Service parts for the QST30-G5
Grouped by system, with how many of each the parts manual calls for.
Air intake
1 requiredPrices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.
Specifications
| Fuel | diesel |
|---|---|
| Frequency | 60.0 Hz |
| Standby power | 1000 kW |
| Standby kVA | 1250 |
| Prime power | 910 kW |
| Emissions | Tier 2 |
| Oil capacity | 154 L (162.7 US qt) |
| Alternator | 35A |
| Voltage options | 24 V |
| Coolant capacity | 202 L |
| Max ambient | 50.0 °C |
| Dimensions (L×W×H) | 2772×1752×2226 mm |
| Dry weight | 3822 kg |
Engine
| Oil capacity | 154 L (162.7 US qt) |
|---|---|
| Coolant capacity | 202.5 L |
| Displacement | 30.0 L |
| Aspiration | Turbocharged and low temperature after-cooled |
| Rated speed | 1800 rpm |
Filters for the Cummins/Onan QST30-G5
4Engine-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 | |
|---|---|---|---|---|
| Oil filter | P551670 | Lube Filter, Spin-On Full Flow | CUMMINS 298670, CUMMINS 299670, NAPA 1970, CARBOCOL 0026 | FridayParts $26.68 |
| Oil filter | P559000 | Lube Filter, Spin-On Full Flow | CUMMINS 2101869, CUMMINS 2882674, NAPA 400107, BALDWIN BD7154 | KuduParts $17.00 FridayParts $36.00 |
| Fuel / water separator | P552216 | Fuel Filter, Water Separator Spin-On Twist&Drain | CUMMINS 3309437, CUMMINS 3313304, NAPA 3613, BALDWIN BF1216 | buy |
| Fuel / water separator | P552006 | Fuel Filter, Water Separator Spin-On Twist&Drain | CUMMINS 3089916, CUMMINS 4095189, NAPA 3645, BALDWIN BF1262 | FridayParts $42.88 |
Same engine, other brands
1 brandThe Cummins/Onan QST30-G5 in this set also powers 5 generator sets sold under 1 other brand. Service parts and maintenance intervals for the engine are shared; enclosure, alternator, controller and ratings are not.
| Brand | Models |
|---|---|
| Katolight | D1000FJZ4, D1000FNZ4, D1000FPZ4, D1000FRZ4, D1000FSZ4 |
Maintenance & consumables
for the Cummins/Onan QST30-G5| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | D041-2 | eBay | |||
| Fuel filter | — | ||||
| Oil filter | — | ||||
| Battery | — | 250 hr | |||
| Belt | — | ||||
| Coolant | 167.0 | — | 6000 hr | ||
| Coolant filter | — | 1500 hr | |||
| Oil | 154 L (162.7 US qt) | — | |||
| 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.
Service specifications
5| Type | Item | Value | Unit | Condition |
|---|---|---|---|---|
| Pressure | Oil Pressure | 51-53 | psi | load bank test 5/3/2024, 5 min to 1 hour, 60 Hz |
| Speed | Hertz/Cycles | 60 | Hz | load bank test 5/3/2024, 5 min to 1 hour |
| Temperature | Ambient Temperature | 67-68 | F | load bank test 5/3/2024 |
| Temperature | Coolant Temperature | 177-179 | F | load bank test 5/3/2024, 5 min to 1 hour, 60 Hz |
| Voltage | DC Voltage | 26.4 | V | load bank test 5/3/2024, 5 min to 1 hour |
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 QST30-G5?
The Cummins/Onan QST30-G5 is rated 1000 kW standby (1250.0 kVA).
What engine is in the Cummins/Onan QST30-G5?
The Cummins/Onan QST30-G5 is powered by the Cummins/Onan QST30-G5 engine.
Is the Cummins/Onan QST30-G5 diesel or gas?
The Cummins/Onan QST30-G5 runs on diesel.
What's the oil capacity on a Cummins/Onan QST30-G5?
The Cummins/Onan QST30-G5 takes 154 L (162.7 US qt) of engine oil (Cummins/Onan QST30-G5 engine specification).
What is the cooling system capacity of the Cummins/Onan QST30-G5?
The Cummins/Onan QST30-G5 cooling system holds 202 liters (53.4 US gallons) for the radiator system including the engine, per the manufacturer specification sheet.
What is the prime power rating of the Cummins/Onan QST30-G5?
The Cummins/Onan QST30-G5 is rated 910 kW prime (1138 kVA), against 1000 kW standby.
What is the dry weight of the Cummins/Onan QST30-G5?
The Cummins/Onan QST30-G5 has a dry weight of 3822 kg (8426 lb).
What voltages is the Cummins/Onan QST30-G5 available in?
The Cummins/Onan QST30-G5 is offered in 24 V.
What alternator comes on the Cummins/Onan QST30-G5?
The Cummins/Onan QST30-G5 uses a 35A alternator.
What air filter fits the Cummins/Onan QST30-G5?
The Cummins/Onan QST30-G5 uses air filter part number D041-2.
Parts
1| Part # | Description | Qty | System | |
|---|---|---|---|---|
| CC2609 | Fleetguard Water-Check H2O 3-Way Test Strips | 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 |
|---|---|---|---|
| Base | 100% | 246.0 | 64.9 |
| Prime | 25% | 69.0 | 18.2 |
| Prime | 50% | 126.0 | 33.1 |
| Prime | 75% | 185.0 | 48.8 |
| Prime | 100% | 248.0 | 65.4 |
| Standby | 100% | 275.0 | 72.65 |
Source — consumption: QST30-G5.
Available documents
This page was generated from the 4 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.