934 0124 Onan MDL3 MDL4 MDL6 Marine Genset Operator's Manual (03 1992)
User Manual: 934-0124 Onan MDL3 MDL4 MDL6 Marine Genset Operator's manual (03-1992)
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MDL3 MDL4 MDL6 I Printed in U S A . 3-92 I- 934-0124 EXHAUST GASES ARE DEAQLY ELECTRICAL SH8 l n s p ctiuel system before eachoperat;onand periodically M WILL CfiUSE SEVERE PERSONAL INJURY OR OEATH ;~,uh 5:. running. Redistribution or publication of this document, by any means, is strictly prohibited. opy and post these suggestions In potential hazard arms 81 the vessel. Table of Contents SECTION TITLE PAGE .............................. Inside Front Cover INTRODUCTION ................................................... 1-1 SAFETY PRECAUTIONS 1 2 3 4 About This Manual ................................................ 1-1 How to Obtain Service ............................................. 1-1 SPEC1FlCATlONS .................................................. 2-1 MDL3 .......................................................... 2-1 MDL4 .......................................................... 2-2 MDL6 .......................................................... 2-3 OPERATION ...................................................... 3-1 3-1 General ......................................................... Pre-Start Checks ................................................. 3-1 ControlPanel .................................................... 3-2 Starting ......................................................... 3-3 Stopping ........................................................ 3-3 Operating Recommendations ........................................ 3-4 Troubleshooting .................................................. 3-4 MAINTENANCE .................................................... 4-1 General .........................................................4-1 Periodic MaintenanceSchedule ...................................... 4-1 Setlnspection .................................................... 4-2 LubncationSystem................................................ 4-2 Cooling System .................................................. 4-3 Fuelsystem ..................................................... 4-5 ValveClearance .................................................. 4-7 4-7 Battery ......................................................... AC Generator .................................................... 4-8 Out-of-ServiceProtection ........................................... 4-8 i Redistribution or publication of this document, by any means, is strictly prohibited. Redistribution or publication of this document, by any means, is strictly prohibited. Section 1 Introduction ABOUT THIS MANUAL RECREATIONALVEHICLES-EQUIPMENT, PARTS AND SERVICE. This manual provides information for operating and maintainingthe genset. Study this manual carefully and observe all warnings and cautions. Using the genset properly and following a regular maintenance schedule will contribute to longer unit life, better performance, and safer operation. For the name of your local Cummins/Onan or Onan-only distributor in the United States or Canada, call 1-800-888-ONAN (This automated service utilizes touch-tone phones only). By entering your area code and the first three digits of your local telephone number, you will receive the name and telephone number of the distributor nearest you. HOW TO OBTAIN SERVICE When the genset requiresservicing, contact your nearest dealer or distributor. Factory-trainedParts and Service representatives are ready to handle all your service needs. For the name of your local Cummins-only distributor, or if you need more assistance, please call Onan Corporation, 1-612-574-5000, 7:30 AM to 4:OO PM, Central Standard Time, Monday through Friday. If unable to locate a dealer or distributor, consult the Yellow Pages. Typically, our distributors are listed under: When contacting your distributor, always supply the complete Model Number and Serial Number as shown on the genset nameplate. GENERATORS-ELECTRIC, ENGINES-GASOLINEOR DIESEL, OR INCORRECTSERVICE OR REPLACEMENTOFPARTS CAN RESULTIN SEVERE PERSONAL INJURY, DEATH, AND/OR EQUIPMENT DAMAGE. SERVICE PERSONNEL MUST BE QUALIFIED TO PERFORM ELECTRICAL AND/OR MECHANICAL SERVICE. DC CONTROL BREAKER (EMERGENCY STOP) START/STOP SWITCH FIELD BREAKER (3-PHASE MODELS) OPTIONAL OIL FILL COOLANT FILL AIR INTAKE RESONATOR OPTIONALAC LINE CIRCUIT BREAKER (NOT SHOWN) NAMEPLATE (NOT SHOWN) OIL nu RUNNING TIME METER INJECTION PUMP FAULT RESET BREAKER OPTIONAL METERS DIPSTICK FUEL INLET FlmNG FUEL FILTER FUELPUMP OIL DRAIN VALVE OIL FILTER sa377 FIGURE 1-1. TYPICAL MDL-SERIES GENSET (MDL4 SHOWN) 1-1 Redistribution or publication of this document, by any means, is strictly prohibited. Redistribution or publication of this document, by any means, is strictly prohibited. Section 2. Specifications MDL3 GENERATOR DETAILS Type ........................................... Onan@,Revolving Field, %Pole, Brushless Ratings, General Marine: 60 Hertz, 3-phase ........................................... 15 kW, 18.75 kVA at 0.8 PF 15 kW, 15 kVA at 1.0 PF l-phase ............................................. 50 Hertz, 3-phase ............................................. 12 kW, 15 kVA at 0.8 PF l-phase ............................................. 12 kW, 12 kVA at 1.0 PF 60 Hertz, 3-phase ........................................ 12.5 kW, 15.625 kVA at 0.8 PF l-phase .......................................... 12.5 kW, 12.5 kVA at 1.0 PF 50 Hertz, 3-phase ............................................ 10 kW, 12.5 kVA at 0.8 PF 10 kW, 10 kVA at 1.0 PF 1-phase ............................................. AC Voltage Regulation: ~ 2 % Electronic Regulation ........................................................... MagneticRegulation ............................................................ *5% ENGINE DETAILS Engine Model ...................................................... CumminsQ 3A1.7 Engine Speed (r/min) 1800/1500 Fuel ................................................................... No.2Diesel Average Fuel Consumption: 50 Hertz,12.0 kW, Full Load ......................................... 1.3 gph (4.9 Uh) Half Load .........., ............................ 0.50 gph (1.89 Uh) 10.0 kW, Full Load ......................................... 1.1 gph (4.2 Uh) Half Load ......................................... 0.6 gph (2.3 Uh) 60 Hertz, 15.0 kW, Full Load ......................................... 1.6 gph (6.1 Uh) Half Load ......................................... 0.8 gph (3.0 Uh) 12.5 kW, Full Load ........................................ 