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Caterpillar XQ400 Generator Set

The Caterpillar XQ400 is a 365 kW standby generator set powered by a Caterpillar 3456 ATAAC engine. It is available at 240 V and 480 V, three phase-phase and 60 Hz. It holds about 38 L (10.0 gal) of oil and 64 L (16.9 gal) of coolant. The set measures 5080×1549×2827.3 mm (200.0×61.0×111.3 in), weighs about 7620 kg (16799 lb) and produces 75.35 dBA at 23 m. An integrated tank holds 1780 L (470.2 gal), roughly 24 hours of runtime.

365 kW
Standby
15.8 L
Displacement
38.0 L
Oil capacity
1
Document types

How to read your Caterpillar serial & model number →

Specifications

Frequency60.0 Hz
Standby power365 kW
Oil capacity38.0 L
AlternatorCaterpillar SR4B
Voltage options240 V, 480 V
Phasethree phase
Circuit breaker1600 A
Coolant capacity64 L
Dimensions (L×W×H)5080×1549×2827 mm
Dry weight7620 kg
Sound level75.35 dBA @ 23 m
Fuel tank1780.0 L
Tank runtime24 hr

Engine

Caterpillar 3456 ATAAC
Oil capacity38.0 L
Coolant capacity64.0 L
Displacement15.8 L
Aspirationturbocharged-ataac
Rated speed1800 rpm

Maintenance & consumables

for the Caterpillar 3456 ATAAC
ItemSpecCapacityPart #Interval
Air filter10639735000 hr PartsGeek FridayParts $62.16
Fuel filter1200 hr find
Oil filter1200 hr find
Belt1200 hr find
CoolantCooling System
OilEngine lube oil capacity500 hr

Compatible filters for the Caterpillar 3456 ATAAC — cross-referenced via Donaldson. Options to verify against your serial number, not confirmed for this exact unit.

  • Fuel filter: Caterpillar 1165436 Caterpillar 5134490 Donaldson P550625 Donaldson P551858
  • Oil filter: Caterpillar 3890434 Caterpillar 2P4005 Donaldson P551808 Donaldson P554005 Ac Delco PF879L

Common questions

What is the power rating of the Caterpillar XQ400?

The Caterpillar XQ400 is rated 365 kW standby.

What engine does the Caterpillar XQ400 use?

The Caterpillar XQ400 is powered by the Caterpillar 3456 ATAAC engine.

What is the oil capacity of the Caterpillar XQ400?

The Caterpillar 3456 ATAAC engine in the Caterpillar XQ400 has an oil capacity of 38.0 liters.

What alternator does the Caterpillar XQ400 use?

The Caterpillar XQ400 uses a Caterpillar SR4B alternator.

Fuel consumption

RatingLoadL/hgal/h
Prime75%74.119.6
Standby109.829.0

Available documents

Spec sheet — XQ400-3456-Spec-Sheet (Caterpillar)

Other sets with this engine