ZF 4699.825.199 GP25 | OEM Genuine Part

Overview

This OEM genuine ZF 4699.825.199 GP25 is a critical gear pump assembly designed for high-pressure hydraulic circuits within ZF construction machinery transmissions. Positioned directly on the transmission housing, this part generates the necessary oil flow for clutch actuation and lubrication. The SKU 4699.825.199 is engineered to exact OEM tolerances, ensuring precise volumetric efficiency and reliable pressure output in demanding off-highway applications. It interfaces directly with the HOUSING to maintain a sealed, pressurized system.

Symptoms of Failure

• Erratic clutch engagement or gear slipping under load: A worn GP25 pump cannot maintain adequate hydraulic pressure, causing delayed or incomplete clutch pack application.
• Audible whining or cavitation noise from the transmission: Internal wear or scoring on the gear faces produces a high-pitched noise, especially during cold starts or at idle.
• Low transmission fluid pressure warnings or sluggish operation: The pump fails to deliver rated flow, triggering diagnostic codes and reducing machine responsiveness.
• Visible oil seepage around the pump mounting flange: Degraded seals or housing cracks allow hydraulic fluid to escape, leading to progressive pressure loss.

Technical Specifications

Compatibility

This GP25 pump is a direct replacement for ZF WG180, WG200, and WG210 series powershift transmissions commonly used in wheel loaders, telehandlers, and graders. It also fits select 4WG-200 and 6WG-200 variants. Always verify the pump orientation and drive tang configuration against your existing INPUT shaft and OUTPUT flange alignment before installation.

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