Specifications
| Fuel | diesel |
|---|---|
| Frequency | 50.0 Hz |
| Standby power | 1360 kW |
| Standby kVA | 1700 |
| Prime power | 1232 kW |
| Emissions | EPA Tier 2 and TA Luft Compliant |
| Oil capacity | 234.7 L |
| Alternator | 55A |
| Voltage options | 50 V, 60 V |
| Phase | Single/Three-Phase |
| Coolant capacity | 294 L |
| Max ambient | 53 °C |
| Dimensions (L×W×H) | 4674×2468×3100 mm |
| Dry weight | 7429 kg |
Engine
| Oil capacity | 235.0 L |
|---|---|
| Coolant capacity | 113.0 L |
| Displacement | 50.0 L |
| Aspiration | Turbocharged and low temperature after-cooled |
| Rated speed | 1500 rpm |
Filters for the Cummins/Onan QSK50-G4
1Engine-mounted filters the filter manufacturers list for this engine family. These come from the engine, not from this generator set’s own parts list, so confirm against your serial number before ordering.
Listed for this engine in only one kind of machine, so they may depend on how the engine was installed:
| System | Filter | Description | Cross-references | |
|---|---|---|---|---|
| Fuel / water separator | P550849 | Fuel Filter, Water Separator Cartridge | CUMMINS 3944901S, NAPA 3763, BALDWIN PF7928, DAVCO 102526 | FridayParts $20.90 KuduParts $39.00 |
Same engine, other brands
1 brandThe Cummins/Onan QSK50-G4 in this set also powers 1 generator set sold under 1 other brand. Service parts and maintenance intervals for the engine are shared; enclosure, alternator, controller and ratings are not.
| Brand | Models |
|---|---|
| MQ Power | 1500 kW Containerized Diesel Generator Set |
Maintenance & consumables
for the Cummins/Onan QSK50-G4| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | — | ||||
| Fuel filter | — | ||||
| Oil filter | — | 222 hr | |||
| Battery | ×4 | — | |||
| Belt | — | ||||
| Coolant | 140.0 | — | |||
| Fuel | ASTM-D975/No.1 or No.2-D | — | |||
| Oil | 235.0 L | — | |||
| Spark plug | — |
Service intervals
2| Item | Action | Hours | Months | Notes |
|---|---|---|---|---|
| valve clearance | Check | 2000 hr | B-Series (4BT3.3): valve clearance checks not required for 2000 hours, twice the industry standard | |
| engine overhaul | Other | 20000 hr | QSK23-Series: expected life cycle to 20,000 hours before first overhaul |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Procedures
1Generator Check List maintenance
- Check coolant level and record freeze protection: -30.
- Visual inspection of radiator.
- Visual inspection of radiator hoses.
- Check condition of coolant hoses.
- Check condition of fuel hoses.
- Check condition of engine belts.
- Check batteries and quantity: 4 x 8D (Core).
- Confirm genset has battery charger.
- Confirm genset has coolant heater.
- Check engine oil level.
- Inspect exhaust system for cracks / leaks.
- Check rain cap for proper operation.
- Confirm generator end is 12 lead reconnectable.
- Confirm generator end has PMG permanent magnet generator.
- Confirm electronic engine.
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 QSK50-G4?
The Cummins/Onan QSK50-G4 is rated 1360 kW standby (1700.0 kVA).
What engine is in the Cummins/Onan QSK50-G4?
The Cummins/Onan QSK50-G4 is powered by the Cummins/Onan QSK50-G4 engine.
What fuel does the Cummins/Onan QSK50-G4 use?
The Cummins/Onan QSK50-G4 runs on diesel.
How much oil does the Cummins/Onan QSK50-G4 take?
The Cummins/Onan QSK50-G4 engine in the Cummins/Onan QSK50-G4 has an oil capacity of 235.0 liters.
What is the cooling system capacity of the Cummins/Onan QSK50-G4?
The Cummins/Onan QSK50-G4 cooling system holds 294 liters (77.7 US gallons) for the radiator system including the engine, per the manufacturer specification sheet.
What is the prime power rating of the Cummins/Onan QSK50-G4?
The Cummins/Onan QSK50-G4 is rated 1232 kW prime (1540 kVA), against 1360 kW standby.
How much does the Cummins/Onan QSK50-G4 weigh?
The Cummins/Onan QSK50-G4 has a dry weight of 7429 kg (16378 lb).
What voltage does the Cummins/Onan QSK50-G4 produce?
The Cummins/Onan QSK50-G4 is offered in 50 V, 60 V, Single/Three-Phase-phase.
What alternator comes on the Cummins/Onan QSK50-G4?
The Cummins/Onan QSK50-G4 uses a 55A alternator.
Repair guides
1Step-by-step procedures compiled from the Cummins/Onan service manual for this model.
Parts
11| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 140-3963 | Cleaner, Air (Spec A-C Metal) | 2 | Air filter | Amazon |
| 149-2792 | Filter, Fuel | 1 | Fuel filter | Amazon eBay |
| 501-0970-01 | Line, Fuel | 1 | Hose | Amazon eBay |
| 503-1705 | Hose, Hump | 2 | Hose | Amazon eBay |
| 503-2754-01 | Hose, Oil | 1 | Hose | Amazon eBay |
| 503-2754-02 | Hose, Oil | 1 | Hose | Amazon eBay |
| 543-0088 | Package, Fuel Filter | 1 | Fuel filter | Amazon eBay |
| 6794600 | Washer, Sealing | 1 | Seal | Amazon eBay |
| AF2559300 | Air Cleaner replacement element (Nelson), for Air Cleaner Housing 140-3737 | 1 | Air filter | Amazon eBay |
| 102-1335 | Plug, Oil Drain | 1 | Service part / kit | Amazon eBay |
| 140-1548 | Indicator, Service | 1 | Service part / kit | Amazon eBay $49.99 NAPA $32.16 |
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 | 100% | 410.0 | 108.0 |
| Standby | 100% | 352.0 | 93.0 |
Available documents
This page was generated from the 7 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.