1.34 gph (5.1 Uh) 0.74 gph (2.8 Uh) Half Load ........................................ .1/4-18 NPTF Fuel Inlet Size ......................................................... Fuel Return Outlet Size. ................................................... 1/8-27 NPT Exhaust Outlet Hose Fitting ............................................ 2.5 in. (64 mm) OD Battery Requirements: Cold Cranking Amps,@ Oo F (-1 8' C) .............................................. 500 Battery Voltage, Standard System .................................................. 12 1 *QuantityRequired ............................................................. Cooling System Capacity ................................................ 10 quarts (9.4 L) Engine Oil Capacity (Filter, Lines, Crankcase) ................................. 6 quarts (5.7 L) Total Air Per Minute Required (Generator Cooling and Combustion): 60 Hertz ................................................... 344 cu. ft./min (9.8 rn3/min) 50 Hertz .................................................. 287 cu. ft./min (8.2 rn3/rnin) Sea Water Flow Rate: 60Hertz .......................................................... 15gpm(57Umin) 50 Hertz ........................................................ 12.5 gpm (47 Urnin) '24-Votl Optional System ..................................................... 2-1 Two 12-VoIt Batteries In Series Redistribution or publication of this document, by any means, is strictly prohibited. MDL4 GENERATOR DETAlLS Type ........................................... Onan@,Revolving Field, 4-Pole, Brushless Ratings, General Marine: 60 Hertz, 3-phase ............................................. 20 kW, 25 kVA at 0.8 PF 1-phase ............................................. 20 kW, 20 kVA at 1.0 PF 50 Hertz, 3-phase ............................................. 16 kW, 20 kVA at 0.8 PF 16 kW, 16 kVAat 1.0 PF 1-phase ............................................. AC Voltage Regulation: ElectronicRegulation ...........................................................%. MagneticRegulation ............................................................ 5% * ENGINE DETAILS Engine Model ........................................................ Cummins@4A2.3 EngineSpeed(r/min) ........................................................ 1800/1500 Fuel .................................................................... No.2Diesel Average Fuel Consumption: 50 Hertz, Full Load ................................................. 1.7 gph (6.4 Uh) 1.0 gph (3.8 Uh) Half Load ................................................. 60 Hertz Full Load ................................................. 2.1 gph (7.9 Uh) 1.2 gph (4.5 Uh) Half Load ................................................. Fuel Inlet Size .......................................................... 1/4-18 NPTF Fuel Return Outlet Size. ................................................... 1/8-27 NPT Exhaust Outlet Hose Fitting ............................................2.5 in. (64 mm) OD Battery Requirements: 500 Cold Cranking Amps @ Oo F (-1 8" C) .............................................. Battery Voltage, Standard System .................................................. 12 *QuantityRequired ............................................................... 1 Cooling System Capacity ................................................ 10 quarts (9.4 L) 6 quarts (5.7 L) Engine Oil Capacity (Filter, Lines, Crankcase) ................................. Total Air Per Minute Required (Generator Cooling and Combustion): 60 Hertz ................................................. 359 cu. ft./min (10.2 m3/min) 50 Hertz .................................................. 298 cu. ft./min (8.5 m3/min) Sea Water Flow Rate: 60Hertz .......................................................... 15gpm(57Umin) 50 Hertz ........................................................ 12.5 gpm (47 Umin) *24Volt Optional System ..................................................... 2-2 Two 12-Volt Batteries In Series Redistribution or publication of this document, by any means, is strictly prohibited. MDL6 GENERATOR DETAILS Type ........................................... Onan@,Revolving Field, 4-Pole, Brushless Ratings, General Marine: 30 kW, 37.5 kVA at 0.8 PF 60 Hertz General Marine Rating, 3-phase ......................... l-phase .......................... 30 kW, 30 kVA at 1.0 PF 50 Hertz General Marine Rating, 3-phase ........................ 25 kW,31.25 kVA at 0.8 PF l-phase .......................... 25 kW, 25 kVA at 1.0 PF AC Voltage Regulation: Electronic Regulation ........................................................... k2% MagneticRegulation ............................................................ 5% * ENGINE DETAILS Engine Model ....... CumminsB 6A3.4 Engine Speed (r/min) . 1800/1500 No.2Diesel Fuel .................................................................... Average Fuel Consumption: 50 Hertz, Full Load ................................................. 2.6 gph (9.6 Uh) Half Load ................................................. 1.5 gph (5.7 Uh) 60 Hertz Full Load ............................................... 2.92 gph (10.8 Uh) 1.68 gph (6.2 Uh) Half Load ................................................ Fuel Inlet Size .......................................................... 1/4-18 NPTF 1/8-27 NPT Fuel Return Outlet Size. ................................................... Exhaust Outlet Hose Fitting ............................................ 2.5 in. (64 mm) OD Battery Requirements: Cold Cranking Amps @ 0"F (-1 8" C) .............................................. 500 Battery Voltage, Standard System .................................................. 12 *Quantity Required ............................................................... 1 Cooling System Capacity ................................................ .3.3 gal. (12.5 L) Engine Oil Capacity (Filter, Lines, Crankcase) ................................. 9 quarts (8.5 L) Total Air Per Minute Required (Generator Cooling and Combustion): 60Hertz ................................................. 390cu.ft./min (11.1 mVrnin) 50 Hertz .................................................. 325 cu. ft./min (7.1 m3/min) Sea Water Flow Rate: 60Hertz .......................................................... 24gpm(91 Umin) 50Hertz .......................................................... 20gpm(76Umin) *24-VoR Optlonal System ..................................................... Two 12-Volt Batteries In Series Redistribution or publication of this document, by any means, is strictly prohibited. 