ZF 4699.804.055 GK25 | OEM Genuine Part

Overview

The ZF 4699.804.055 GK25 is a precision-engineered OEM genuine part designed for the hydraulic control system within ZF heavy-duty transmissions. This component functions as a critical valve or actuator body, managing fluid pressure and flow to ensure smooth gear engagement in construction machinery. As a direct OEM replacement, the SKU 4699.804.055 guarantees exact fitment and original performance specifications, eliminating the guesswork of aftermarket alternatives. It sits within the transmission’s valve body assembly, directly interacting with the 4699101043 HOUSING and the 4699301106 HOUSING to maintain hydraulic integrity.

Symptoms of Failure

When the ZF 4699.804.055 GK25 begins to wear, operators often notice distinct performance issues. Hydraulic pressure loss during gear shifts is a primary symptom, leading to delayed or harsh engagement. External oil seepage around the valve body area frequently occurs as internal seals degrade. Another common sign is intermittent gear slipping under load, particularly when operating on inclines. Finally, erratic shift patterns or failure to engage specific gears can indicate internal spool wear within this part.

Technical Specifications

Compatibility

This OEM genuine part is engineered for ZF WG-series transmissions commonly found in construction loaders and graders. It is directly compatible with the ZF WG180, WG200, and WG210 series. Additionally, it fits select ZF 4WG-200 and ZF 6WG-250 models used in heavy earthmoving equipment. Always verify your transmission model number before ordering. For full assembly integrity, inspect the 4699301015 HOUSING COVER and the 4699301085 COVER for wear during replacement.

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