Specifications
| Frequency | 60.0 Hz |
|---|---|
| Standby power | 1250 kW |
| Standby kVA | 1563 |
| Prime power | 1136 kW |
| Emissions | EPA Tier 2 |
| Controller | PowerCommand digital |
| Oil capacity | 186.0 L |
| Voltage options | 220/380 V, 225/440 V, 2400/4160 V, 3810/6600 V, 6350/1100 V, 277/480 V, 347/600 V, 3637/6300 V, 3983/6900 V |
| Phase | A (U), B (V), C (W) |
| Circuit breaker | 3200 A |
| Dimensions (L×W×H) | 5085×2184×2406 mm |
| Dry weight | 9197 kg |
Engine
| Oil capacity | 186.0 L |
|---|---|
| Coolant capacity | 112.0 L |
| Displacement | 37.8 L |
| Aspiration | 4-cycle industrial diesel |
| Rated speed | 1800 rpm |
Maintenance & consumables
for the Cummins/Onan QSK38| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | — | ||||
| Fuel filter | — | ||||
| Oil filter | — | ||||
| Battery | — | ||||
| Belt | — | ||||
| Coolant | — | ||||
| Oil | — | ||||
| Spark plug | — |
Service intervals
5| Item | Action | Hours | Months | Notes |
|---|---|---|---|---|
| Lubricating oil | Test | 250 hr | 6 mo | First service — For high horsepower engines with Eliminator™ oil filter option: take oil samples every 250 hours and analyze per Cummins Engine Oil Recommendations Bulletin 3810340; repeat for at least three oil change intervals. |
| filters | Change | 1000 hr | with CENTINEL, depending on load factors | |
| ELIMINATOR self cleaning filter core | Other | 1500 hr | Requires servicing only every 1,500 hours. Saves up to 90% of lube system maintenance costs and increases productivity. | |
| fuel filter | Change | 1500 hr | Fleetguard NanoNet media | |
| engine oil | Change | 4500 hr | with CENTINEL, railway applications |
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 |
|---|---|---|---|---|---|
| Engine oil | Cummins Engine Oil Recommendations Bulletin 3810340 | Used to analyze oil samples for high horsepower engines with Eliminator™ oil filter option. | |||
| Fuel | B100 biodiesel | ASTM D6751 | Must conform prior to blending; revised to include a cold soak test; stability requirement still in effect. | ||
| Fuel | B20 biodiesel blend | ASTM D7467 | Applies to biodiesel blends B6–B20; includes oxidation stability requirement; replaces Cummins' previous EMA B20 specification requirement. Must be purchased from a BQ9000 Certified Marketer; B100 must be sourced from a BQ9000 Accredited Producer. | ||
| Fuel | B5 biodiesel | All Cummins automotive and industrial engines are compatible with B5 biodiesel. | |||
| Fuel | biodiesel (Europe) | EN 14214 | Published by CEN, European Committee for Standardization. Equivalent biodiesel specifications required internationally. |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Procedures
2Oil sampling for high horsepower engines with Eliminator™ oil filter option maintenance
- Take oil samples every 250 hours of operation.
- Analyze samples according to Cummins Engine Oil Recommendations Bulletin 3810340.
- Repeat for at least three oil change intervals to ensure consistent oil behavior.
Switching from petrodiesel to B20 on used engines maintenance
⚠ B20 has a solvent nature and may clean the vehicle fuel tank and lines.
- Install new fuel filters when switching to B20.
- Replace fuel filters at half the standard interval for the next two fuel filter changes.
- After the initial period, revert to intervals specified in the O & M manual.
- For EPA 2007 on-highway midrange engines, sample oil for the first 6 months to monitor fuel dilution.
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 QSK38?
The Cummins/Onan QSK38 is rated 1250 kW standby (1563.0 kVA).
What engine is in the Cummins/Onan QSK38?
The Cummins/Onan QSK38 is powered by the Cummins/Onan QSK38 engine.
How much oil does the Cummins/Onan QSK38 take?
The Cummins/Onan QSK38 engine in the Cummins/Onan QSK38 has an oil capacity of 186.0 liters.
What is the cooling system capacity of the Cummins/Onan QSK38?
The Cummins/Onan QSK38 cooling system holds 112 liters (29.6 US gallons) for the engine, per the manufacturer specification sheet.
What is the prime power rating of the Cummins/Onan QSK38?
The Cummins/Onan QSK38 is rated 1136 kW prime (1420 kVA), against 1250 kW standby.
What is the dry weight of the Cummins/Onan QSK38?
The Cummins/Onan QSK38 has a dry weight of 9197 kg (20275 lb).
What voltages is the Cummins/Onan QSK38 available in?
The Cummins/Onan QSK38 is offered in 220/380 V, 225/440 V, 2400/4160 V, 3810/6600 V, 6350/1100 V, 277/480 V, A (U), B (V), C (W)-phase.
Parts
4| Part # | Description | Qty | System | |
|---|---|---|---|---|
| MCBQSK0068 | Water Pump Gasket Set | Gasket | Amazon eBay | |
| M-2885786 | Cylinder Liner Kit | Service part / kit | Amazon eBay | |
| M-3007525 | Cylinder Liner Kit | 1 | Service part / kit | Amazon eBay |
| M-3022157 | Cylinder Liner | 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
This page was generated from the 11 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.