Service parts for the GFBC
Grouped by system, with how many of each the parts manual calls for.
Fuel system
1 requiredPrices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.
Specifications
| Fuel | Natural Gas |
|---|---|
| Frequency | 60.0 Hz |
| Standby power | 250 kW |
| Standby kVA | 312 |
| Prime power | 225 kW |
| Emissions | EPA SI NSPS |
| Controller | PowerCommand, PowerCommand 3.3, PowerCommand digital electronic |
| Oil capacity | 34.0 L |
| Alternator | NPower (4-pole, Class H insulation) |
| Voltage options | 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 | 3 |
| Rated current | 376 A |
| Power factor | 0.8 |
| Battery group | 8D |
| Battery voltage | 24 V |
| Battery quantity | 2 |
| Coolant capacity | 74 L |
| Max ambient | 40 °C |
| Dimensions (L×W×H) | 3734×1778×2007 mm |
| Dry weight | 2995 kg |
Engine
| Oil capacity | 34.0 L |
|---|---|
| Coolant capacity | 136.0 L |
| Displacement | 14.0 L |
| Aspiration | Turbocharged and coolant-air aftercooled |
| Rated speed | 1800 rpm |
Maintenance & consumables
for the Cummins/Onan GTA855E| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | — | ||||
| Fuel filter | 149-0751 | Amazon eBay | |||
| Oil filter | — | ||||
| Battery | — | ||||
| Belt | — | ||||
| Coolant | 136.0 | — | |||
| Oil | 34.0 | — | |||
| Spark plug | — |
Service specifications
6| Type | Item | Value | Unit | Condition |
|---|---|---|---|---|
| Other | Compression Ratio | 8.5:1 | ||
| Other | Cranking Current | 900 | amps | at ambient temperature of 0 °C (32 °F) |
| Pressure | Running Pressure to Engine (Natural Gas) | 381 to 508 | mm WC | |
| Speed | Overspeed Limit | 2100 | rpm | |
| Speed | Rated Speed | 1800 | rpm | |
| Temperature | Maximum Gas Temperature - Dry Stack | 659 | °C | Full Load |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Recommended fluids
| Fluid | Grade | Standard | Ambient | Capacity | Notes |
|---|---|---|---|---|---|
| Fuel | Low Pressure Dry Processed Natural Gas | 905 BTU/ft.3 L.H.V. (33.72 kJ/L) | Running pressure to engine 381 to 508 mm WC (15 to 20 in. WC); minimum gas supply pipe size @ engine 50.8 mm (2.0 in.) |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Common questions
What size generator is the Cummins/Onan GFBC?
The Cummins/Onan GFBC is rated 250 kW standby (312.0 kVA).
Which engine powers the Cummins/Onan GFBC?
The Cummins/Onan GFBC is powered by the Cummins/Onan GTA855E engine.
What fuel does the Cummins/Onan GFBC use?
The Cummins/Onan GFBC runs on Natural Gas.
What's the oil capacity on a Cummins/Onan GFBC?
The Cummins/Onan GTA855E engine in the Cummins/Onan GFBC has an oil capacity of 34.0 liters.
What is the coolant capacity of the Cummins/Onan GFBC?
The Cummins/Onan GFBC cooling system holds 74 liters (19.5 US gallons) for the radiator system including the engine, per the manufacturer specification sheet.
What is the prime power rating of the Cummins/Onan GFBC?
The Cummins/Onan GFBC is rated 225 kW prime (281 kVA), against 250 kW standby.
How much does the Cummins/Onan GFBC weigh?
The Cummins/Onan GFBC has a dry weight of 2995 kg (6602 lb).
What voltages is the Cummins/Onan GFBC available in?
The Cummins/Onan GFBC is offered in 120/208 V, 127/220 V, 139/240 V, 220/380 V, 240/416 V, 254/440 V, 3-phase.
What size battery does the Cummins/Onan GFBC need?
The Cummins/Onan GFBC uses 2 batteryies, 24 V each, group 8D, per the manufacturer specification sheet.
Which alternator is fitted to the Cummins/Onan GFBC?
The Cummins/Onan GFBC uses a NPower alternator. It has 4 poles. Insulation class H.
What fuel filter does the Cummins/Onan GFBC use?
The Cummins/Onan GFBC uses fuel filter part number 149-0751.
Parts
8| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 0307-3047 | Relay (24V) | Relay 24v | Amazon eBay | |
| 0332-3923-02 | Terminal Block | 3 | Terminal block | Amazon eBay |
| 0332-3925-02 | Jumper-Terminal | Jumper terminal | Amazon eBay | |
| 0332-3943-02 | Jumper-Terminal | Jumper terminal | Amazon eBay | |
| 0332-4036-02 | Terminal Block (Earth) | Terminal block | Amazon eBay | |
| 0249-0814 | Relay 2P Base | 1 | Service part / kit | Amazon eBay |
| 0332-3926 | Terminal Block (End Stop) | 2 | Service part / kit | Amazon eBay |
| 0332-3927-02 | Terminal Block (End Plate) | 1 | 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.
Fuel consumption
| Rating | Load | L/h | gal/h |
|---|---|---|---|
| Standby | 25% | 950.0 | 250.96 |
Available documents
This page was generated from the 3 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.