The Caterpillar 3456 ATAAC is a 15.8 L turbocharged-ataac engine rated at 1800 rpm. It powers generator sets from Caterpillar, including the XQ 500, XQ300 and XQ400. It holds 38 L (10.0 gal) of oil and 64 L (16.9 gal) of coolant.
Also known as: CAT 3456 ATAAC
Part of the Caterpillar 3456 engine family — 2 variants share parts & fitment.
| Oil capacity | 38.0 L |
|---|---|
| Coolant capacity | 64.0 L |
| Displacement | 15.8 L |
| Aspiration | turbocharged-ataac |
| Rated speed | 1800 rpm |
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Air Inlet System | 1063973 | 5000 hr | PartsGeek FridayParts $62.16 | |
| Fuel filter | — | 1200 hr | find | ||
| Oil filter | — | 1200 hr | find | ||
| Belt | — | 1200 hr | find | ||
| Coolant | Cooling System | 74.2 l (qts.) | — | ||
| Oil | 38.0 l (qts.) | — | 500 hr |
Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.
Cross-referenced via Donaldson + OEM/engine-maker interchange — options to verify against your serial number, not confirmed for every exact variant.
Other equipment known to use this engine, via filter-application cross-reference — useful for sourcing parts even when your exact machine isn't listed elsewhere on this page.
The Caterpillar 3456 ATAAC engine has an oil capacity of 38.0 liters.
The Caterpillar 3456 ATAAC has a displacement of 15.8 liters.
The Caterpillar 3456 ATAAC powers 3 generator set(s), including Caterpillar XQ 500, Caterpillar XQ300, Caterpillar XQ400.
The Caterpillar 3456 ATAAC uses oil filter part numbers Caterpillar 3890434, Caterpillar 2P4005, Donaldson P551808.
The Caterpillar 3456 ATAAC uses fuel filter part numbers Caterpillar 1165436, Caterpillar 5134490, Donaldson P550625.
The Caterpillar 3456 ATAAC uses air filter part numbers Caterpillar 1063973, Donaldson P533884, Wix 46747.
The Caterpillar 3456 ATAAC oil change interval is every 500 hours.