ZF 4699.825.213 GP25 | OEM Genuine Part

Overview

The ZF 4699.825.213 GP25 is a genuine OEM gear pump assembly engineered for high-pressure hydraulic circuits within ZF construction machinery transmissions. This component is the primary hydraulic power source, delivering precise oil flow to actuate clutch packs and lubrication channels. Positioned directly on the transmission housing, the GP25 pump draws fluid from the sump and pressurizes it for gear engagement. The SKU 4699.825.213 is a direct replacement unit, ensuring factory-specified flow rates and pressure relief calibration for demanding off-highway applications.

Symptoms of Failure

• Delayed or harsh gear engagement: When the GP25 pump loses volumetric efficiency, clutch pack fill times increase, causing sluggish shifts or sudden engagement jolts.
• Low system pressure warnings: A worn pump rotor or damaged housing bores will trigger pressure drop alerts on the machine’s dashboard, especially under load.
• Transmission overheating: Inadequate oil circulation from a failing pump leads to elevated sump temperatures, often accompanied by foaming oil.
• Whining or cavitation noise: Air ingestion through a worn seal or cracked HOUSING creates a high-pitched whine during operation.

Technical Specifications

Compatibility

This GP25 pump is designed for integration into ZF WG180, WG200, and WG211 series transmissions commonly used in wheel loaders, telehandlers, and graders. It mounts directly to the transmission’s main HOUSING and is secured with TORX SCREW fasteners. The pump’s drive gear interfaces with the transmission’s input shaft. For complete assembly, the HOUSING COVER must be installed over the pump cavity to maintain proper backpressure and sealing.

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