ZF 0630.100.425 WASHER | OEM Genuine Part

Overview

The ZF 0630.100.425 WASHER is a precision-engineered OEM genuine component designed to maintain critical axial clearance and load distribution within ZF construction machinery transmissions. This hardened steel washer sits between the planetary gear set and the housing assembly, ensuring proper spacing to prevent metal-on-metal contact under high torque conditions. As part number 0630.100.425, it works in conjunction with the 4699101046 HOUSING and the 4699301109 HOUSING to secure the rotating assembly. Without this washer, gear alignment shifts, leading to accelerated wear on adjacent components like the 4699301017 BEARING COVER and the 4699301085 COVER.

Symptoms of Failure

• Transmission oil leaks near the housing joint — When the 0630.100.425 washer compresses or cracks, the seal between the housing and bearing cover fails, causing fluid seepage. This is a common “ZF washer failure leak” symptom.
• Gear slipping under load — A worn washer reduces axial preload, allowing the planetary gearset to shift slightly. Operators notice “transmission slipping in forward gear” during heavy excavation.
• Metallic grinding noise from the transmission case — As the washer thins, the gear stack contacts the housing directly. This “grinding sound from ZF transmission” often precedes catastrophic damage.
• Increased end-play in the output shaft — Excessive axial movement of the shaft indicates the washer has lost its original thickness, requiring immediate replacement.

Technical Specifications

Compatibility

This washer is engineered for ZF WG-series powershift transmissions commonly used in construction machinery. It is a direct fit for the WG180, WG200, and WG250 models. The 0630.100.425 also appears in select ZF 4WG-200 and 6WG-200 variants. Always verify the part number against your transmission’s serial plate before ordering.

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