ZF 4699.803.068 GK20 II | OEM Genuine Part

Overview

The ZF 4699.803.068 GK20 II is a precision-engineered gearshift assembly designed for heavy-duty construction machinery transmissions. This OEM genuine part functions as the primary shift control mechanism within the transmission housing, managing gear engagement and disengagement during operation. The SKU 4699.803.068 sits directly in the valve body assembly, where it interfaces with hydraulic circuits to regulate clutch pack activation. When paired with the 4699003053 GK20 II, this component ensures synchronized gear changes under high torque loads. Its robust construction withstands the extreme pressures found in ZF WG-series transmissions, making it critical for maintaining operational efficiency in excavators and loaders.

Symptoms of Failure

• Erratic gear engagement: When the 4699.803.068 wears, operators experience delayed or harsh shifting between forward and reverse gears, often accompanied by grinding noises during low-speed maneuvers.
• Hydraulic fluid seepage: Deteriorated seals around the shift assembly cause oil leaks near the transmission bell housing, leaving visible puddles under parked equipment.
• Intermittent neutral lockout: A failing GK20 II may prevent the transmission from holding neutral, causing unintended creep in stationary machinery.
• Reduced shift pressure: Worn internal spools lead to low hydraulic pressure readings, resulting in clutch slippage under load and overheating during extended operation.

Technical Specifications

Compatibility

This genuine ZF part is engineered for the following transmission models commonly found in construction machinery: WG180, WG200, and WG210 series. It also applies to the 4WG-180 and 4WG-200 variants used in wheel loaders and dozers. The 4699.803.068 interfaces directly with the 4699101109 HOUSING and requires proper alignment with the 4699102144 INPUT shaft assembly. For output-side integration, the 4699103030 OUTPUT component must be in good condition to prevent premature wear.

Related Components