Specifications
| Fuel | gasoline |
|---|---|
| Frequency | 60.0 Hz |
| Standby power | 350 kW |
| Prime power | 350 kW |
| Oil capacity | 2.4 L |
| Voltage options | 120/208 V, 127/220 V, 139/240 V, 240/416 V, 254/440 V, 277/480 V, 120/240 V, 240/480 V |
| Phase | single phase |
| Power factor | 0.8 |
| Battery cranking | 500 CCA |
| Battery voltage | 12 V |
| Battery quantity | 1 |
| Coolant capacity | 2.8 L |
| Dry weight | 175 kg |
Maintenance & consumables
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | — | 1000 hr | find | ||
| Fuel filter | — | 200 hr | find | ||
| Oil filter | — | 100 hr | find | ||
| Belt | — | 100 hr | find | ||
| Coolant | — | 200 hr | |||
| Coolant filter | — | 365 hr | find | ||
| Hydraulic filter | — | find | |||
| Oil | — | 100 hr |
Common questions
What is the power rating of the Cummins/Onan Y?
The Cummins/Onan Y is rated 350 kW standby.
What fuel does the Cummins/Onan Y use?
The Cummins/Onan Y runs on gasoline.
Troubleshooting
18Symptoms & remedies
| Symptom | Cause | Remedy |
|---|---|---|
| NO AC OUTPUT VOLTAGE AT RATED RPM | Is control panel field breaker CB21 on? No - Replace defective and check continuity with ohmmeter. Is breaker open? Yes - Push to reset breaker. Does generator AC output voltage build up? If voltage is unstable, high or low, or causes breaker to trip, see Flow Charts B, C, D or E. | |
| NO AC OUTPUT VOLTAGE AT RATED ENGINE RPM | Replace defective field breaker. Remove one lead from breaker and check continuity with ohmmeter. Is breaker open? Is control panel field breaker CB21 ON? If voltage is unstable, high or low, or causes breaker to trip, see Flow Charts B, C, or D. Push to reset breaker. Does generator AC output voltage build up? Flash exciter field per TEST [E]. Does generator output voltage build up? | |
| Engine does not crank. | Check battery per Checkout [A] and recharge or replace. Check battery charger operation. | |
| The DC control has a number of sensors that continuously monitor the engine for abnormal conditions such as low oil pressure, high coolant temperature and high exhaust temperature. | If any one of these conditions occur, the Fault reset breaker trips and stops the unit. The following sections describe operation of the fault systems and suggested items the operator can check. | |
| The control panel Fault reset breaker will trip for any one of the fault conditions described separately below. | Locate the problem and make the necessary corrections before resetting breaker and starting the generator set. The high exhaust temperature and low oil pressure faults are delayed 5 seconds to avoid nuisance tripping. | |
| Low Oil Pressure | Remove dipstick and check oil level. If low, add oil to bring level up to the Max mark. Inspect engine exterior for leaks and repair as necessary. | The oil pressure switch actuates the fault circuit if pressure drops below 9 psi (62 kPa). |
| High Coolant Temperature | Observe coolant temperature gauge for indication of temperature over 221 OF (105OC). The coolant thermostat switch closes at this temperature and actuates the fault circuit. Check coolant level in the recovery tank after allowing engine to cool down. | Ensure pump belt is OK and has proper tension; ensure sea water flow at exhaust outlet is about 3 gal/min (11 litre/min). Also check cooling system cleanliness (freedom from contaminants, rust, sludge build-up, etc.). |
| High Exhaust Temperature | The high exhaust temperature switch is mounted on the exhaust manifold and closes on temperature rise. It opens automatically when the generator set cools down. | High exhaust manifold temperature is caused by failure of the sea water cooling system. Sea water flow at the exhaust outlet should be about 3 gal/min (11 litre/min). Failure can be caused by a defective sea water pump, heat exchanger, drive belt, inlet filter or a closed sea water valve. Whenever a shutdown occurs, a thorough inspection of the complete exhaust system must be made by an experienced serviceperson. |
| Engine fails to crank. | Switch in 'Run' position. | |
| Is control panel field and check continuity with ohmmeter, is breaker open? | No | Push to reset breaker. Does generator AC output voltage build up? |
| Flash exciter field per TEST [D]. Does generator output voltage build up? | No | |
| Is residual voltage across TB21-62 and 63 5 to 10 VAC or more per TEST [A]? | No | Disconnect stator leads 7 and 8 from TB21-62 and 63. Is residual voltage across leads 5 to 10 VAC or more now? |
| Check reactor L21 and transformer T21 per TESTS [B] and [E]. | No | |
| Is exciter field voltage across VR2l-5 8 6 5 to 10 VDC or more? | No | Check diodes and SCRs on bridge assembly CR21 per TEST [MI. Check exciter field wiring for opens per TEST [HI. Replace bad wiring. |
| Check fuses F2 and F3 for continuity on VR21 regulator PC board. | No | |
| Check exciter field winding per TEST [HI. Replace if bad. | No | |
| Check exciter field wiring for shorts per TEST [MI. Replace bad wiring. | No | |
| Replace voltage regulator PC board per procedure [F]. Do not replace the printed circuit board until external trouble has been corrected to avoid damage to new PC board. | No |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.
