The Caterpillar C7.1 ACERT is a 7.01 L 6-cylinder twin turbocharged - air to air aftercooled (tta) engine rated at 1700 rpm, producing up to 129.4 kW. It powers generator sets from Caterpillar, including the XQP150 and XQP200. It holds 18.5 L (4.9 gal) of oil and 46.9 L (12.4 gal) of coolant.
Service parts for the C7.1 ACERT
The cheapest captured merchant offer per filter — see the full cross-reference below for every OEM/aftermarket option.
Prices captured from merchant listings; some links are affiliate links. Verify against your serial number before ordering.
Maintenance schedule
| Item | Spec | Capacity | Part # | Interval | |
|---|
| Air filter | Air Filter | | — | | |
| Fuel filter | Primary filter (10 micron) with integral water separator (330ml capacity) | | — | 500 hr | |
| Oil filter | Primary filter (10 micron) with integral water separator (330ml capacity) | | 4621171 | 500 hr | Amazon eBay $33.99 FridayParts $28.06 |
| Battery | Starting System | | — | | |
| Belt | N/A | | — | | |
| Coolant | Cooling System | 33.0 L (gal) | — | | |
| Oil | Lubricating System | 12.4 L (gal) | — | 500 hr | |
| Spark plug | N/A | | — | | |
Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.
Common questions
What is the oil capacity of the Caterpillar C7.1 ACERT?
The Caterpillar C7.1 ACERT engine has an oil capacity of 18.5 liters.
What is the displacement of the Caterpillar C7.1 ACERT?
The Caterpillar C7.1 ACERT has a displacement of 7.01 liters with 6 cylinders.
Which generators use the Caterpillar C7.1 ACERT engine?
The Caterpillar C7.1 ACERT powers 2 generator set(s), including Caterpillar XQP150, Caterpillar XQP200.
What oil filter does the Caterpillar C7.1 ACERT use?
The Caterpillar C7.1 ACERT uses oil filter part numbers Caterpillar 4621171, Donaldson P550920, Wix 57325.
How often should you change the oil in the Caterpillar C7.1 ACERT?
The Caterpillar C7.1 ACERT oil change interval is every 500 hours.