ZF 4699.825.038 GP25 | OEM Genuine Part

Overview

The ZF 4699.825.038 GP25 is a genuine OEM gear pump assembly engineered for high-pressure hydraulic circuits within ZF powershift transmissions. This SKU 4699.825.038 serves as the primary fluid mover, drawing oil from the sump and delivering it to the torque converter, clutch packs, and lubrication circuits. It mounts directly to the transmission housing and is driven by the engine through a gear train. When paired with a robust HOUSING, the GP25 ensures consistent volumetric flow essential for shift quality and thermal management in heavy construction machinery.

Symptoms of Failure

• Delayed or harsh shifting: Worn internal clearances cause pressure drop, leading to sluggish engagement or abrupt gear changes during operation.
• Low hydraulic pressure at idle: A failing GP25 cannot maintain minimum standby pressure, triggering warning lights or transmission protection modes.
• Whining or cavitation noise: Air ingestion due to a compromised suction line or worn pump gears produces a high-pitched sound, often accompanied by foaming oil.
• Overheating transmission fluid: Reduced flow from the 4699.825.038 starves the cooler, causing rapid temperature spikes under load.

Technical Specifications

Compatibility

This genuine GP25 pump is primarily specified for ZF WG180, WG200, and WG210 series transmissions used in wheel loaders, graders, and dozers. It also appears in select ErgoPower and Ecolife models requiring a 25cc gear pump. Always verify the mounting flange pattern against your existing HOUSING and confirm the drive gear alignment. The pump mates with a HOUSING COVER and is secured using CAP SCREW fasteners to prevent leakage.

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