HomeCummins/OnanCummins/Onan 40

Cummins/Onan 40 Generator Set

The Cummins/Onan 40 is a 36 kW (45 kVA) Diesel standby generator set powered by a Cummins/Onan 4B3.3 engine. It is available at 380/220 V, 400/230 V, 416/240 V, 440/255 V and 480/277 V, 1-phase, 60 Hz and rated 0 A. It holds 0 L (None gal) of coolant, with a maximum ambient rating of 55 °C. Starting uses 0 group-0 battery at 12 V. The set measures 0×0×0 mm (None×None×None in), weighs about 0 kg (None lb) and produces 0 dBA at 0 m. An integrated tank holds 0 L (None gal), roughly 0 hours of runtime.

36 kW
Standby
3.3 L
Displacement
1
Document types

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Specifications

FuelDiesel
Frequency60.0 Hz
Standby power36 kW
Standby kVA45
EmissionsEPA Tier 3
ControllerPowerStart
Oil capacity0.0 L
AlternatorCummins/Onan C40D6R
Voltage options380/220 V, 400/230 V, 416/240 V, 440/255 V, 480/277 V
Phase1-Phase
Rated current0 A
Power factor0
Circuit breaker0 A
Battery group0
Battery voltage12 V
Battery quantity0
Coolant capacity0 L
Max ambient55 °C
Dry weight0.0 kg
Sound level0.0 dBA @ 0 m
Fuel tank0.0 L
Tank runtime0 hr

Engine

Cummins/Onan 4B3.3
Oil capacity0.0 L
Coolant capacity0.0 L
Displacement3.3 L
AspirationTurbocharged after-cooled
Rated speed0.0 rpm

Common questions

What is the power rating of the Cummins/Onan 40?

The Cummins/Onan 40 is rated 36 kW standby (45.0 kVA).

What engine does the Cummins/Onan 40 use?

The Cummins/Onan 40 is powered by the Cummins/Onan 4B3.3 engine.

What fuel does the Cummins/Onan 40 use?

The Cummins/Onan 40 runs on Diesel.

What alternator does the Cummins/Onan 40 use?

The Cummins/Onan 40 uses a Cummins/Onan C40D6R alternator.

Troubleshooting

5

Fault codes

CodeMeaning
59High AC voltage shutdown
27Low AC voltage shutdown
81 uUnder frequency shutdown
51High Current warning/shutdown
81 oOver frequency shutdown/warning

Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.

Parts

9
Part #DescriptionQtySystem
25164640SPARK PLUG,(*33,35 )(AC- R45TS)(AC-DELCO #2)4Spark plug PartsGeek
A-345052Engine oxygen sensorSensor PartsGeek
AN500T0119ALTERNATORAlternator PartsGeek
D1053/1feeler gauge (D2)Air filter PartsGeek
GM28980UEGO Oxygen SensorSensor PartsGeek
432PSV6551Selector Switch1Service part / kit PartsGeek
D1050/1wing nut (A1)Service part / kit PartsGeek
D1056/1lock nut (C2)Service part / kit PartsGeek
D1057/1adjuster screw (C3)Service part / kit PartsGeek

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 — Cummins-C65D6 4BT3.9 (Cummins/Onan)Spec sheet — S-6569 (Cummins/Onan)