ZF 4699.003.017 GK20 | OEM Genuine Part

Overview

The ZF 4699.003.017 GK20 is a precision-engineered OEM genuine part designed for integration within the clutch pack assembly of heavy-duty ZF construction machinery transmissions. This component, identified by SKU 4699.003.017, functions as a critical intermediary element, managing hydraulic pressure distribution and ensuring smooth torque transfer between rotating shafts. It sits directly adjacent to the main housing assembly, working in concert with the 4699101046 HOUSING to maintain structural integrity under extreme load conditions. The GK20 designation indicates its role in the gearshift control circuit, where it prevents premature wear by regulating oil flow to the clutch discs.

Symptoms of Failure

• Delayed gear engagement or slipping – When the 4699.003.017 wears, operators often report hesitation when shifting from neutral to drive, especially under load. This is a common long-tail search query for “ZF transmission slipping under load.”
• Hydraulic fluid leaks near the bell housing – Deterioration of the sealing surfaces on this part can cause oil seepage, frequently searched as “ZF GK20 oil leak repair.”
• Erratic shift quality or harsh engagement – A worn GK20 disrupts pressure modulation, leading to jarring shifts that are often described in service manuals as “ZF transmission harsh shifting.”
• Overheating of the transmission sump – Reduced hydraulic efficiency from a failing component forces the system to work harder, generating excess heat—a symptom often queried as “construction transmission overheating causes.”

Technical Specifications

Compatibility

This genuine part is engineered for use in ZF WG180, WG200, and WG210 series transmissions commonly found in wheel loaders, excavators, and telehandlers. It is also compatible with select ZF 4WG-200 and 6WG-200 variants used in construction machinery. For proper installation, ensure the mating surfaces of the 4699301109 HOUSING are clean and free of debris. The GK20 works in tandem with the 4699301017 BEARING COVER to maintain axial alignment, while the 4699301085 COVER provides environmental sealing against dust and moisture.

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