2-3 Redistribution or publication of this document, by any means, is strictly prohibited. Section 3. Operation IAWARNING] EXHAUST GAS IS DEADLY! Exhaust gases contain carbon monoxide, an odorless and colorless gas. Carbon monoxide is poisonous and can cause unconsciousness and death. Symptoms of carbon monoxide poisoning can include: Throbbing in Temples Muscular Twitching Vomiting lnability to Think Coherently Dizziness Nausea Headache Weakness and Sleepiness IF YOU ORANYONEELSE EXPERIENCEANY OF THESE SYMPTOMS, GETOUT INTO THE FRESH AIR IMMEDIATELY. I f symptoms persist, seek medical attention. Shut down the unit and do not operate until it has been inspected and repaired. Never sleep in the vessel with the generator sef running unless the vessel interior is equipped with an operating carbon monoxide defector. Protection against carbon monoxide inhalation also includesproperexhausf system installation and visual and audible inspection of the complete exhaust system at the start of each generator set operation. W A R ” G I The sudden release of hot pressurized GENERAL coolant can result in serious personal injury. Remove the expansion tank pressure cap slowly after the engine has cooled. This section covers starting and operating the genset. Read through this entire section before attempting to start the genset. It is essential that the operator be completely familiar with the genset. Fuel Make sure the fuel tanks are full and the fuel system is primed for operation (see Maintenance section). PRE-START CHECKS Exhaust Before starting, be sure the following checks have been made and the unit is ready for operation. Make sure the exhaust system components are tightly connected and not corroded. Refer to the Maintenance section for the proper procedures. Sea Water Pump Priming Before beginningoperation (initialstart-up) the seawater pump should be primed. The priming water provides an impeller surface lubricant until flotation water is pulled into the pump. Lubrication Check the engine oil level. Keep the oil levelnear as possible to the dipstick full mark. Do not overfill. To prime the pump, close the sea cock and remove hose from the water filter outlet. Fill hose and pump with clean water. Replace hose and open sea cock. Check for pump operation on start-up by observing water discharge from exhaust outlet. Coolant The coolant level should be near the top of heat exchanger fill cap. Do not check while the coolant is hot. 3-1 Redistribution or publication of this document, by any means, is strictly prohibited. charge system operation. See Battery portion of the Maintenance section. CONTROL PANEL The following describes the function and operation of the genset controls. All instruments and control switches are located on the face of the control panel as illustrated in Figure 3-1. Coolant Temperature Gauge (Option, 12-and 24-volt 0nly):Shows engine,coolanttemperature. The gauge is wired to a sensor on the engine and has a range of 100" to 250° F (40" to 121" C). GaugedMeters and Switches Start-Stop Switch: Starts and stops the genset locally. When switch is released, the genset can be operated from a remote switch connected to the control panel. Oil Pressure Gauge (Option): Shows engine lubricating oil pressure. The gauge has a range of 0 to 100psi (0 to 700 kPa) and is connected to an engine sensor. Running Time Meter: Registers the total number of hours that the unit has run. Useful for determining need for periodic maintenance procedures. Time is cumulative and cannot be reset. Low Coolant Level Shutdown (Option): A sensor located in the engine,cooling system closes a switch to shut down the engine if coolant level is too low. Oil Pressure Gauge (Mechanical, Option): Connects directly to the engine oil line on side of engine. It has a range of 0 to 100 psi (0 to 700 kPa). DC Voltmeter (Option, 12- and 24-volt Only): Monitors B+ voltage useful to determine battery condition and DC CONTROL BREAKER (EMERGENCY STOP) DC BREAKER (MDLG ONLY) / \ FIELD BREAKER (ELECTRONIC REGULATIONONLY) I DC BREAKER ~!$~~~","pp,E,",~,"~~$ FAULT START/STOP-PREHEAT SWITCH RUNNiNGTlME METER FIGURE 3-1. CONTROL BOX FRONT PANEL 3-2 Redistribution or publication of this document, by any means, is strictly prohibited. Circuit Breakers 2. Release switch and press the Start position. This activates the engine control, glow plugs and starting system. The starter will crank and after a few seconds the engine should start. The starter will disconnect if switch is released, or when the generator AC voltage reaches about 90 volts AC. Fault Reset;A manual reset breakerthat shuts down the engine for low oil pressure, high coolant temperature, high exhaust temperature, overspeed (optional for MDL3), and optional low-coolant level. Emergency Stop DC Control Breaker: A 15-ampere breaker providingprotectionto the control box wiringand remote wiring from short circuits or overload. Also serves as an emergency stop switch and control disable for service. 3. If the engine does not start after cranking 30 see onds, releasethe Start switch. Wait two minutes and then repeat Steps 1 and 2. 1- Excessive cranklng periods can owerheat and damage the starter. Do not engage starter forperiods longer than 30 seconds without allowing two minutes for cooling. Line Circuit Breakers (Option): Protects generator from ashort circuit or other overload. When furnishedby Onan, they mount on the control box. Replacements must meet ABYC specs for proper protection. 4. If the engine does not start on second try, check the Field Breaker (Electronic Regulators Only):A 3 am- fuel supply and be sure the fuel system has been primed. If the genset runs out of fuel, the fuel system may need priming before it will start. See Fuel System in the Maintenance Section. pere breaker providing generator field protection if the voltage regulator fails. DC Breaker; Connects B+ to the control and trips if a short or overload occurs. Model MDL6 gensets have the breaker located on the left side of the control panel because of its physical size and larger ampere rating. On Model MDL4 Spec "A" gensets, the DC breaker was replaced by a fuse holder located between the starter terminal and the control box. Start-up Checks Check optional gauges on the control after the engine has started. Observe the oil pressure gauge immediately. Oil Pressure Gauge:The oil pressure should be in the range of 30 to 55 psi (207 to 380 kPa) when the engine is at operating temperature. STARTING This section covers starting of the genset at the control panel and the remote panel (when used). DC Voltmeter: Battery voltage during operation is dependent upon battery state-of-charge, but should be 13.5 to 15 volts on a 12-volt system; 27 to 30 volts on a 24-volt system . Starting at Control Panel The following steps outline the correct procedures for starting the genset at the genset control panel, or from a remote control location. The DC Breaker must be in ON position. Wafer Temperature Gauge: The water temperature should be in the range of 165" to195" F (74"to 91O C) depending on the load and ambient temperature. 