ZF 4699.804.091 GK25 | OEM Genuine Part

Overview

The ZF 4699.804.091 GK25 is a critical OEM genuine component designed for heavy-duty construction machinery transmissions. This part functions as a precision-engineered gear kit or shift assembly within the transmission housing, ensuring smooth power transfer and gear engagement under extreme loads. Specifically, the SKU 4699.804.091 sits within the valve body or clutch pack area, regulating hydraulic flow to facilitate gear changes. As a genuine ZF part, it guarantees exact tolerances and material integrity, reducing the risk of premature wear in demanding environments like excavators and wheel loaders.

Symptoms of Failure

When the ZF 4699.804.091 GK25 begins to fail, operators may notice specific performance issues. Common failure symptoms include:

• Erratic gear engagement or slipping: The transmission may hesitate or fail to hold a gear under load, often accompanied by a grinding noise.
• Hydraulic fluid leaks: Worn seals or gaskets around this assembly can cause oil to seep from the transmission housing, leading to low fluid levels.
• Delayed shifting: A noticeable lag when moving from neutral to drive or reverse, indicating internal pressure loss.
• Overheating transmission: Inefficient gear engagement generates excess friction, raising operating temperatures and accelerating component wear.

Technical Specifications

Compatibility

This OEM genuine part is engineered for use in ZF WG180, WG200, and WG210 series transmissions commonly found in construction machinery such as Caterpillar, Volvo, and Komatsu loaders. It also fits select ZF 4WG-200 and 6WG-200 models. Always verify your transmission model and serial number before installation. For a complete rebuild, consider pairing this part with the 4699101043 HOUSING and the 4699301106 HOUSING to ensure proper alignment. The 4699301015 HOUSING COVER and 4699301085 COVER are also frequently replaced simultaneously to prevent contamination.

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