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Cummins/Onan 66 DGCC Generator Set

The Cummins/Onan 66 DGCC is a 72 kW (89 kVA) Diesel standby generator set powered by a Cummins/Onan 4BTA3.9G2 engine. It is available at 220 V, 3-phase, 60 Hz and rated 72 A. It holds about 9.5 L (2.5 gal) of oil and 21 L (5.5 gal) of coolant, with a maximum ambient rating of 40 °C. Starting uses 1 group-165 battery at 12 V. An integrated tank holds 197 L (52.0 gal).

72 kW
Standby
3.92 L
Displacement
9.5 L
Oil capacity
1
Document types

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

Typical fuel consumption for 70–75 kW Diesel generators →

Compare with other 70–75 kW Diesel generators →

Service parts for the 66 DGCC

Grouped by system, with how many of each the parts manual calls for.

Air intake

1 required
0140-3765Air filtersee priceAmazon

Prices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.

Specifications

FuelDiesel
Frequency60.0 Hz
Standby power72 kW
Standby kVA89
Prime power66 kW
ControllerPCL
Oil capacity9.5 L
Alternator4BTA3.9G2
Voltage options220 V, 480 V, 60 V
PhaseThree
Rated current72 A
Power factor0.8
Circuit breaker72 A
Battery group165 A/hr
Battery voltage12 V
Battery quantity1
Coolant capacity21.0 L
Max ambient40 °C
Fuel tank197.0 L

Engine

Cummins/Onan 4BTA3.9G2
Oil capacity9.5 L
Coolant capacity21.0 L
Displacement3.92 L
AspirationTurbocharged
Rated speed1800 rpm

Maintenance & consumables

for the Cummins/Onan 4BTA3.9G2
ItemSpecCapacityPart #Interval
Air filter0140-3765 Amazon eBay
Fuel filter—
Oil filter—
Battery—
Belt—
Coolant21.0 L—
Oil11.0 L—
Spark plug×1—

Common questions

What size generator is the Cummins/Onan 66 DGCC?

The Cummins/Onan 66 DGCC is rated 72 kW standby (89.0 kVA).

What engine does the Cummins/Onan 66 DGCC use?

The Cummins/Onan 66 DGCC is powered by the Cummins/Onan 4BTA3.9G2 engine.

What kind of fuel does the Cummins/Onan 66 DGCC run on?

The Cummins/Onan 66 DGCC runs on Diesel.

What's the oil capacity on a Cummins/Onan 66 DGCC?

The Cummins/Onan 4BTA3.9G2 engine in the Cummins/Onan 66 DGCC has an oil capacity of 9.5 liters.

How much coolant does the Cummins/Onan 66 DGCC hold?

The Cummins/Onan 66 DGCC cooling system holds 21 liters (5.5 US gallons) for the radiator system including the engine, per the manufacturer specification sheet.

What is the prime power rating of the Cummins/Onan 66 DGCC?

The Cummins/Onan 66 DGCC is rated 66 kW prime (83 kVA), against 72 kW standby.

What size fuel tank does the Cummins/Onan 66 DGCC have?

The Cummins/Onan 66 DGCC has a 197 liter (52 US gallon) fuel tank.

What voltages is the Cummins/Onan 66 DGCC available in?

The Cummins/Onan 66 DGCC is offered in 220 V, 480 V, 60 V, Three-phase.

How many cold cranking amps does the Cummins/Onan 66 DGCC require?

The Cummins/Onan 66 DGCC uses 1 battery, 12 V each, group 165 A/hr, per the manufacturer specification sheet.

What alternator comes on the Cummins/Onan 66 DGCC?

The Cummins/Onan 66 DGCC uses a 4BTA3.9G2 alternator.

What air filter fits the Cummins/Onan 66 DGCC?

The Cummins/Onan 66 DGCC uses air filter part number 0140-3765.

Fuel consumption

RatingLoadL/hgal/h
Prime100%12.833.8
Standby100%14.538.3

Available documents

Parts manual — 4B 60HZ 32~72kw (Cummins/Onan)

This page was generated from the 1 manufacturer document above by automated extraction; every figure shown is copied from one of them. How the data is compiled.

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