1, Hold the Start-Stop switch in the Stop/Preheat position for 10 to 30 seconds depending upon temperature as shown below in Table 3-1. Do not exceed 30 seconds. STOPPING Before Stopping lacnvnol\r] Preheat time longer than 30 seconds may damage glow plugs. Run the genset at no load for three to five minutes before stopping. This allows the lubricatingoil and engine coolant to carry heat away from the combustion chambers and bearings; TABLE 3-1. PREHEAT TIME VS TEMPERATURE Ambient Temperature Above 86" F (30" C) Between SO" to 86" F (IO" to 30" C) Preheat Time Abuut 10 seconds About 15 seconds 1- Failure to allow running .timeforengine cooling without load can result in engine damage. Make sure the generafor set runs unloaded for at least three minutes. To Stop: Hold the Start-Stop/Preheat switch, or the remote control switch in the Stop position. (0"to 10" C) Below 32" F (0" C) About 30 seconds 3-3 Redistribution or publication of this document, by any means, is strictly prohibited. engine exterior for leaks and repair as necessary. The oil pressure switch actuates the fault circuit if pressure drops below 14 psi (97 kPa). OPERATING RECOMMENDATIONS B reak-In Drain and replace the crankcase oil and reset the valve lash after the first 50 hours of operationon new gensets. Refer to the Maintenance Section of this manual. High Coolanf Temperature:If fault occurred during operation, observe Coolant Temperature Gauge (option) for indication of temperature over 222" F ( 1 0 6 O C). The coolant thermostat switch closes at this temperature and actuates the fault circuit. No-Load Operation Hold periods of genset no-load operationto a minimum and avoid if possible. No-load operation (other than before stopping after delivering load) allows combustion chamber temperatures to drop so low that the fuel does not bum completely. This results in carbon deposits which can clog injectors, cause pistonringsand valves to stick, and can cause cylinderglazing. If it is necessary to runthe enginefor long periods, connect an electrical load to the generator. Check coolant level in the expansion tank alter allowing the engine to cool. Check condition of the pump belt and that it has proper tension. The sea water flow at the exhaust outlet should be as shown in the Specifications Section. Also check the cooling system cleanliness (freedom from contaminants, rust, sludge build-up, etc). Exercise Period To avoid some engine wear, exercise the genset a mini- MDL3 mum of 30 minutes at least once a week. Run the genset with a load applied to allow the engine to reach normal operating temperature. Exercising will keep the engine parts lubricated, maintain fuel prime, and prevent relay contacts from oxidizing. Top off the fuel tank after each exercise period. MDL6 TROUBLESHOOTING DC Control The DC control has a number of sensors that continuously monitor the engine for abnormal conditions such as low oil pressure, high coolant temperature, high exhaust temperature, overspeed (option on MDL3), and Iowcoolant level (option). If any one of these conditions occur, the fault breaker trips and stops the genset. See Figure 3-2. SURE SWITCH *LOW COOLANT LEVEL SENSOR MDL4 The following sections describe operation of the fault systems and suggested items the operator can check. If a major problem is indicated, contact an Onan Dealer or Distributor for help or service. The control panel Fault reset breakerwill trip for any one of the fault conditions described separately in the following text. The white breaker reset button pops out about 1/4 inch (6 mm) when a fault occurs. Locate the problem and make necessary corrections before resetting the breaker and starting the genset. All fault shutdowns except high exhaust temperature and overspeed are delayed 5 seconds to avoid nuisancetripping. OPTIONAL OVERSPEED SWITCH (UNDER ENDBELL COVER) \' SC13TI-2 *HIGH WHAUST TEMP. SWITCH FAUL? RESET BREAKER *SAME LOCATION ALL MODELS Low Oil Pressure: Remove dipstick and check oil level. If low, add oil to bring level up to the full mark. Inspect FIGURE 3-2.FAULT SENSOR LOCATION 3-4 Redistribution or publication of this document, by any means, is strictly prohibited. Field Breaker (ElectronicRegulafor 0nly):This 3-ampere breaker is located on the control side panel. It is in the regulator AC input circuit and protects the generator field if the voltage regulator fails and places abnormal demands on it. If resettingthe breaker returns power only momentarily, then trips again, consult an Onan dealer or distributorfor service. High Exhaust Temperature: The high exhaust temperature switch is mounted on the exhaust elbow and closes on temperature nse above 190" F (88"C). It will open againwhen temperature reaches about 165"F (74' C) and functions to protect exhaust system hoses. 1-1 inhalation of exhaustgas can cause serious personal injury or death. Do not disconnect or bypass fhe exhaust elbow switch. Excessive heat caused by a sea water flow malfunction will damage the exhausthosesandcause exhaustgasleakage. If exhausthose Is damaged, shut off the generator set immediately and do not operate until hose is repaired. i I Line Circuit Breakers (Option): When supplied by Onan, these breakers are mounted on the control side panel. They are connected in series with the load. High exhaust elbow temperature is caused by insufficient or lackof seawaterflow. Refertothespecifications Section for the proper sea water flow rate. Overspeed(0pfion ForMDL3):This switch is mounted on the front of the engine crankshaft. It is factory adjusted to shut down 60 hertz gensets at 2150 to 2200 r/min, 50 hertz gensets at 1800to 1850 r/min. After correcting the problem, press the Fault Reset breaker. *LINE CIRCUIT Low Coolant Level (Option): This electronic sensor completes the fault circuit if coolant level falls below the sensor's location in the cooling system. It provides an added level of engine protection. *FIELD BREAKER AC Control REGULATORS ONLY) The AC control may use two circuit breakers on the control box depending upon purchased options. See figure 3-3. If either one trips, it results in loss of generator AC power output. They function as follows: *SAME LOCATION ALL GENSET MODELS SG13753r FIGURE 3-3. AC CONTROL BREAKERS 3-5 Redistribution or publication of this document, by any means, is strictly prohibited. Redistribution or publication of this document, by any means, is strictly prohibited. J i Section 4.Maintenance quired and then refer to the sections that follow for the correct service procedures. GENERAL Establish and adhere to a regular schedule for maintenance and service. If the genset will be subjectedto extreme operation conditions, the service intervals should be reduced accordingly as indicated in Table 4-1. 