Specifications
| Fuel | Natural Gas/Propane |
|---|---|
| Frequency | 50.0 Hz |
| Standby power | 680 kW |
| Standby kVA | 850 |
| Prime power | 560 kW |
| Emissions | EPA SI NSPS Compliant |
| Controller | PowerCommand |
| Oil capacity | 272.0 L |
| Alternator | NPower (4-pole, Class H insulation) |
| Voltage options | 120/240 V, 127/220 V, 139/240 V, 220/380 V, 240/416 V, 254/440 V, 277/480 V, 347/600 V |
| Phase | 3 |
| Rated current | 37 A |
| Power factor | 0.8 |
| Circuit breaker | 37 A |
| Battery group | 8D |
| Battery cranking | 1800 CCA |
| Battery voltage | 24 V |
| Battery quantity | 1 |
| Coolant capacity | 454 L |
| Max ambient | 40 °C |
| Dimensions (L×W×H) | 4737×2299×2819 mm |
| Dry weight | 8458 kg |
| Sound level | 72.0 dBA @ 7 m |
| Fuel tank | 0.0 L |
| Tank runtime | 0 hr |
Maintenance & consumables
for the Cummins/Onan GTA38 G3| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | — | 250 hr | |||
| Fuel filter | — | 250 hr | |||
| Oil filter | — | 250 hr | |||
| Battery | 24 Volt | — | |||
| Belt | — | 10 hr | |||
| Coolant | — | ||||
| Coolant filter | — | 250 hr | |||
| Oil | 4.0 gal | — | 250 hr | ||
| Spark plug | — | 6000 hr |
Common questions
What size generator is the Cummins/Onan GFJC?
The Cummins/Onan GFJC is rated 680 kW standby (850.0 kVA).
Which engine powers the Cummins/Onan GFJC?
The Cummins/Onan GFJC is powered by the Cummins/Onan GTA38 G3 engine.
What kind of fuel does the Cummins/Onan GFJC run on?
The Cummins/Onan GFJC runs on Natural Gas/Propane.
Which alternator is fitted to the Cummins/Onan GFJC?
The Cummins/Onan GFJC uses a NPower alternator. It has 4 poles. Insulation class H.
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 — GTA38G3GFJC (Cummins/Onan)Reference — Cummins-690-GFJC GTA38 (Cummins/Onan)