Specifications
| Fuel | Diesel (ASTM No. 2) |
|---|---|
| Frequency | 50.0 Hz |
| Standby power | 500 kW |
| Standby kVA | 625 |
| Oil capacity | 151.4 L |
| Voltage options | 220/380 V |
| Phase | 3 |
| Power factor | 0.8 |
| Battery group | 8D |
| Battery cranking | 1620 CCA |
| Battery voltage | 24 V |
| Battery quantity | 4 |
| Coolant capacity | 207.9 L |
Engine
| Oil capacity | 151.4 L |
|---|---|
| Coolant capacity | 207.9 L |
| Displacement | 37.7 L |
| Rated speed | 1800 rpm |
Maintenance & consumables
for the Cummins/Onan KT2300-G| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Paper type | 140-1371 | PartsGeek | ||
| Fuel filter | Replaceable element | — | find | ||
| Oil filter | Replaceable element in housing | — | 500 hr | find | |
| Coolant | 207.9 l | — | 2000 hr | ||
| Oil | ASTM D2890 and MIL-L-2104-C | 151.4 l | — | 500 hr |
Common questions
What is the power rating of the Cummins/Onan 500 DFX-57R?
The Cummins/Onan 500 DFX-57R is rated 500 kW standby (625.0 kVA).
What engine does the Cummins/Onan 500 DFX-57R use?
The Cummins/Onan 500 DFX-57R is powered by the Cummins/Onan KT2300-G engine.
What fuel does the Cummins/Onan 500 DFX-57R use?
The Cummins/Onan 500 DFX-57R runs on Diesel (ASTM No. 2).
What is the oil capacity of the Cummins/Onan 500 DFX-57R?
The Cummins/Onan KT2300-G engine in the Cummins/Onan 500 DFX-57R has an oil capacity of 151.4 liters.
Troubleshooting
8Symptoms & remedies
| Symptom | Remedy |
|---|---|
| Fault lamp lights and engine stops cranking after approximately 75-seconds. | See engine service manual for troubleshooting fuel system. After correcting fault, reset engine monitor relay by placing Run-Stop/Reset-Remote switch to Stop/Reset position, depressing Reset button, then to the required running position. |
| Engine runs, shuts down, cranks for 75-seconds, cranking cycle stops, light ON. | Check fuel supply. |
| "Low oil pressure shutdown." | Check— 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." | Check— a. Coolant level. Replenish is necessary. b. City water cooled sets. Check water flow, valves, etc. c. Check sensor; check thermostat. |
| Dizziness | Get out into fresh air immediately. |
| Weakness and Sleepiness | Get out into fresh air immediately. |
| Vomiting | Get out into fresh air immediately. |
| Muscular Twitching | Get out into fresh air immediately. |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.
Parts
16| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 130-1032 | Tube, Coolant - Right Side | 1 | Hose | PartsGeek |
| 130-1033 | Tube, Coolant - Left Side | 1 | Hose | PartsGeek |
| 130-1043 | Tube, Coolant - Lower | 1 | Hose | PartsGeek |
| 140-1370 | Air Cleaner (Includes Replacement Filter) | 2 | Air filter | PartsGeek |
| 140-1371 | Filter, Air - Paper (Replacement) | 2 | Air filter | PartsGeek |
| 191-0688 | Alternator - Includes Regulator (Motorola #70D44039B04) | 1 | Alternator | PartsGeek |
| 193-0108 | Sender, Oil Pressure | 1 | Sensor | PartsGeek |
| 193-0109 | Sender, Temperature - Engine Coolant | 1 | Sensor | PartsGeek |
| 309-0169 | 1 Begin Spec G 25 26 | 1 | Sensor | PartsGeek |
| 309-0178 | Sender, Water Temperature | 2 | Sensor | PartsGeek |
| 309-0179 | Switch, Thermostatic - High Coolant Temperature Shutdown | 2 | Sensor | PartsGeek |
| 309-0269 | Air Cleaner (Includes Element) - Standard | 1 | Sensor | PartsGeek ironwing $32.86 |
| 309-0272 | Air Cleaner - Heavy Duty (10" Inlet Tube) | 1 | Sensor | PartsGeek |
| 511-0059 | Belt, Drive | 1 | Belt | PartsGeek |
| 100-1383 | Replacement Engine (Cummins Model KT2300G) | 1 | Service part / kit | PartsGeek |
| 130-1044 | Radiator, Engine Coolant | 1 | 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 |
|---|---|---|---|
| Standby | 100% | 174.0 | 46.0 |
Available documents
Operator's manual — 960-0317 Onan DFX Operator's and Parts Manual (5-1976) (Cummins/Onan)