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Cummins/Onan 4D6 Generator Set

The Cummins/Onan 4D6 is a 157.97 kW (192.43 kVA) Diesel standby generator set powered by a Detroit Diesel S50 engine. It is available at 240 V, 208 V and 480 V, 3-phase, 60 Hz and rated 490.7 A. It holds about 6.8 L (1.8 gal) of oil and 9.2 L (2.4 gal) of coolant, with a maximum ambient rating of 40 °C. Starting uses 1 group-24 battery at 24 V. The set measures 3471×1431×2128 mm (136.7×56.3×83.8 in), weighs about 3560 kg (7848 lb) and produces 85 dBA at 7 m. An integrated tank holds 477 L (126.0 gal), roughly 12.2 hours of runtime.

157 kW
Standby
8.5 L
Displacement
6.8 L
Oil capacity
0
Document types

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Specifications

FuelDiesel
Frequency60.0 Hz
Standby power157 kW
Standby kVA192
Prime power117 kW
Emissionsnot stated
Controllernot stated
Oil capacity6.8 L
AlternatorECO 37-1S
Voltage options240 V, 208 V, 480 V
Phase3
Rated current490.7 A
Power factor0.8/1.0
Circuit breaker500 A
Battery group24 V/65 Ah
Battery voltage24 V
Battery quantity1
Coolant capacity9.2 L
Max ambient40 °C
Dimensions (L×W×H)3471×1431×2128 mm
Dry weight3560 kg
Sound level85.0 dBA @ 7 m
Fuel tank477.0 L
Tank runtime12.2 hr

Engine

Detroit Diesel S50
Oil capacity6.8 L
Coolant capacity9.2 L
Displacement8.5 L
Aspirationturbocharged, intercooled
Rated speed1800 rpm

Maintenance & consumables

for the Detroit Diesel S50
ItemSpecCapacityPart #Interval
Air filterClean/Replace—2000 hr find
Fuel filterReplace—500 hr find
Oil filterReplace—2000 hr find
BeltReplace—2000 hr find
CoolantCheck/Clean9.2—500 hr
OilHigh-quality, mineral, hydraulic or synthesized hydrocarbon oil with rust and oxidation inhibitors, anti-foam and anti-wear properties is recommended.6.8—2000 hr

Common questions

What is the power rating of the Cummins/Onan 4D6?

The Cummins/Onan 4D6 is rated 157 kW standby (192.43 kVA).

What engine does the Cummins/Onan 4D6 use?

The Cummins/Onan 4D6 is powered by the Detroit Diesel S50 engine.

What fuel does the Cummins/Onan 4D6 use?

The Cummins/Onan 4D6 runs on Diesel.

What is the oil capacity of the Cummins/Onan 4D6?

The Detroit Diesel S50 engine in the Cummins/Onan 4D6 has an oil capacity of 6.8 liters.

What alternator does the Cummins/Onan 4D6 use?

The Cummins/Onan 4D6 uses a ECO 37-1S alternator.

Troubleshooting

7

Symptoms & remedies

SymptomRemedy
Blown fuse.Replace fuse.
Insufficient residual voltage.Increase the speed by 15 %.
No residual voltage.For an instant apply on the + and – terminals of the electronic regulator a 12 V battery voltage with a 30 Ω resistor in series respecting the polarities.
Connections are interrupted.Check connection cables as per attached drawings.
Voltage potentiometer out of setting.Reset voltage.
Speed variation in engine.Check regularity of rotation.
Regulator out of setting.Regulate stability of regulator by acting on “STABILITY” potentiometer.

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
Prime
Standby

Available documents