ZF 0631.100.210 WOODRUFF KEY | OEM Genuine Part

Overview

The ZF 0631.100.210 WOODRUFF KEY is a precision-machined OEM genuine component designed to secure rotating elements within ZF construction machinery transmissions. This small but critical fastener fits into a keyway to lock gears, pulleys, or shafts in place, preventing rotational slippage under high torque loads. Specifically, this part is positioned in the drivetrain assembly to ensure positive engagement between the shaft and the hub of a gear or sprocket. The SKU 0631.100.210 is engineered to exact OEM tolerances, guaranteeing a snug fit that maintains alignment and power transfer efficiency in heavy-duty applications.

Symptoms of Failure

When the ZF 0631.100.210 WOODRUFF KEY wears out or shears, operators may notice several distinct failure modes. Transmission gear slipping under load is a primary indicator, as the key can no longer hold the gear securely to the shaft. Unusual knocking or clunking noises from the transmission housing often accompany this slippage, particularly during acceleration or deceleration. Vibration in the driveline may occur as the loose component creates imbalance. In severe cases, complete loss of power to the wheels can happen if the key fractures entirely, leaving the shaft spinning freely inside the gear hub.

Technical Specifications

Compatibility

This Woodruff Key is a standard fitment across several ZF transmission models commonly used in construction machinery. It is compatible with the ZF WG180, WG200, and WG210 series transmissions. Additionally, it is found in the ZF 4WG-200 and 4WG-210 powershift transmissions. For precise installation, always verify the keyway dimensions on your specific shaft and hub assembly. When servicing these transmissions, it is common to replace this key alongside the 4699025066: GP25 and the 4699101071: HOUSING to ensure all drivetrain interfaces are secure.

During a full rebuild, technicians often inspect the 4699102106: INPUT shaft and the 4699103104: OUTPUT shaft for wear at the keyway location. Replacing the Woodruff Key without addressing worn shafts or housings can lead to premature failure. Always pair this part with fresh sealing components like the 0634801038: SEALING RING to prevent contamination.

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