ZF 4699.803.030 GK20 | OEM Genuine Part

Overview

The ZF 4699.803.030 GK20 is a precision-engineered OEM genuine component designed for the valve body or hydraulic control assembly within heavy-duty ZF powershift transmissions. This part, identified by SKU 4699.803.030, functions as a critical sealing and guide element, ensuring proper oil flow and pressure regulation during gear engagement. It sits directly within the transmission housing, working in tandem with the 4699101046 HOUSING to maintain structural integrity under high torque loads. Without this component, the transmission cannot maintain consistent hydraulic pressure, leading to operational inefficiencies in construction machinery.

Symptoms of Failure

When the ZF 4699.803.030 GK20 wears out, operators typically notice these specific failure modes:

• Hydraulic oil seepage around the valve body interface, often mistaken for a simple gasket failure.
• Erratic gear engagement or delayed shifting under load, particularly when transitioning from forward to reverse.
• Increased transmission noise (whining or clattering) due to pressure loss in the control circuit.
• Overheating of the transmission fluid caused by internal leakage, reducing overall efficiency.

These symptoms are common search queries for technicians troubleshooting ZF WG-series transmissions in excavators and wheel loaders.

Technical Specifications

Compatibility

This part is engineered for use in ZF powershift transmissions commonly found in construction machinery. It is directly compatible with the following ZF transmission models:

• ZF WG180
• ZF WG200
• ZF WG210
• ZF 4WG-200

Installation requires careful alignment with the 4699301109 HOUSING and the 4699301017 BEARING COVER to prevent premature wear. Always pair this component with a new 4699301085 COVER for optimal sealing performance.

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