustments can be made
to that setting.
Note: The electrical signal transmitted to the control
solenoid is measured in mA (milliamperes).

3. To enter the DOWN PRESSURE ADJUST MODE
for the Main Scrub Brushes, press the ‘Orange
Down Pressure Button’ , again.

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.
4. To enter the ‘L’ (Low Down Pressure Setting
Mode) for the Main Scrub Brushes, press the
‘Orange Down Pressure Button’ , again.

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.

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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.

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 successfully, you
will receive the message ‘Passed’ in the display
window.

Follow the same adjustment procedures outlined for
the Main Scrub Brush Down Pressure Settings.
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.

5. If a button fails to function as designed, you will
receive the message ‘FAILED’ in the display
window.

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
‘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 testing procedures.

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TROUBLESHOOTING
M20/M30 ProPanel Service Modes

3. Press the ‘Gears’ icon.

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.

4. Using the down arrow, scroll to the bottom of the
listed functions.

2. Press the Logout Icon and enter the Service
Mode Login number and press the enter icon.
(083957530)

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M20/M30 PROPANEL SERVICE MODES
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’.

3. Manual Mode allows viewing many component
amperage draws or RPM.

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, press the ‘Check Mark’ icon
twice.

This includes:
M01: Hyd Enable = Hydraulic Enable
M02: MB Act = Main Brush 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

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TROUBLESHOOTING
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.

5. Continuously press the right arrow to scroll to the
desired configuration option and press the ‘Check
Mark’ icon to choose a setting .

2. To enter the CONFIG MODE, press the ‘Check
Mark’ icon.

3. The C1: MainBrushHead choice feature is not
used on the M20 / M30 machines.

4. Press the right arrow to scroll to the next
configuration option and the ‘Check Mark’ icon to
change settings.

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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.

7. Follow the same procedure for other optional
equipment and water flow rate setup.
Including:
•
•
•
•

C1: Side Brush
C6: Seat Switch
C7: Water Level
C8: IRIS Module

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.

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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.

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.

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.

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)
3. The self test will automatically begin.

“Short” (The current draw is over the threshold, indicating a short circuit)

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.
•
•
•
•
•

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.

Test Hydraulic Enable Valve
Test Main Brush Down Actuator
Test Main Brush Motor
Test Main Brush PWM Valve
Test Alternate Solution Pump

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Self Test Name:

Test Description:

1:Enable Valve

Test the valve which enables machine hydraulics.

2:MBrush Down

Tests the valve which controls ‘Main Brush Down’ actuation.

3:MBrush Motor

Tests the valve which controls the Main Brush motor

4:MBrush PWM

Tests PWMed control of the Main Brush Down valve (for down pressure control).

5:MBrush Water

Tests the valve which controls solution delivery to the Main Brush.

6:SBrush Down

Tests the valve which controls ‘Side Brush Down’ actuation.

7:SBrush Ext

Tests the valve which controls ‘Side brush Extension’ actuation.

8:SBrush Motor

Test the valve which controls the Side Brush motor.

9:SBrush PWM

Tests PWMed control of the Side Brush Down valve (for down pressure control).

10:SBrush Water

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.

15:RecTnk AF

Tests the Autofill valve for the Recovery Tank.

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.

20:Hopper Door

Tests the valve which controls the hopper door actuator.

21:Hopper Latch

Tests the hopper latch.

22:HopperUpVlv

Tests the valve which controls raising of the hopper.

23:HopperDownVlv

Tests the valve which controls lowering of the hopper.

24:DetergentPump

Tests the detergent pump.

25:AltPump

Tests the Alternative Solution pump (FAST).

26:AltHighFlow

Tests the High Flow Rate function of FAST.

27:AltSideBrush

Tests the valve which controls alternative solution (FAST/ECH2O) to the Side Brush.

28:ShutdownRelay

Tests the emergency engine shutdown relay.

29:ScrubControlA

Tests CAN communication to node A on the Main Board.

30:ScrubControlB

Tests CAN communication to node B on the Main Board.

M20/M30 Service Information

161

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.

162

The components that can be tested with
Input Display Mode Include:
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•

M20/M30 Service Information

TROUBLESHOOTING
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.

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.

M20/M30 Service Information

5. Note: the ‘C’ indicates the Current voltage value
and the ‘N’ indicates the New voltage value you
are setting.
6. Press the ‘minus’ icon to reduce the N (New) value and
the ‘Positive’ icon to increase the N value.
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.

7. Press the right arrow to proceed to the Reverse
Threshold voltage value.

8. 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.

163

3. To enter the DOWN PRESSURE ADJUST MODE
for the Main Scrub Brushes, press the ‘Check
Mark’ icon.

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).

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.

4. To enter the ‘L’ (Low Down Pressure Setting
Mode) for the Main Scrub Brushes, press the
‘Check Mark’ icon.

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.
You can press the ‘Right Arrow’ icon again to
move to the Main Sweeping Brush Down Pressure
Adjust Mode and again for the Side Sweeping
Brush Down Pressure Adjust Mode.
Follow the same adjustment procedures outlined
for the Main Scrub Brush Down Pressure Settings.
NOTE: Refer to the ‘Default Down Pressure List’ below, for
the factory default down pressure settings.

164

M20/M30 Service Information

TROUBLESHOOTING
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.

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.

Main Sweep Brushes:
•
•
•

Cyl. Low Pressure Default Setting, 250mA.
Cyl. Medium Pressure Default Setting, 310mA.
Cyl. High Pressure Default Setting, 350mA.

Side Scrub Brush:
•
•
•

Low Pressure Default Setting, 600mA.
Medium Pressure Default Setting, 675mA.
High Pressure Default Setting, 730mA.

Side Sweep Brush:
•
•
•

Low Pressure Default Setting, 570mA.
Medium Pressure Default Setting, 570mA.
High Pressure Default Setting, 570mA.

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.

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.

M20/M30 Service Information

165

TROUBLESHOOTING

166

M20/M30 Service Information

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