Caterpillar D40 Specs (Power | Consumption)

The Caterpillar D40 generator is listed with standby output of 40 kW, diesel fuel, 60 Hz operation, 4 available voltage configurations, and 3 phase.

Caterpillar Generator Specifications

Generator • diesel • 60 Hz • 3 phase

Standby power: 40 kWVoltage options: 4 configurationsDry weight: 675 lb (306 kg)

Key specifications

40 kW Standby power

diesel Fuel

4 configurations Voltage options

3 phase Phase

675 lb (306 kg) Dry weight

60 Hz Frequency

Useful generator charts

Charts are shown only when this model has enough usable source data.

Fuel consumption by load

How fuel use changes as generator load increases.

No load

3.9 gal/hr

50% load

2.1 gal/hr

75% load

2.9 gal/hr

100% load

3.7 gal/hr

Power-to-weight

Standby output per 1,000 lb of dry weight compared with a fixed industry reference for this output class.

This model

59.3 kW

Typical reference

34 kW

High for this output class

Power output

Low 36 kW High 40 kW

Standby

40 kW

Prime

36 kW

Model spec snapshot

Representative numeric specifications from this generator.

40 kWStandby

674.61 lbWeight

How the Caterpillar D40 compares

Low, Typical and High are fixed generator-industry reference bands set by standby-output class. They do not change based on the models contained in this CSV.

Standby power

40 kW

Typical range

Typical: 45 kW

Dry weight

675 lb

Low range

Typical: 1,598 lb

Oil capacity

2.22 gal

Low range

Typical: 2.91 gal

Standby power40 kW · Typical

Low 30 kWTypical 45 kWHigh 60 kW

Falls within the typical industry reference range for generators in this standby-output class.

Dry weight675 lb · Low

Low 794 lbTypical 1,598 lbHigh 2,998 lb

Falls toward the low end of the fixed industry reference range for generators in this standby-output class.

Oil capacity2.22 gal · Low

Low 1.32 galTypical 2.91 galHigh 5.81 gal

Falls toward the low end of the fixed industry reference range for generators in this standby-output class.

This model Typical industry reference

Generator information

Manufacturer	Caterpillar
Model	D40
Generator type	Generator
Fuel	diesel
Frequency	60 Hz

Electrical output

Standby power	40 kW
Prime power	36 kW
Standby kVA	50.0
Voltage options	208 V, 240 V, 480 V, 600 V
Phase	3 phase
Power factor	0.8

Engine, cooling and controls

Engine model	Caterpillar C4.4
Engine displacement	269 cu in (4.4 L)
Aspiration / cooling	Turbocharged Air To Air Charge Cooled
Rated engine speed	1500 rpm
Engine oil capacity	2.11 gal (8 L)
Engine coolant capacity	4.62 gal (17.5 L)
Oil capacity	2.22 gal (8.4 L)
Coolant capacity	4.36 gal (16.5 L)
Maximum ambient	122 °F (50 °C)
Controller	EMCP 3.1, EMCP 4, EMCP 4.2
Alternator	LC1514L (4-pole, Class H insulation)
Emissions	Tier 3

Physical specifications

Dry weight	675 lb (306 kg)
Dimensions (L × W × H)	76.1 × 43.7 × 69.6 in (1932 × 1110 × 1767 mm)

Fuel consumption

Standby	3.9 gal/h (14.6 L/h) @ 50%; 2.1 gal/h (8.1 L/h) @ 75%; 2.9 gal/h (10.8 L/h) @ 100%; 3.7 gal/h (13.9 L/h)
Prime	2.0 gal/h (7.6 L/h) @ 50%; 2.6 gal/h (10.0 L/h) @ 75%; 3.3 gal/h (12.6 L/h) @ 100%

Maintenance and service parts

Engine oil	Interval: 500 hr; Specification: Cat TDTO or equivalent; Capacity: 8.4
Oil filter	Interval: 500 hr; Specification: Spin-on type
Fuel filter	Interval: 500 hr; Specification: Duplex cartridge type
Air filter	Interval: 1000 hr; Specification: Dry cartridge type
Coolant	Specification: Water cooled oil cooler

Disclaimer: Specifications should be verified against the official owner’s or service manual and confirmed on the Caterpillar USA website.