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
| Standby power | 1069 kW |
|---|---|
| Standby kVA | 1434 |
| Prime power | 975 kW |
| Emissions | Tier 2 |
| Oil capacity | 40.7 L |
| 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 | 154.0 L |
|---|---|
| Coolant capacity | 202.5 L |
| Displacement | 30.5 L |
| Aspiration | Turbocharged and low temperature after-cooled |
| Rated speed | 1800 rpm |
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 | 154.0 L | — | |||
| Spark plug | — |
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 1069 kW standby (1434.0 kVA).
What engine is in the Cummins/Onan QST30-G5?
The Cummins/Onan QST30-G5 is powered by the Cummins/Onan QST30-G5 engine.
What's the oil capacity on a Cummins/Onan QST30-G5?
The Cummins/Onan QST30-G5 engine in the Cummins/Onan QST30-G5 has an oil capacity of 154.0 liters.
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 975 kW prime (1308 kVA), against 1069 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 |
Available documents
This page was generated from the 3 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.