ZF 4699.825.048 GP25 | OEM Genuine Part

Overview

The ZF 4699.825.048 GP25 is a critical OEM genuine gear pump assembly engineered for high-pressure hydraulic actuation within ZF heavy-duty powershift transmissions. This component, identified by SKU 4699.825.048, serves as the primary hydraulic power source, delivering precise oil flow to engage clutches and modulate torque converter lock-up. It mounts directly to the transmission housing, interfacing with the drive gear train. The GP25 designation indicates a specific displacement and pressure rating optimized for construction machinery applications. For complete sealing of the pump cavity, ensure the 4699101070 HOUSING and 4699301146 HOUSING are inspected for wear during replacement.

Symptoms of Failure

When the ZF 4699.825.048 GP25 begins to degrade, operators will notice distinct operational issues. Erratic gear engagement or transmission slipping under load is a primary indicator, as insufficient pump pressure prevents clutch packs from fully locking. Hydraulic whining or cavitation noise from the transmission sump signals internal wear or air ingestion. Slow or delayed shift response during direction changes (forward to reverse) points to declining pump volumetric efficiency. Finally, visible oil leaks around the pump mounting flange often accompany seal failure, requiring replacement of the 0636101411 CAP SCREW and gasket surfaces.

Technical Specifications

Compatibility

This GP25 pump (4699.825.048) is primarily specified for ZF WG180, WG200, and WG210 series powershift transmissions commonly found in wheel loaders, graders, and telehandlers. It also serves as a direct replacement in certain ZF 4WG-200 and 6WG-200 variants used in construction machinery. The 4699309085 HOUSING COVER must be correctly torqued to maintain alignment. Always verify the pump drive shaft spline count against your transmission model before installation.

Related Components