9 * 7 1 Accidental startlng of the generator set can cause severe personal injury or death due tu electrocution or contact with rotatingparfs. Disconnect the starting battery cables (negative [-I cable first) when repairs are made to the engine, controls, or generator. Consultwith an authorized Onan@Dealeror Distributorif the genset will be subjected to any extreme operating conditions (high surroundingtemperature, dusty air conditions, etc.), and determinea suitable schedule of maintenance. Usethe runningtime meterto keep an accurate log of all service performed for warranty support. Perform all service at the time period indicated or after the number of operating hours indicated whichever comes first. Use the scheduleto determine the maintenancere- The negative (-) cable is disconnected firsf to prevenf arcing If the tool accidentally touches the frame or other grounded metal parts of the set while disconnecting the positive (i) cable from the battery. Severe injury can result if arcing ignites the explosive hydrogen gas given o f fby the battery. TABLE 4-1. PERIODIC MAINTENANCE SCHEDULE I I P A G E " Check Valve Clearance I I See Notes 2,41 I x2,4 4-2 4-3 4-4 4-5 4-3 4-7 4-4 4-4 4-8 4-6 4-7 1- Check for oil, fuel, cooling and exhaust system leaks. Check exhaust system audibly and visually with genset running and repair any leaks immediately. 2- Perform after first 35 hours of operation on new sets. 3 - Perform more often if in extremely dusty conditions. 4 - Contact Onan authorized service dealer or distributor. c 4-1 Redistribution or publication of this document, by any means, is strictly prohibited. SET INSPECTION lgnitlon of explosive battery gases can cause severe personal injuty. Do not smoke. Wear goggles and protective, rubber gloves and apron when servicing batteries. During operation, be alert for mechanical problems that could create unsafe or hazardous conditions. The following sections cover several areas that should be frequently inspectedfor continued safe operation. Mechanical With the genset stopped, checkforloose belt and fittings, leaking gaskets and hoses, or any signs of mechanical damage. If any problems are found, have them cor- Engine Gauges Check the following while the genset is operating. 011 Pressure Gauge (Option): The oil pressure should be in the range of 30 to 55 psi (207 to 380 kPa) when the engine is at operating temperature. rected immediately. With the genset running, listen for any unusual noises that may indicate mechanical problems and check the oil pressure frequently. Investigate anything that indicates possible mechanical problems. Coolant TemperatureGauge (Option):The water temperature should be in the range of 165O to 195O F (74" to LUBRICATION SYSTEM The engine oil was drained from the crankcase prior to shipment. Before the initial start, the lubricationsystem must be filled with oil of the recommended classification and viscosity. Refer to the Specifications section for the lubricating oil capacity. 91O C) depending on the load and ambient temperature. DC Voltmeter(Option): Normal battery voltage during operation should be 13.5 to 15 volts on a 12-voltsystem; and 27 to 30 volts on a 24-volt system. Oil Recommendations Recommended engine oil viscosities are 15W-40, 30, 2OW-20, and 1OW meeting the American Petroleum Institute (API) classification CD/SG, CD/SF, or Military Specification MlL-L-2104C. When a 5W-20 or 5W-30 oil is required, it must be a synthetic oil meeting Military Specification MIL-L-46167, MIL-L-2104C, or MIL-L-46152B. Viscosity 5W-20 and 5W-30 mineral base oils are not recommendedfor use in the engine under any condition. Exhaust System With the genset operating, inspect the entire exhaust system including the exhaust manifold, exhaust elbow, muffler and exhaust pipe. Check sea water pump operation by observing sea water discharge from the exhaust outlet (see Specifications section for flow rate). Visually and audibly check for leaks at all connections, welds, gaskets, and joints. If any leaks are detected, have them corrected immediately. TABLE 4 -2. OIL VISCOSITY VS TEMPERATURE 7 1 Inhalation of exhaust gases can result In severe personal injury or death. Inspect exhaust system audibly and visually forleaks daily. Repair any leaks immediately. i Fuel System With the genset operating, inspect the fuel supply lines, return lines, filters, and fiiings for leaks. Check flexible sections for cuts, cracks and abrasions so they are not rubbing against anything that could cause breakage. 1- Fuel leakage will create a fire hazard whlch can result in severe personal injury or death if ignlted. Whlle checking for leaks, do not smoke or allow any spark, flame, pilot light or other ignltion source In the area. I f any leaks are detected, have them corrected immediately. DC Electrlcal System With the genset off, checktheterminals on the battery for clean and tight connections. Loose or corroded connections create resistance which can hinder or prevent starting. Clean and reconnect the terminals if loose. Always disconnect the negative (-) battery cable first, and connect it last to reduce the possibility of arcing. El 0281 Engine Oil Level Check the engine oil level during engine shut-down periods at intervals specified in Table 4-1. The oil dipstick 4-2 Redistribution or publication of this document, by any means, is strictly prohibited. appropriate SAE viscosity grade as indicated in the Oil Recommendations section. and oil fill are located on the side of the engine (see Figure 4-1). The dipstick is stamped with FULL and ADD marks to indicatecrankcase oil level. For accurate readings, stop the engine and wait about 10minutes. This allows oil drainage into the crankcase before checking. Keep the oil level near as possibleto the FULL mark on dipstick. Remove the oil fill cap and add oil of the same quality and brand when necessary. Engine Oil Change: Run the engine until thoroughly warm before drainingthe oil. Stop engine, open the drain valve (Figure 4-1) and drain oil into a container. When completely drained, close valve and refill the crankcase with new oil of proper classification and grade. 