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Caterpillar D40-6 Generator Set

The Caterpillar D40-6 is a 40 kW (40 kVA) diesel standby generator set powered by a Caterpillar C4.4 engine. It is available at 240/120 V, single-phase and 60 Hz. It holds about 8 L (2.1 gal) of oil and 16.5 L (4.4 gal) of coolant, with a maximum ambient rating of 50 °C.

40 kW
Standby
4.4 L
Displacement
8.0 L
Oil capacity
1
Document types

How to read your Caterpillar serial & model number →

Specifications

Fueldiesel
Frequency60.0 Hz
Standby power40 kW
Standby kVA40
Prime power36 kW
EmissionsEPA Tier 3 Nonroad Standards (Equivalent)
ControllerEMCP 4.2
Oil capacity8.0 L
AlternatorLC1514L (4-pole, Class H insulation)
Voltage options240/120 V
Phasesingle
Power factor1
Coolant capacity16.5 L
Max ambient50 °C

Engine

Caterpillar C4.4
Oil capacity8.0 L
Coolant capacity17.5 L
Displacement4.4 L
AspirationTurbocharged Air To Air Charge Cooled
Rated speed1500 rpm

Maintenance & consumables

for the Caterpillar C4.4
ItemSpecCapacityPart #Interval
Air filterDry cartridge type1000 hr find
Fuel filterDuplex cartridge type500 hr find
Oil filterSpin-on type500 hr find
BeltN/A find
CoolantWater cooled oil cooler
OilCat TDTO or equivalent8.4500 hr

Common questions

What is the power rating of the Caterpillar D40-6?

The Caterpillar D40-6 is rated 40 kW standby (40.0 kVA).

What engine does the Caterpillar D40-6 use?

The Caterpillar D40-6 is powered by the Caterpillar C4.4 engine.

What fuel does the Caterpillar D40-6 use?

The Caterpillar D40-6 runs on diesel.

What is the oil capacity of the Caterpillar D40-6?

The Caterpillar C4.4 engine in the Caterpillar D40-6 has an oil capacity of 8.0 liters.

What alternator does the Caterpillar D40-6 use?

The Caterpillar D40-6 uses a LC1514L alternator. It has 4 poles. Insulation class H.

Parts

3
Part #DescriptionQtySystem
AEXQ3237-00Keyless push-to-start engine controlKeyless push-to-start engine control PartsGeek
AN500T0010STARTER MOTORStarter PartsGeek
AN500T0093ALTERNATORAlternator 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 — CAT-40-kW-D40-C4.4 (Caterpillar)