ZF 4699.803.038 GK20 | OEM Genuine Part

Overview

The ZF 4699.803.038 GK20 is a precision-engineered OEM genuine part designed for heavy-duty construction machinery transmissions. This component serves as a critical interface within the gearbox assembly, ensuring proper alignment and sealing between the main housing and rotating shafts. As a genuine ZF part, the SKU 4699.803.038 guarantees exact fitment and durability under extreme loads, reducing downtime in excavators, wheel loaders, and graders. It is typically located in the mid-section of the transmission, where it supports torque transfer and prevents contamination ingress.

Symptoms of Failure

When the ZF 4699.803.038 GK20 wears out, operators often notice oil leaks around the transmission housing—a common long-tail search query for construction machinery repair. Another frequent issue is gear slipping under load, especially during low-speed maneuvering, as the part loses its sealing integrity. You may also detect unusual whining or grinding noises from the transmission, indicating misalignment. Finally, erratic shifting between forward and reverse gears can occur, pointing to internal pressure loss caused by a degraded 4699.803.038.

Technical Specifications

Compatibility

This genuine ZF part is primarily compatible with the WG180 and WG200 transmission series, commonly used in construction machinery from brands like Liebherr, Volvo, and Caterpillar. It also fits select WG150 and WG250 models where the GK20 adapter is specified. Always verify your transmission serial number before ordering. For related assemblies, the 4699101024 HOUSING and 4699301077 HOUSING are direct neighbors in the gearbox. Additionally, the 4699301017 BEARING COVER and 4699301085 COVER are frequently replaced together with this part during a full seal overhaul.

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