Specifications
| Frequency | 50.0 Hz |
|---|---|
| Standby power | 635 kW |
| Standby kVA | 793 |
| Prime power | 635 kW |
| Controller | PowerCommand |
| Oil capacity | 140.0 L |
| Voltage options | 120/240 V, 120/208 V, 127/220 V, 139/240 V, 220/380 V, 240/416 V, 254/440 V, 277/480 V, 347/600 V |
| Phase | A (U), B (V), C (W) |
| Dimensions (L×W×H) | 187×92×107 mm |
Engine
| Oil capacity | 140.0 L |
|---|---|
| Coolant capacity | 118.0 L |
| Displacement | 37.7 L |
| Aspiration | Turbocharged, Aftercooled (TA) |
| Rated speed | 1800 rpm |
Maintenance & consumables
for the Cummins/Onan GTA38| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Dry Processed Natural Gas | — | 250 hr | ||
| Fuel filter | Standard Carburetor - IMPCO Make Low Pressure Dry Processed Natural Gas | — | 250 hr | ||
| Oil filter | Four spin-on canisters-combination full flow with bypass | — | 250 hr | ||
| Battery | 8D | — | |||
| Belt | Standard Cooling System | — | 10 hr | ||
| Coolant | — | ||||
| Coolant filter | Standard Cooling System | — | 250 hr | ||
| Oil | 4.0 gal | — | 250 hr | ||
| Spark plug | Standard Cooling System | — | 6000 hr |
Common questions
What size generator is the Cummins/Onan C635N6?
The Cummins/Onan C635N6 is rated 635 kW standby (793.0 kVA).
Which engine powers the Cummins/Onan C635N6?
The Cummins/Onan C635N6 is powered by the Cummins/Onan GTA38 engine.
What's the oil capacity on a Cummins/Onan C635N6?
The Cummins/Onan GTA38 engine in the Cummins/Onan C635N6 has an oil capacity of 140.0 liters.
Parts
55| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 3305373 | Cummins Part No. DCA4 Units | 1 | Coolant filter | Amazon eBay |
| 3315459 | Cummins Part No. DCA4 Units | 1 | Coolant filter | Amazon eBay |
| 3317428 | Cummins Part No. DCA4 Units | 1 | Coolant filter | Amazon eBay |
| 3318320 | DCA95 | 1 | Coolant filter | Amazon eBay |
| 3375049 | Oil Filter Wrench | 1 | Oil filter | Amazon eBay |
| 3375055 | Pressure Regulator Removal Tool | 1 | Tool | Amazon eBay |
| 3375182 | Valve Spring Tester | 1 | Tool | Amazon eBay |
| 3375301 | Tube Cutter | 1 | Tool | Amazon eBay |
| 3375411 | Thermostat Seal Mandrel | 1 | Thermostat | Amazon eBay |
| 3376579 | Open spin-on full flow filter for inspection | 1 | Tool | Amazon eBay |
| 3376898 | Engine Water Pump | 1 | Pump | Amazon eBay |
| 3822524 | Use on v-belts ( 3/8 to 7/8) and v-ribbed belts with 5 ribs or less. | 1 | Belt | Amazon eBay |
| 3822525 | Use on v-beits larger than 7/8 in. and v-ribbed belts with 6 or more ribs. | 1 | Belt | Amazon eBay |
| DCA95 | Coolant Filter | 1 | Coolant filter | Amazon eBay |
| 3096680 | Piston STC 13.8:1 Ratio | 1 | Service part / kit | Amazon $273.00 eBay FridayParts $1085.70 |
| 3096681 | Piston KT Series 15.5:1 Ratio | 1 | Service part / kit | Amazon $167.31 eBay FridayParts $209.79 |
| 3096682 | Piston KTA Series 14.5:1 Ratio | 1 | Service part / kit | Amazon $145.88 eBay FridayParts $214.73 |
| 3096683 | Piston 13.5:1 Ratio | 1 | Service part / kit | Amazon $843.00 eBay |
| 3096684 | Piston KTA 15.7:1 Ratio | 1 | Service part / kit | Amazon eBay $223.80 |
