Specifications
| Fuel | diesel |
|---|---|
| Frequency | 60.0 Hz |
| Standby power | 300 kW |
| Standby kVA | 375 |
| Prime power | 270 kW |
| Emissions | Tier III |
| Controller | PowerCommand |
| Oil capacity | 36.72 L |
| Alternator | Stamford/AvK HCI434E |
| Voltage options | 208/120 V, 240/120 V, 480/277 V, 600/347 V |
| Phase | 3-phase |
| Power factor | 0.8 |
| Circuit breaker | 1200 A |
| Battery group | GR31 |
| Battery cranking | 1000 CCA |
| Battery voltage | 24V V |
| Max ambient | 50 °C |
| Dimensions (L×W×H) | 4191×1575×2439 mm |
| Dry weight | 4780 kg |
| Sound level | 72.0 dBA @ 7 m |
| Fuel tank | 1514.0 L |
| Tank runtime | 26 hr |
Engine
| Oil capacity | 36.72 L |
|---|---|
| Coolant capacity | 9.5 L |
| Displacement | 10.8 L |
| Aspiration | turbocharged and after-cooled |
| Rated speed | 1800 rpm |
Maintenance & consumables
for the Cummins/Onan QSM11-G4| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | — | 1000 hr | find | ||
| Fuel filter | — | 500 hr | find | ||
| Oil filter | — | 2000 hr | find | ||
| Belt | — | 2000 hr | find | ||
| Coolant | — | 50 hr | |||
| Coolant filter | — | find | |||
| Oil | — | 12000 hr |
Common questions
What is the power rating of the Cummins/Onan C300D6?
The Cummins/Onan C300D6 is rated 300 kW standby (375.0 kVA).
What engine does the Cummins/Onan C300D6 use?
The Cummins/Onan C300D6 is powered by the Cummins/Onan QSM11-G4 engine.
What fuel does the Cummins/Onan C300D6 use?
The Cummins/Onan C300D6 runs on diesel.
What is the oil capacity of the Cummins/Onan C300D6?
The Cummins/Onan QSM11-G4 engine in the Cummins/Onan C300D6 has an oil capacity of 36.72 liters.
What alternator does the Cummins/Onan C300D6 use?
The Cummins/Onan C300D6 uses a Stamford/AvK HCI434E alternator.
Parts
11| Part # | Description | Qty | System | |
|---|---|---|---|---|
| A035N852 | Hose, Drain - Bulk (Order by the Foot - 1 Feet Required) | -1 | Hose | PartsGeek |
| ES100006 | Overcurrent Relay Wiring | Overcurrent relay wiring | PartsGeek | |
| ES100026 | Three Position Stack Switch Wiring | Stack switch wiring | PartsGeek | |
| ES100027 | Distribution Panel Wiring for T360 Series Single Phase Control | Distribution panel wiring | PartsGeek | |
| ES100030 | Standard Generator Wiring for T360 Series | Generator wiring | PartsGeek | |
| ES100039 | Idle-Run Wiring (Cummins) | Idle run wiring | PartsGeek | |
| 134890 | T360 Super Quiet Generator | Service part / kit | PartsGeek | |
| 961-0514 | InPower Service Tool Kit | 1 | Service part / kit | PartsGeek |
| 961-0619 | Generator Set Support | 4 | Service part / kit | PartsGeek |
| A045Z906 | Isolator, Vibration | 1 | Service part / kit | PartsGeek |
| A045Z908 | Bracket, Switch | 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 |
|---|---|---|---|
| Prime | 25% | 24.6 | 6.5 |
| Prime | 50% | 40.9 | 10.8 |
| Prime | 75% | 46.8 | 15.0 |
| Prime | 100% | 75.0 | 19.8 |
| Standby | 25% | 27.3 | 7.2 |
| Standby | 50% | 44.7 | 11.8 |
| Standby | 75% | 64.4 | 17.0 |
| Standby | 100% | 87.1 | 23.0 |
Available documents
Spec sheet — Cummins-300-C300D6R QSM11 (Cummins/Onan)Spec sheet — diesel-gen-set-rating-cards-international-60hz-2025 (Cummins/Onan)