HomeCummins/OnanCummins/Onan C40D6

Cummins/Onan C40D6 Generator Set

The Cummins/Onan C40D6 is a 40 kW (50 kVA) Diesel standby generator set powered by a Cummins/Onan 4BTAA3.3-G12 engine. It is available at 163/125 V and 150/105 V, 3-phase and 60 Hz. It holds about 7.9 L (2.1 gal) of oil and 10.3 L (2.7 gal) of coolant, with a maximum ambient rating of 55 °C. The set measures 2277×1038×1937 mm (89.6×40.9×76.3 in) and weighs about 1490 kg (3285 lb).

40 kW
Standby
7.9 L
Oil capacity
2
Document types

How to read your Cummins/Onan serial & model number →

Specifications

FuelDiesel
Frequency60.0 Hz
Standby power40 kW
Standby kVA50
Prime power36 kW
EmissionsEPA Tier 3
ControllerPowerStart 600
Oil capacity7.9 L
Voltage options163/125 V, 150/105 V
PhaseWye, 3-phase
Power factor0.8
Coolant capacity10.3 L
Max ambient55 °C
Dimensions (L×W×H)2277×1038×1937 mm
Dry weight1490 kg
Tank runtime12 hr

Engine

Cummins/Onan 4BTAA3.3-G12
AspirationTurbocharged and charge after-cooled
Rated speed1800 rpm

Common questions

What is the power rating of the Cummins/Onan C40D6?

The Cummins/Onan C40D6 is rated 40 kW standby (50.0 kVA).

What engine does the Cummins/Onan C40D6 use?

The Cummins/Onan C40D6 is powered by the Cummins/Onan 4BTAA3.3-G12 engine.

What fuel does the Cummins/Onan C40D6 use?

The Cummins/Onan C40D6 runs on Diesel.

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.

Fuel consumption

RatingLoadL/hgal/h
Prime0%3.91.0
Standby0%4.21.1

Available documents

Spec sheet — D-6565 (Cummins/Onan)Spec sheet — S-6569 (Cummins/Onan)Spec sheet — rental-generator-sets-rating-cards-international-50-60hz-10-2025Reference — 0075763

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