Onan 20 Genset Manual
. MDKAD, MDKAE, MDKAF Printed in U.S.A. 03/03 981−0156.
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. Table of Contents SAFETY PRECAUTIONS. Safety Precautions Thoroughly read the OPERATOR’S MANUAL Used engine oil has been identified by some before operating the genset. Safe operation and state and federal agencies as causing cancer top performance can be obtained only by prop- or reproductive toxicity. Do not ingest, inhale, er operation and maintenance.
Results 1 - 13 of 13 - ONAN 20kW ES Generator and Controls Service Manual. Providing information such as the following Generator Operation. Maintaining the generator set. Study this manual care. For the name of your iocal Cummins/Onan or Onan. 20.0 kW (25.0 kVA at 0.8 PF).
Keep hands away from moving parts. Sponsible for operating the genset safely.
Contact Keep guards in place over fans, belts, pulleys, your authorized Onan/Cummins dealer or distribu- etc. Tor for more information.
POST THESE SUGGESTIONS IN POTENTIAL HAZARD AREAS OF THE VESSEL Redistribution or publication of this document, by any means, is strictly prohibited. Specifications MDKAD DIMENSIONS AND WEIGHT Without sound shield: Length. MDKAE DIMENSIONS AND WEIGHT Without sound shield: Length.41.9 inches (1064.3 mm) Width. MDKAF DIMENSIONS AND WEIGHT Without sound shield: Length.
48.5 inches (1232 mm) Width. Introduction ABOUT THIS MANUAL This manual covers operation and maintenance of the model MDKAD, MDKAE and MDKAF generator sets (gensets). Study this manual carefully and ob- serve all of its instructions and precautions.
Using the genset properly and maintaining it regularly will promote longer genset life, better performance, and safer operation. ENGINE OIL RECOMMENDATIONS Use premium quality motor oil.
Look for the API (American Petroleum Institute) classification and use Class CG-4, CF-4, CF or better oil. Also look for the SAE (Society of Automotive Engineers) viscos- ity grade. Referring to Figure 2, choose the viscos- ity grade appropriate for the range of ambient tem- peratures expected before the next scheduled oil change. CONTROL SEA WATER AIR INTAKE FUEL PANEL DIPSTICK INLET RESONATOR SOLENOID FILL FILTER OIL DRAIN BATTERY FUEL BATTERY VALVE FUEL PUMP HEAT FUEL NEGATIVE (−) RETURN POSITIVE (+) (MDKAF) INLET FILTER EXCHANGER COOLANT FILL AND REMOTE CONTROL PRESSURE CAP CONNECTOR HEAT WET EXHAUST EXCHANGER. GENSET-MOUNTED CONTROL PANEL installed.
Push the button to read M2 and M3 at the genset. “Check Engine” Fault Breaker (CB2): Shuts Figure 5 illustrates a typical control panel with op- down the genset when one of the following fault tional engine gauges.
Conditions causes it to trip: overvoltage, overspeed, Start-Stop-Prime/Preheat Switch (S1): Starts the low oil pressure, high exhaust temperature, high. REMOTE CONTROL PANELS installed, oil pressure and coolant temperature nor- mally display at the remote panel rather than at the Available remote control panels are shown in Fig- genset. A momentary gauge switch on the genset ure 6. The switch and gauges function the same panel (Figure 5) can be provided to read the gauges way as the ones on the genset-mounted control on the genset panel.
Operation EXHAUST GAS IS DEADLY! Engine exhaust contains carbon monoxide, a poisonous, odorless and colorless gas that can cause unconsciousness and death. Symptoms of carbon monoxide poisoning include: Dizziness Throbbing in Temples Nausea Muscular Twitching Headache Vomiting Weakness Trouble Thinking Clearly Sleepiness GET EVERYONE OUT INTO FRESH AIR IMMEDIATELY IF ANYONE EXPERIENCES ANY OF THESE SYMPTOMS. STOPPING TABLE 1. TYPICAL APPLIANCE LOADS Appliance Load (watt) Before stopping let the genset cool down by run- Air Conditioner 1400-2000 ning at no-load for three to five minutes.
Then touch the control switch momentarily to STOP. Battery Charger Up to 800 CAUTION Failure to let the engine cool down DC Converter.
RESETTING LINE CIRCUIT BREAKERS If a circuit breaker in the main power distribution panel in the vessel or on the genset (Figure 7) trips, CIRCUIT BREAKERS there is either a short circuit or too much load. Note (MAY BE ON OTHER END) that the genset will continue to run after a circuit breaker trips. GENSET EXERCISE dance with the manufacturer’s recommenda- tions. If use is infrequent, run the genset at approximately WARNING Hot coolant is under pressure 1/2 rated power for an hour every week.
Exercising and can cause severe burns when loosen- the genset results in better starting, longer engine ing the pressure cap. 1 - Check for oil, fuel, coolant and exhaust system leaks. 2 - See battery manufacturer’s recommendations. 3 - Check for slippage.
