Specifications
| Fuel | diesel |
|---|---|
| Frequency | 60.0 Hz |
| Standby power | 2500 kW |
| Standby kVA | 3438 |
| Prime power | 2335 kW |
| Emissions | Tier4F |
| Controller | PowerCommand, PowerCommand electronic |
| Oil capacity | 312.0 L |
| Alternator | P80X |
| Voltage options | 380 V, 480 V, 4160 V, 1320 V, 440 V, 600 V, 1247 V, 1380 V |
| Phase | A (U), B (V), C (W) |
| Power factor | < 5% no load to full linear load, < 3% for any single harmonic |
| Battery cranking | 2200 amps minimum at ambient temperature of -18 °C to 0°C (0°F to 32°F) CCA |
| Dimensions (L×W×H) | 7138×2750×3387 mm |
| Dry weight | 22865 kg |
| Wet weight | 24090 kg |
Engine
| Oil capacity | 312.0 L |
|---|---|
| Displacement | 77.6 L |
| Aspiration | 4-cycle, industrial diesel |
| Rated speed | 1800 rpm |
Maintenance & consumables
for the Cummins/Onan QSK78| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Replace air filter element every 250 hours or as recommended by the engine manufacturer. | — | 250 hr | ||
| Fuel filter | Change fuel filter every 10,000 hours or as recommended by the engine manufacturer. | — | 10000 hr | ||
| Oil filter | Change oil filter every 125 hours or as recommended by the engine manufacturer. | — | 125 hr | ||
| Battery | Battery maintenance and testing every 12 months or as recommended by the battery manufacturer. | — | 43800 hr | ||
| Belt | Inspect belts for wear and replace if necessary. Replace every 5,000 hours or as recommended by the engine manufacturer. | — | 5000 hr | ||
| Coolant | Change coolant every 12,000 hours or as recommended by the engine manufacturer. | — | 12000 hr | ||
| Oil | Change oil and filter every 125 hours or as recommended by the engine manufacturer. | — | 125 hr | ||
| Spark plug | Replace spark plugs every 1,250 hours or as recommended by the engine manufacturer. | — | 1250 hr |
Common questions
What is the power rating of the Cummins/Onan QSK78 series?
The Cummins/Onan QSK78 series is rated 2500 kW standby (3438.0 kVA).
What engine is in the Cummins/Onan QSK78 series?
The Cummins/Onan QSK78 series is powered by the Cummins/Onan QSK78 engine.
Is the Cummins/Onan QSK78 series diesel or gas?
The Cummins/Onan QSK78 series runs on diesel.
What is the oil capacity of the Cummins/Onan QSK78 series?
The Cummins/Onan QSK78 engine in the Cummins/Onan QSK78 series has an oil capacity of 312.0 liters.
What alternator does the Cummins/Onan QSK78 series use?
The Cummins/Onan QSK78 series uses a P80X alternator.
Parts
1| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 908-0600 | Cummins QSK78 Series Engine Operation and Maintenance Manual | 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.
Available documents
Spec sheet — s-1529 (Cummins/Onan)Spec sheet — s-1529DC (Cummins/Onan)Spec sheet — s-1628 (Cummins/Onan)Spec sheet — s-1628DC (Cummins/Onan)Spec sheet — s-1677DC 0 (Cummins/Onan)