ZF 4699.025.014 GP25 | OEM Genuine Part

Overview

The ZF 4699.025.014 GP25 is a genuine OEM gear component engineered for the internal planetary gearset of heavy-duty construction machinery transmissions. This precision-machined part, identified by SKU 4699.025.014, functions as a critical power transfer element within the transmission housing, converting rotational speed and torque between the input shaft and the output drive. It sits directly within the main gear train assembly, working in conjunction with the 4699101155 HOUSING and the 4699201018 HOUSING to maintain precise gear alignment and load distribution under extreme operational stress.

Symptoms of Failure

When the ZF 4699.025.014 GP25 begins to wear, operators typically notice distinct performance degradation. Intermittent gear slipping under load is a primary indicator, often accompanied by a grinding noise during acceleration or deceleration. Metallic debris in the transmission fluid signals advanced wear of the gear teeth, while erratic shifting patterns and delayed engagement suggest the gear is no longer meshing correctly with the planetary carrier. A fourth symptom is vibration through the chassis at specific RPM ranges, indicating uneven tooth contact that can damage the 4699309077 HOUSING COVER if left unaddressed.

Technical Specifications

Compatibility

This genuine ZF gear is designed for integration into the WG series of powershift transmissions commonly found in wheel loaders, graders, and dump trucks. It is a direct fit for the ZF WG180 and ZF WG200 transmission models, as well as the ZF 4WG-200 and ZF 6WG-260 variants. The part is also compatible with certain ErgoPower and Ecolife series transmissions that share the same planetary gear architecture. Always verify the gear count and spline profile against your existing assembly before installation.

During replacement, it is standard practice to inspect the mating 0636100132 TORX SCREW for thread wear and to replace the 0634801038 SEALING RING to prevent fluid bypass. The gear set should be checked for proper backlash with the planetary carrier to ensure long service life.

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