4 - Must be performed by an authorized Onan dealer. Redistribution or publication of this document, by any means, is strictly prohibited. Maintenance Procedures GENERAL INSPECTION Exhaust System Inspection Wet Exhaust System: Inspect the exhaust system Perform these checks and inspections every time for leaks and loose hose clamps at the exhaust the genset is started or every eight hours if the gen- manifold, exhaust elbow, muffler, water separator set is being run continuously. When the oil is completely mental regulations. OIL DIPSTICK OIL FILL OIL DRAIN VALVE OIL DRAIN HOSE (MDKAF) (MDKAD, MDKAE) OIL FILTER FIGURE 8. OIL CHECK, FILL, DRAIN AND FILTER Redistribution or publication of this document, by any means, is strictly prohibited.
ENGINE COOLING SYSTEM Changing Coolant WARNING Hot coolant is under pressure and See Table 2 for frequency of coolant, pressure cap, can cause severe burns when loosening the thermostat, hose, V-belt and zinc anode replace- pressure cap. Let the engine cool before loos- ment. COOLANT PRESSURE CAP COOLANT RECOVERY TANK (REFILL SYSTEM HERE) (REFILL NORMAL COOLANT LOSS HERE) DRAIN TUBE (ROUTE TO DRIP PAN) COOLANT HOSES EXHAUST HEAT EXCHANGER MDKAD, MDKAE HEAT EXCHANGER MDKAF COOLANT COOLANT COOLANT COOLANT COOLANT CLEANOUT COVERS COOLANT (BOTH ENDS). Adjusting V-Belt Tension The V-belt (Figure 10) drives the coolant pump and ADJUSTING BRACK- battery charging alternator. ET BOLT WARNING Accidental starting can cause se- vere personal injury or death. Disconnect the negative (-) cable(s) at the battery(ies) to pre- vent the engine from starting. Heat Exchanger and Zinc Anode valve design, check for free movement of the plung- er.
Onan 20 Genset
Replace the device if the plunger does not move The heat exchanger has cleanout covers on both freely or the body is encrusted with deposits from ends to clean the sea water tubes. Replacing the Sea Water Pump Impeller The sea water pump (Figure 13) is driven off a pow- er takeoff on the engine. To replace the flexible im- SEA WA- TER IN peller: 1.
Disconnect the negative (- ) cable(s) at the bat- tery(ies) to prevent the engine from starting. FUEL SYSTEM Drain more often if fuel quality is poor or condensa- tion cannot be avoided. To drain the filter, remove the plug (Figure 14), collect the water and sediment Fuel Handling Precautions (about 1/2 cup 120 ml) in a suitable container and Keep dirt, water and other contaminants from enter- dispose of properly. Priming the Fuel System Note: On Model MDKAD or MDKAE, if air entrainment in the fuel supply line continues to be a problem, it Priming the Low-Pressure Side: The fuel lift may be advisable to leave the bleed valve open to pump (Figure 14) runs during preheat when the bleed air continuously while running.
BATTERIES GENERATOR BEARING WARNING Sealed, maintenance-free batteries are recom- Accidental starting can cause se- mended. Follow the manufacturer’s instructions for vere personal injury or death. Disconnect the battery care. Keep the terminals clean and tight. Negative (-) cable(s) at the battery(ies) to pre- vent the engine from starting. Troubleshooting GENERAL el will trip, as indicated by an extended reset button. Push the reset button to reset.
Engine Gauges Fault Circuits Troubleshooting time can be saved if abnormal en- “Check Generator” Fault: If the “Check Genera- gine gauge readings were noted before shutdown; tor”. ENGINE DOES NOT CRANK FROM GENSET PANEL There are hazards present in troubleshooting that can cause equipment damage, se- WARNING vere personal injury or death. Troubleshooting must be performed by qualified persons who know about the hazards of fuel, electricity and machinery.
Read Safety Precautions and observe all instructions and precautions in this manual. ENGINE CRANKS BUT DOES NOT START(CONT.) There are hazards present in troubleshooting that can cause equipment damage, se- WARNING vere personal injury or death. Troubleshooting must be performed by qualified persons who know about the hazards of fuel, electricity and machinery. Read Safety Precautions and observe all instructions and precautions in this manual. “CHECK GENERATOR” FAULT SHUTDOWN There are hazards present in troubleshooting that can cause equipment damage, se- WARNING vere personal injury or death.
Troubleshooting must be performed by qualified persons who know about the hazards of fuel, electricity and machinery. Read Safety Precautions and observe all instructions and precautions in this manual. RECREATIONAL VEHICLES - EQUIPMENT, PARTS AND SERVICE. WARNING Improper service or replacement of 3. Call 1-800-888-ONAN for the name and tele- parts can result in severe personal injury, death, phone number of the nearest Cummins/Onan and/or equipment damage.
Service personnel. Use the following table to keep a record of all periodic and unscheduled maintenance and service. See Period- ic Maintenance. HOUR DATE METER MAINTENANCE OR SERVICE PERFORMED READING Record the name, address, and phone number of your authorized Onan service center.
Redistribution or publication of this document, by any means, is strictly prohibited. Cummins Power Generation 1400 73rd Avenue N.E. Minneapolis, MN 55432 763-574-5000 Fax: 763-528-7229 Cummins and Onan are registered trademarks of Cummins Inc. Redistribution or publication of this document, by any means, is strictly prohibited.