| 3096685 | Piston STC 13.9:1 Ratio | 1 | Service part / kit | Amazon $212.00 eBay FridayParts $192.55 |
| 3375432 | Crack Detection Kit | 1 | Service part / kit | Amazon eBay |
| 3375434 | crack detection developer | 1 | Service part / kit | Amazon eBay |
| 3376891 | Fluorescent Tracer | 1 | Service part / kit | Amazon eBay |
| 3377253 | Blacklight (AC) Inspect for oil leak | 1 | Service part / kit | Amazon eBay |
| 3377394 | Blacklight (DC) Inspect for oil leak | 1 | Service part / kit | Amazon eBay |
| 3377462 | Optical Tachometer | 1 | Service part / kit | Amazon eBay $497.15 |
| 3377464 | Reflective Tape | 1 | Service part / kit | Amazon eBay |
| 3628731 | Piston STC Kit | 1 | Service part / kit | Amazon $101.99 eBay |
| 3630913 | Piston KTA-50-G7 | 1 | Service part / kit | Amazon $605.99 eBay |
| 3631241 | Piston Kit STC 13.9:1 Ratio | 1 | Service part / kit | Amazon $107.00 eBay FridayParts $264.60 |
| 3631242 | Piston Kit 13.5:1 Ratio | 1 | Service part / kit | Amazon eBay |
| 3631243 | Piston Kit KTA 15.7:1 Ratio | 1 | Service part / kit | Amazon eBay |
| 3631244 | Piston Kit KTA Series 14.5:1 Ratio | 1 | Service part / kit | Amazon $299.99 eBay FridayParts $228.99 |
| 3631245 | Piston Kit KT Series 15.5:1 Ratio | 1 | Service part / kit | Amazon $224.00 eBay FridayParts $209.79 |
| 3631246 | Piston Kit STC 13.8:1 Ratio | 1 | Service part / kit | Amazon $217.17 eBay FridayParts $199.99 |
| 3803530 | Piston Assembly STC | 1 | Service part / kit | Amazon eBay FridayParts $25.89 |
| 3804747 | Piston Kit KTA-50-G7 | 1 | Service part / kit | Amazon eBay |
| 3804885 | Piston KTA-50-G8/G9 | 1 | Service part / kit | Amazon $282.73 eBay FridayParts $265.56 |
| 4089847 | Piston Kit GTA38/19 | 1 | Service part / kit | Amazon eBay |
| 4090013 | Piston Kit KTA-38-M2 | 1 | Service part / kit | Amazon $319.99 eBay |
| 4090029 | Piston Kit QSK19CE | 1 | Service part / kit | Amazon $748.73 eBay |
| 4090181 | Piston GTA38/19 | 1 | Service part / kit | Amazon eBay |
| 4097889 | Piston KTA-38-M2 | 1 | Service part / kit | Amazon eBay |
| 4910463 | Piston QSK19R/M | 1 | Service part / kit | Amazon $675.00 eBay |
| 4910465 | Piston QSK Series | 1 | Service part / kit | Amazon $1069.95 eBay FridayParts $1134.77 |
| 4916177 | Piston GTA/GQSK19 | 1 | Service part / kit | Amazon eBay |
| 4918058 | Piston QSK19CE | 1 | Service part / kit | Amazon $748.73 eBay |
| 4922319 | Piston QSK19C | 1 | Service part / kit | Amazon eBay |
| 4955233 | Piston Kit QSK19R/M | 1 | Service part / kit | Amazon $799.95 eBay |
| 4955235 | Piston Kit QSK Series | 1 | Service part / kit | Amazon eBay FridayParts $1134.77 |
| 4955236 | Piston Kit QSK19C | 1 | Service part / kit | Amazon $859.95 eBay |
| 4955238 | Piston Kit GTA/GQSK19 | 1 | Service part / kit | Amazon eBay |
| M-205091 | Valve Locks | 48 | Service part / kit | Amazon eBay |
| M-2881944 | Kit - Exhaust Valve | Service part / kit | Amazon eBay | |
| M-4955238 | Piston Kit | Service part / kit | Amazon eBay |
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
Spec sheet — A042J404 (Cummins/Onan)