Caterpillar Wheeled loaders
Power steering fluid capacity & service interval
Caterpillar wheeled loaders utilize power steering fluid with a capacity range of 132 to 231 liters. The data covers 2 configurations.
The configuration chart below lists fill volumes and service intervals for each engine and trim variant.
| Type | Specifications |
|---|---|
| 990H, Caterpillar C27 ACERT (2006-2013) |
|
| 992G, Caterpillar 3508B (1998-2007) |
|
Additional Notes
- The 990H wheeled loader, fitted with the Caterpillar C27 ACERT engine, carries a hydraulic tank capacity of 132 liters for the power steering hydraulic system under a flexible maximum use condition.
- The 992G wheeled loader with the Caterpillar 3508B engine lists two distinct capacity figures: 159 liters for the hydraulic tank alone and 231 liters for the total system, reflecting the difference between the reservoir fill volume and the full circuit volume including lines, actuators, and other components.
- The gap between the 992G hydraulic tank figure of 159 liters and the total system figure of 231 liters amounts to 72 liters, which represents the fluid held outside the tank within the broader power steering hydraulic circuit.
- The 990H hydraulic tank capacity of 132 liters is notably lower than the 992G hydraulic tank figure of 159 liters, consistent with the 992G being a larger machine in the Caterpillar wheeled loader lineup.
- Both configurations are specified under a flexible maximum use condition, meaning the 132-liter and 159-liter tank figures represent upper fill limits rather than fixed service quantities.