Parts
70| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 420-0336 | Engine Control Tester | Engine control tester | PartsGeek | |
| 612-6678 | YD PTO AC Generator Wiring Diagram | Wiring diagram | PartsGeek | |
| 615-0426 | 12/15 KW Generator Meter/Breaker Panel Schematic Diagram | Schematic | PartsGeek | |
| 615-0427 | 16/20, 20/24 KW Generator Meter/Breaker Panel Schematic Diagram | Schematic | PartsGeek | |
| 615-0428 | 24/30, 30/35 KW Generator Meter/Breaker Panel Schematic Diagram | Schematic | PartsGeek | |
| A16-IC2 | Overspeed Sensor Module | Module | PartsGeek | |
| A17-IC2 | Start Disconnect Module | Module | PartsGeek | |
| CB21 | Exciter Circuit Breaker | Circuit breaker | PartsGeek | |
| CR21 | Rectifier Bridge Assembly | Rectifier bridge | PartsGeek | |
| CS-1313-2 | Drive belt adjustments diagram | Belt | PartsGeek | |
| ES-1405-2 | VOLTAGE REGULATOR TRANSFORMER | Voltage regulator transformer | PartsGeek | |
| ES-1674-1 | BATTERY CONNECTIONS | Battery connections | PartsGeek | |
| FS-1603-1 | FUEL SHUT-OFF VALVE | Fuel shutoff valve | PartsGeek | |
| GSR-16466000 | Fuel Filter | 1 | Fuel filter | PartsGeek |
| GSR-16466002 | Oil Filter | 1 | Oil filter | PartsGeek |
| GSR-16466003 | Air Filter | 1 | Air filter | PartsGeek |
| GSR-16466004 | Coolant | 1 | Coolant | PartsGeek |
| GSR-16466005 | Battery | 2 | Battery | PartsGeek |
| M-1678.2 | Oil fill fitting | 1 | Oil filter | PartsGeek |
| M-1679 | RECOVERY TANK (SEE INSTALLATION INSTRUCTIONS FURNISHED WITH TANK) | Recovery tank | PartsGeek | |
| VR21 | Voltage Regulator PC Board | Voltage regulator | PartsGeek | |
| XCS-1311-1 | HEAT EXCHANGER COOLING LEGEND by Separate Pump Circulated by Engine | Heat exchanger | PartsGeek | |
| 1.10 | Armature and Blade Assembly - Includes Lead Wire and Contact Point | 1 | Service part / kit | PartsGeek industrialinjection $1219.41 |
| 1320A | Hood, Lylinder and Control, Assembly - Includes Hood and Hinge Pin | 1 | Service part / kit | PartsGeek |
| 13A18A | Push Button, Plant Start, Assembly - Includes Button and Lead Wire | 1 | Service part / kit | PartsGeek |
| 1400M | Panel, Control, Assembly - Includes Panel, Relays, Choke, Clips, Etc. | 1 | Service part / kit | PartsGeek |
| 1412A | Rheostat - Model 'J' 2 OHM Includes Knob | 1 | Service part / kit | PartsGeek |
| 1412C | Ammeter, Charge - 10-O-LO | 1 | Service part / kit | PartsGeek |
| 1412E | Resistor, Current Limiting - 5 Turns | 1 | Service part / kit | PartsGeek |
| 1412H | Porcelain, Resistance Unit | 1 | Service part / kit | PartsGeek |
| 1419A | Push Button, Plant Stop, Assembly - Includes Button and Lead Wire - Electric Start Model | 1 | Service part / kit | PartsGeek |
| 1419B | Push Button, Plant Stop - Manual Start. Model | 1 | Service part / kit | PartsGeek |
| 1A51 | Condenser - 1.0 MFD | 1 | Service part / kit | PartsGeek |
| 75197 | Coil, Choke, Assembly ~ Includes Coil, Coil Form, and Leads | 1 | Service part / kit | PartsGeek |
| 75198 | Bracket, Choke Coil | 1 | Service part / kit | PartsGeek |
| 81470 | Resistor - 1.5 OHMS- 4" Adjustable | 1 | Service part / kit | PartsGeek |
