ZF 4699.825.124 GP25 | OEM Genuine Part

Overview

The ZF 4699.825.124 GP25 is a genuine OEM gear pump assembly engineered specifically for heavy-duty construction machinery transmissions. This critical hydraulic component generates the oil flow and pressure required to actuate clutch packs, lubricate planetary gearsets, and cool internal transmission components. As a direct replacement for the original factory part, the SKU 4699.825.124 ensures precise volumetric displacement and pressure regulation within the transmission’s hydraulic circuit. When installed alongside the 4699025067 GP25, this assembly forms the primary hydraulic power source for the entire transmission control system.

Symptoms of Failure

• Delayed or harsh gear engagement – A worn GP25 pump cannot build sufficient hydraulic pressure, causing noticeable hesitation when shifting from neutral to drive or reverse in wheel loaders and graders.
• Transmission overheating – Reduced oil flow from a failing 4699.825.124 leads to inadequate lubrication and cooling, often triggering temperature warning lights during extended operation.
• Intermittent slipping under load – When the pump loses volumetric efficiency, clutch packs fail to hold torque, resulting in random slipping during heavy digging or pushing cycles.
• Whining or cavitation noise – Air entrainment from a worn pump gear set produces a distinct high-pitched whine that increases with engine RPM, indicating imminent failure.

Technical Specifications

Compatibility

This genuine ZF GP25 pump is designed for use in the following transmission families commonly found in construction machinery:

• ZF WG180 – 4-speed powershift transmissions for wheel loaders and telehandlers
• ZF WG200 – Heavy-duty 6-speed transmissions for graders and dozers
• ZF 4WG-200 – Four-speed versions with integrated torque converter
• ZF 6WG-250 – High-torque variants for mining and quarry equipment

When replacing this pump, always inspect the 4699101071 HOUSING for scoring or wear, and verify the 4699102106 INPUT shaft splines are not damaged. The 4699103104 OUTPUT flange must also be checked for concentricity to prevent premature pump failure.

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