ZF 4699.003.015 GK20 | OEM Genuine Part

Overview

The ZF 4699.003.015 GK20 is a critical OEM genuine component engineered for the internal hydraulic and mechanical control systems within ZF construction machinery transmissions. This part functions as a precision-machined valve or actuator component, regulating oil flow and pressure to ensure smooth gear engagement and clutch pack operation. As a genuine ZF part, the SKU 4699.003.015 guarantees exact fitment and material integrity, directly influencing the reliability of the transmission’s shift logic. It is typically located within the valve body or control housing assembly, working in tandem with the 4699101046 HOUSING and the 4699301109 HOUSING to create a sealed, pressurized circuit.

Symptoms of Failure

• Erratic or delayed gear engagement: When the 4699.003.015 wears, hydraulic pressure drops, causing noticeable hesitation or harsh shifts during operation.
• Internal transmission oil leaks: A degraded seal or cracked body on this part leads to fluid bypass, often visible as wet spots near the 4699301017 BEARING COVER or the 4699301085 COVER.
• Transmission overheating: Inefficient oil flow from a failing GK20 forces the system to work harder, raising operating temperatures beyond normal limits.
• Intermittent loss of drive: A worn part may cause sudden pressure drops, resulting in temporary power loss under load, especially in WG-series transmissions.

Technical Specifications

Compatibility

This OEM genuine part is designed for use in ZF WG-series transmissions commonly found in construction machinery, including wheel loaders, telehandlers, and graders. Based on its GK20 designation and hydraulic control function, it is compatible with the following ZF transmission models: WG180, WG200, WG210, and WG211. It also applies to select ErgoPower and Ecomat variants where the valve body configuration matches. Always verify the existing part number before installation.

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