ZF 0730.300.686 SHIM | OEM Genuine Part

Overview

The ZF 0730.300.686 SHIM is a precision-engineered OEM genuine spacer component designed for critical axial clearance control within heavy-duty ZF construction machinery transmissions. This shim, identified by SKU 0730.300.686, sits between the transmission housing and the bearing race or gear assembly, ensuring correct preload and alignment of rotating elements. By maintaining exact tolerances, it prevents metal-to-metal contact and compensates for thermal expansion during operation. This part is frequently replaced alongside the 4699101124 HOUSING and the 4699301209 HOUSING during a full transmission overhaul to restore factory-spec endplay.

Symptoms of Failure

• Excessive axial gear play: A worn or collapsed shim allows the gear cluster to shift laterally, causing harsh engagement and a “clunking” noise when shifting between forward and reverse.
• Premature bearing failure: Incorrect shim thickness leads to bearing overload, resulting in a high-pitched whining sound from the transmission housing during acceleration.
• Oil contamination from metal debris: As the shim degrades, microscopic metal particles enter the hydraulic circuit, clogging valve bodies and reducing clutch pack pressure.
• Intermittent gear slipping under load: Loss of axial preload allows the input shaft to drift, causing momentary power loss when the machine is under heavy digging or lifting stress.

Technical Specifications

Compatibility

This shim is a standard component in ZF’s WG-series powershift transmissions commonly used in wheel loaders, graders, and telehandlers. It is directly compatible with the following ZF models: WG180, WG200, WG210, and WG250. It also fits select variants of the 4WG200 and 6WG200 series. When replacing this shim, always inspect the mating 4699301015 HOUSING COVER and the 4699301085 COVER for wear or distortion, as these components work together to maintain the correct stack height.

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