| 86928 | Condenser - 0.1 MFD | 1 | Service part / kit | PartsGeek |
| 8L471 | Bracket, Resistor | 1 | Service part / kit | PartsGeek |
| 900-0181 | Regulator Controls | Service part / kit | PartsGeek | |
| 900-1002 | Supplement to the YD Service Manual | Service part / kit | PartsGeek | |
| 929-0002 | Service part / kit | PartsGeek | ||
| 929-0004 | Service part / kit | PartsGeek | ||
| 934-0501 | Generator and Control | 8 | Service part / kit | PartsGeek |
| 946-0120 | Service part / kit | PartsGeek | ||
| 961-0120 | Service part / kit | PartsGeek | ||
| 961-0122 | Service part / kit | PartsGeek | ||
| 967-0120 | Service part / kit | PartsGeek | ||
| 967-0121 | Service part / kit | PartsGeek | ||
| 967-0122 | Service part / kit | PartsGeek | ||
| 967-0123 | Service part / kit | PartsGeek | ||
| 967-0125 | Service part / kit | PartsGeek | ||
| 967-0220 | Generator set control panel | Service part / kit | PartsGeek | |
| 967-0223 | Generator set control panel | Service part / kit | PartsGeek | |
| 968-0120 | Service part / kit | PartsGeek | ||
| 968-0121 | Service part / kit | PartsGeek | ||
| 968-0122 | Service part / kit | PartsGeek | ||
| 968-0340 | Generator set control panel | Service part / kit | PartsGeek | |
| 974-0120 | Service part / kit | PartsGeek | ||
| 974-0121 | Service part / kit | PartsGeek | ||
| 974-0122 | Service part / kit | PartsGeek | ||
| 974-0220 | Generator set control panel | Service part / kit | PartsGeek | |
| ES-1405-1 | CONTROL BOX FRONT PANEL | Service part / kit | PartsGeek | |
| ES-1658-1 | field flashing circuit components (12-volt storage battery, 10-amp fuse, momentary-on switch, diode) | Service part / kit | PartsGeek | |
| ES1495 | exciter rotor lock nut | Service part / kit | PartsGeek | |
| GSR-16466006 | Exhaust Muffler | 1 | Service part / kit | PartsGeek |
| LS-1172-1 | Oil viscosity vs temperature chart | Service part / kit | PartsGeek | |
| M-1680-6 | Cooling system components diagram | Service part / kit | PartsGeek | |
| M-1682-2 | Fault reset breaker | Service part / kit | PartsGeek | |
| TB21-1 | Reference Transformer T21, Lead 1 | Service part / kit | PartsGeek | |
| TB21-2 | Reference Transformer T21, Lead 2 | Service part / kit | PartsGeek |
Service, wear & replacement parts referenced for this model and its engine — confirm the exact part for your serial number. See the full parts catalog to search and cross-reference.
Fuel consumption
| Rating | Load | L/h | gal/h |
|---|---|---|---|
| Prime | |||
| Standby |
Available documents
Spec sheet — 929-0601B Onan YD PTO Protec Series Generator Installation manual 05-2002 (Cummins/Onan)Operator's manual — 929-0101 Onan YD PTO Protec series Operator's Manual (09-2001) (Cummins/Onan)Service manual — 900-0181 Onan YB 200-350 KW Generators Controls Service Manual 11-1981 (Cummins/Onan)Service manual — 900-0184 Onan YD Generator Controls Service Manual 11-1983 (Cummins/Onan)Service manual — 901-0000 Onan 1B (spec A-C) Operation & Service manual (02-1946) (Cummins/Onan)Service manual — YD PTO Service Manual (Cummins/Onan)