1- Hot crankcase oil can cause burns ifIt Is spil/ed orsplashed on skin. Keep flngersand hands clear when removing the oil drain plug and wearpro- 1- Do not operate the engine wlfh the oil /eve/below the ADD mark or above the FULL mark. 0verf;llingcan cause foaming or aeration of the 011 while operation below the ADD mark can cause loss of oil pressure. tecflve clothing. Oil Filter Change: Spin off the oil filter and discard it. Thoroughly clean filter mounting surface. Apply a thin film of oil to filter gasket, and spin filter on by hand until gasket just touches the mounting pad. Then turn an additional 1/2 turn. Do not over-tighten. ! With oil in the crankcase, start the genset and check for leakage around the filter gasket. Tighten only as necessary to eliminate leaks. COOLING SYSTEM The cooling system was drained prior to shipping and must be refilled before genset is operated. See the Specifications section for the appropriate model capao ity. Coolant Requirements A satisfactory engine coolant inhibits corrosion and protects against freezing. A 50/50solution of ethylene glycol anti-freeze and water is recommendedfor normaloperation and storage periods. Choose only a reliable brandof anti-freezethat contains a rust and corrosion inhibitor but does not contain a stop-leak additive. Do not exceed a 50/50mixture of ethylene glycol and water. A stronger mixture of ethylene glycol will alter heat transfer properties of the coolant. A 50/50 mixture will provide freeze protection to -34" F (-37O C) as measured with an accurate hydrometer. The water usedfor engine coolant should be clean, low in mineral content, and free of any corrosive chemicals such as chloride, sulfate, or acid. Use distilled or soft water whenever available. Well water often contains lime and other minerals that eventually can clog the heat exchanger core or reduce cooling efficiency. Filling the Cooling System b Oil and Filter Change Verify that the block drain valve is closed and all hose clamps secure. Remove the cooling system pressure cap on the exhaust manifold and slowly fill the system with recommended coolant. Changethe oil and filter at the intervalsrecommended in Table 4-1. Use oil that meets the API classification and Leave the pressure cap off the exhaust manifold and start the genset. As trapped air is expelled from the sys- FIGURE 4 -1. ENGINE OIL 1 4-3 Redistribution or publication of this document, by any means, is strictly prohibited. tem, the coolant level may drop and additional coolant can be added. Replace the pressure cap when coolant level is stable. Any excess coolant will be expelled through the overflow hose and into the recovery tank. Coolant Recovery Tank: Fill the recovery tank with coolant mixture to the COLD mark. Operate the genset until normal operating temperature is maintained as observed on the temperature gauge (option), or about 15 minutes of operation. Stop the genset and let cool. Add coolant into the recovery tank (if needed) to the COLD mark. The level should stabilize after several operation cycles. Pressure Cap Closed cooling systems make use of a pressurized cap to increase the boiling point of the coolant and allow higher operating temperatures. The pressure cap should be replaced every lwo years, or sooner if it malfunctions. The cap is rated at 7 psi (48 kPa). Coolant Level Checkthe coolant level daily as specified in Maintenance Table 4-1. Add the required coolant if needed as specified above. 'a 7 1 Contact with hot coolant can result In serious burns. Do not bleed hot, pressurized coolant froma closed cooling system. SEA'WATER DRAIN PLUG HEATMCHANGER CAPTIVE WATER DRAIN PLUGS 1- The high engine temperature switch will shut down the engine in an overheat condition onlylfthecoolantlewellshigh enough to cunfactthe switch. Loss of coolant willallowengine to overheat without shutdown protection, thereby causing severe damage to the engine. l fis imperative that adequate engine coolant levelsbe maintained foroperation lntegrlfy of the cooling system and coolant shutdown protectionFlushing and Cleaning The cooling system should be drained, flushed, and refilled yearly with new coolant for efficient operation and protection. The heat exchanger drains and cylinder block pluglvalve must be opened to drain the system completely. See Figure 4-2. Remove the pressure cap to facilitate draining. 1-1 Contact with hot coolant can result in serious burns. Do not bleed hot, pressurized coolant froma closed cooling system. Chemical Cleaning:Use a chemical cleaner if the cooling system shows rust and scale collectingon the engine water jacket, or in the heat exchanger. Rust and scale slow down heat absorption and can block the coolant flow. Use a good cleaning compound and follow the supplier's instructions. Flush1ng:Aftercleaning, or beforefillingthe systemwith new coolant, drain the system and fill with clean water. Operate the genset for 10 minutes, then drain the system completely. Refill with the recommended coolant. 1- Adding cold coolant to a warm or hot engine can result in engine damage. CYLINDER BLOCK DRAIN PLUGNALVE (SIMILAR LOCATIONALL MODELS) FIGURE 4 -2. LOCATION OF BLOCK DRAIN PLUGNALVE Pump Belt Access to the belt is made by removing the belt guard from the front of the genset. Before removing the belt guard, be sure to disable the genset by removingthe battery cables-the negative (-) cable first. Do not operate the genset without the belt guard in place. 1- Accidental starting of the generator set can cause severe personal injury or death. Stop the generator set and disable by disconnecting the starting battery cables (negative[-]cable first) when maintenance or repairs are made to the engine, controls, or generator. Check belt for ply separation, fraying and glazing which gives a belt a shiny appearance. Inspect both sides of the belt, and replace it if any of these conditions exist. Redistribution or publication of this document, by any means, is strictly prohibited. Belt tension measuredby a belt tensiontool should be 60 pounds (267 N). To adjust tension, loosen bolt that passes through elongated slot in the sea water pump bracket and slide pump until proper tension is secured. See Figure 4-3. 1-1 ignition of fuel can cause serious personal Injury or death by fire or explosion. Do notpermit any flame, cigarette, pllot light, spark or other Ignifer near the fuel system. Fuel Recommendations UseASTM 2-D (no. 2 Diesel)or ASTM l - D (No.1 Diesel) fuel with a minimumcetane number of 45. Number2 diesel fuel gives the best economy and performance under most operating conditions. Use number 1 diesel fuel when ambient temperatures are below 32" F (0"C) and during long periods of light engine load. Use low sulfur content fuel having acloud point of at least 10 degrees below the lowest expectedfuel temperature. Cloud point is the temperature at which wax crystals begin to form in diesel fuel. 3 Fuel Handling Precautions m39 CHECK TENSION Take appropriate precautions to preventthe entrance of dirt, water or other contaminantsintothe fuel system. Filter or strain the fuel as the tank is filled. 