Specifications
| Fuel | Diesel |
|---|---|
| Frequency | 60.0 Hz |
| Standby power | 50 kW |
| Alternator | Cummins/Onan UR |
| Battery voltage | 12 V |
| Battery quantity | 2 |
Common questions
What is the power rating of the Cummins/Onan DEG?
The Cummins/Onan DEG is rated 50 kW standby.
What engine does the Cummins/Onan DEG use?
The Cummins/Onan DEG is powered by the Ford 2715E engine.
What fuel does the Cummins/Onan DEG use?
The Cummins/Onan DEG runs on Diesel.
What alternator does the Cummins/Onan DEG use?
The Cummins/Onan DEG uses a Cummins/Onan UR alternator.
Troubleshooting
13Symptoms & remedies
| Symptom | Remedy |
|---|---|
| Engine stops cranking and fault lamp lights, after cranking approximately 75 seconds. | See engine service manual for troubleshooting fuel system. |
| Fault lamp lights immediately after engine starts. | Check for: Overspeed condition as engine starts. |
| Fault lamp lights and engine shuts down after running for a period. | A. Oil level. Engine will shut down if sensor is closed. b. Check engine manual for troubleshooting oil system. c. High engine temperature. Check coolant level; check water flow (city water cooled systems); check radiator for free air flow, and fan belts for tightness. See engine manual for troubleshooting cooling system. d. Check for faulty oil pressure sensor or faulty high engine temperature sensor. |
| Engine runs, shuts down and cranks for 75-seconds. Cranking cycle stops; fault lamp lights. | Check fuel supply. |
| Fault lamp lights, no fault exists. | To check a no-fault condition, disconnect leads from TB11 terminals 29, 30 and 31. If fault lamp lights with leads disconnected, replace engine monitor board. Reconnect leads. |
| Overcrank fault lamp lights and engine stops cranking after approximately 75-seconds. | See engine service manual for troubleshooting fuel system. |
| Engine runs, shuts down, cranks for 75-seconds, cranking cycle stops, overcrank light ON. | Check fuel supply. |
| "Low oil pressure shutdown." | A. Oil level. Replenish if necessary. b. Sensor. Faulty sensor will shut down engine. c. Refer to engine service manual for troubleshooting guide for oil system. |
| "High engine temperature shutdown." | A. Coolant level. Replenish if necessary. b. City water cooled sets. Check water flow, valves, etc. c. Check sensor; check thermostat. d. Radiator model, check fan belts, radiator for obstructions, etc. |
| "Overspeed shutdown." | Check governor and throttle linkages for freedom of movement. Check overspeed switch. |
| "Overspeed light on, no shutdown." | Disconnect wire at TB11-29. Light on after reset; replace engine monitor board. |
| "Low oil pressure light ON." No shutdown. | Disconnect wire at TB11-30. Light ON after relay reset. Replace engine monitor board. |
| "High engine temperature light ON." No shutdown. | Disconnect wire at TB11-31. Light ON after relay reset. Replace engine monitor board. |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.
Parts
1| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 977-0121 | NA | NA | 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.
Available documents
Operator's manual — 977-0121 Onan DEG Operator's Manual (11-1978) (Cummins/Onan)Parts manual — 0932-0112 Onan Post-Sale Literature Index (07-1998) (Cummins/Onan)