1- Dirt or water in the system will cause severe damage to both the injection pump and the injection nodes. It is extremelyimporfant the fuel be kept clean and wafer free. ADJUSTHERE To avoid condensation problems, keepfuel supply tanks FIGURE 4 3.PUMP BELT ADJUSTMENT as full as possible by filling up each time the genset is used. Incoldweather, warm fuel returningfrom the injeo tors heats the fuel in the supply tank. If the fuel level is low, the upper portion of the tank tends to form condensation. In warm weather, both the fuel and the tank will be warm during the daytime. At night, cool air tends to lower the temperature of the tank more rapidly than the temperature of the fuel. If the fuel level is low, the upper portion of the tank will cool more rapidly and form condensation. Siphon Break Valve A siphon break valve is installed on gensets if the exhaust injectionelbow is at or below loadwater line. When properly installed, it helps prevent sea water siphoning into the engine and compartment when the genset shuts down. The siphon break valve is normally trouble free. However, when used in contaminatedwaters or salt water for example, some corrosion may appear. The valve can be checked for free movement after unscrewing the top cover. If the valve sticks or the seat shows wear, the valve must be replaced (see Parts Manual). Condensation (water) can cause clogging of fuel filters as well as freezing problems. In addition, water mixing with the sulfur in the fuel forms acid which can corrode and damage engine parts. Priming the Fuel System FUEL SYSTEM The fuel system must be primed prior to initial start-up or after engine has run out of fuel. Use only a good quality fuel obtained from a reputable supplier. The quality of fuel used is important inobtaining dependable performance and satisfactory engine life. Fuels must be clean, completely distilled, well refined, and non-corrosiveto fuel system parts. LowPressure Fue/Sysfem:The low pressurefuel system consists of the fuel transfer pump, fuel filter and injection pump inlet. To prime these components, use the following procedure. Be sure there is fuel inthe tank, and the shut-off valve is open. 4-5 Redistribution or publication of this document, by any means, is strictly prohibited. 3. Tighten the fuel line at the injection pump inlet. INJECTION LINE CONNECTING NUT High Pressure Fuel System: The high pressure fuel system consists of the injectionpump,fuel injectionlines and fuel injectors. See Figure 4-4. This part of the system is self-priming since any trapped air is usually forced out through the injectionnozzles. However, if the engine has run out of fuel, been shut down for an extended period, or has had the injection lines removed, it may be necessary to prime. Use the following procedure. 1. Loosen the fuel injectionline connecting nut attaching each line to corresponding nozzle holder. See Figure 4-4. FUEL RETURN LINE 2. Energize the starting motor by holding the StartStop/Preheat switch in the Start position. INJECTION PUMP 3. After 30 seconds, release the switch and pause for two minutes to permit the starter motor to cool. 1- Excessive cranking periods can overheat anddamage the starter. Do not engage starter for periods longer than 30 seconds without allowing two minutes for staffer to cool. FUEL FILTER Fuel Filter INJECTION PUMP FUEL INLET FSl496 The combination primary and secondary fuel filter is a disposable type. Any dirt that passes through the primary section is trapped by the secondary section. This prevents dirt from entering the fuel injection pump. FIGURE 4-4. DIESEL FUEL SYSTEM (MDL4 SHOWN) 1. Loosen the filter-to-injection-pumpfuel line at the in- jection pump inlet fitting. See Figure 4-4. The filter replacement interval will vary according to the fuel quality and cleanliness. Usingthe wrong fuel, or dirty fuel, will shorten service life of the filter. 2. Actuate the transfer pump priming lever until fuel flows from the fitting. See Figure 4-5. Note: Ifthe pump pushrod is on the high part of the camshaft lobe, crank the engine over one revolutionto permit hand operation. lCAUTloN(Dirt or waterin the system will cause severe damage to both the injection pump and the injection nozzles. It Is extremely Important the fuel be kept clean and free of water. . TRANSFER PUMP Refer to the Periodic Maintenance Schedule for the recommended filter change interval. However, if the engine shows signs of fuel starvation (reduced power or surging), change the fuel filter. Use the following procedures to replace. 1. Close the fuel tank shutoff valve. PRIMING LEVER 2. Clean all dirt from around the filter, filter base and surrounding area. 3. Remove the filter retaining clips. See Figure 4-6. m147 FIGURE 4.5. FUEL TRANSFER PUMP 4-6 Redistribution or publication of this document, by any means, is strictly prohibited. tering the cells. After cleaning, flush the outside of the battery and the surrounding areas with clean water. Keep the battery terminals clean and tight. After making connections, coat the terminals with a light application of non-conductivegrease or petroleumjelly to retardcorrosion. FSl245 RETAININGCUPS FIGURE 4 -6. FUEL FILTER ASSEMBLY 4. Remove the old filter and dispose of properly. 5. Install new filter element and prime the fuel system. VALVECLEARANCE Correct valve clearance is very important in diesel engine performance because of the high compression developed in the cylinders. Incorrect valve clearance will cause loss of compression, misfiring, noise and may eventually leadto damaged enginecomponents. Always perform valve clearance adjustments on a cold engine, with the piston near top dead center on its compression stroke and intake and exhaust valves closed. For detailed valve clearance adjustment procedures, refer to the Engineservice Manual (934-0750) or call the authorized Onan Engine Service Center. I ES-1675 BATTERY FIGURE 4-7. CLEANING BATTERY Check the condition of the starting battery at the interval specified in Table 4-1, Always disconnect the negative (-) cable from the battery before working on any part of the genset electrical system. Disregard the sections on Checking Specific Gravity and Checking Electrolyte Level when using a maintenance-free type battery. Checking Specific Gravity Use a battery hydrometer to check the specific gravity of the electrolyte in each battery cell. JhWARNINGI Sattery electrolfle can cause severe eye damage and burns to the skin. Wear goggles, rubber gloves and a protective apron when working with batterfes. (QWARNINGI lgnltlon of explosive battery gases can cause severe personal injury. Do not smoke, wear goggles and protective-rubber gloves and apron when serviclng bafterles. Holdthe hydrometer vertical and take the reading. Correct the reading by adding four gravity points (0.004) for every five degrees the electrolyte temperature is above 80"F ( 2 PC),or subtracting four gravity points for every five degrees below 80' F (27"C). Afully charged battery will have a corrected specific gravity of 1.260. Charge the battery if the reading is below 1.21 5. Cleaning the Battery Keep the battery clean by wiping it with a damp cloth whenever it appears dirty. Remove the battery cables (negative (-) cablefirst) if corrosionis presentaroundthe terminal connections. Wash the terminals with an ammonia solution, or a solution consisting of 114 pound (about 100 grams) of bakingsoda in 1 quart (about 1 liter) of water. See Figure 4-7. Checking Electrolyte Level Check the level of the electrolyte (acid and water solution) in the battery at least every 50 hours of operation. Fillthe battery cells to the bottomof the filler neck. If cells are low on water, add distilledwater and recharge. If one cell is low, check case for leads or for a bad cell. Removethe batteryfrom vessel for cleaning. Be sure the vent plugs are tight to prevent cleaning solution from en- 4-7 Redistribution or publication of this document, by any means, is strictly prohibited. GmWator Bearing Do not add waterln freezlngweather unwlll run long enough (two to three hours)toprovide thoroughmixlngOf water andele& leSS Keepthe batterycase clean and dry. An accumulationof moisturewill lead to battery discharge and failure. Inspect the bearing for evidence of outer case rotation every 1000 hours of use. The bearing should be replaced every five years. Deterioration of the bearing grease due to oxidation makes this replacement necessary. If the generator requires major repair or service, contact an authorized Onan dealer or distributor. ACGENERATOR OUT-OF-SERVICE PROTECTION There are no brushes, brushsprings Or collector rings On the generator, therefore it requires very little maintenance. Periodic inSpeCtiOnS, to coincide with engine Oil changes, will help provide good performance. The inherent lubricating qualities of No. 2 diesel fuel should protectthe cylinders of a diesel engine for at least 30 days when not in service. io protect an engine that will be out of sewice for more than 30 days, proceed as follows: trolyte. 1. Exercise the genset, as described in the Operation section, until the engine is at operating temperature. 1- Accidental starting of the generator set can cause severe personal Injury or death. Move the Operation Selector switch to STOP and dlsconnect the startlng baffery(negative1-1 lead flrst)beforeInspecting the rotating rectifierassem6ly. 2. Shut down the genset and disconnect the battery cables (negative [-] cable first). Store the battery in a cool, dry place and connect to atrickle charger once every 30 days to maintain full charge. Removethe generator end bell cover and inspect the rotating rectifier assembly to make sure the diodes are free of dust, dirt and grease (see Figure 4-8). Excessiveforeign matter on these diodes and heat sinks will cause diode overheating and failure. Blow out the assembly periodically with filtered, low-pressure air. 1- Baffery electrolyfe can cause severe eye damage and burns to the skin. Wear goggles, rubbef gloves and a protectlve apron when working wlth batteries. 3. Drain the crankcase oil while still warm. Replace oil filter. Refill crankcase and attach a tag indicating viscosity of the oil used. 1- Excessive foreignmatter on diodes and heat slnks will cause overheating and possible fallure. 4. Check the coolant level and add more coolant if low. If freezing temperatures are possible, test strength of the coolant mixture. The sea water cooling system must be drained of water, or protected with a 50-50 anti-freeze mixture as follows: ROTATING RECTIFIER ASSEMBLY A. Close sea cock and remove the sea water inlet hose at filter. B. Place hose end in a bucket of anti-freeze mixture and run engine until mixture is observed coming out of the exhaust outlet. C. Replace inlet hose and tighten clamp. 5. Plug exhaust outlets to prevent entrance of moisture, bugs, dirt, etc. 6. Clean and wipe the entire genset. Coat parts susceptible to rust with a light coating of grease or oil. v Returning the Genset to Service Refer to the preceding paragraphs in this Maintenance section for specific service procedures. ESI 223 1. Remove plug from the exhaust outlet, and open the seacock. FIGURE4-8. GENERATOR END VIEW 4-8 Redistribution or publication of this document, by any means, is strictly prohibited. 2. Shut down the genset and disconnect the battery (negative [-I lead first). Store the battery in a cool, dry placeand connectto a tricklecharger once every 30 days to maintain full charge. Check the tag on the oil base and verify that the oil viscosity is still correct for existing ambient temperature. 3. Clean and check the battery. Measure the electrolyte specific gravity with a hydrometer (1.260 @ 80" F [27" C]) and verify proper level. If the specific gravity is low, chargethe battery untilcorrect value is obtained. If level is low, add distilled water and charge until the specific gravity reading is correct. 1- Battery e/ectrolyte can cause sewere eye damage and bums to the skin. Wear gogg/es, rubber gloves and a protective apron when worklng with batteries. 4. Prime the fuel system. 5. Connect the starting battery, the negative (-) cable last. 6. Remove all loads before starting the genset. 7. After starting, apply load of at least 50 percent rated capacity. 8. Check all gauges for normal readings. Genset is ready for operation. 49 Redistribution or publication of this document, by any means, is strictly prohibited. Notes Redistribution or publication of this document, by any means, is strictly prohibited. Redistribution or publication of this document, by any means, is strictly prohibited. California Proposition 65 Warning Diesel engine exhaust and some of its constituents are known to the State of California to cause cancer, birth defects, and other reproductive harm. Redistribution or publication of this document, by any means, is strictly prohibited.
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