ZF 0730.301.790 SHIM | OEM Genuine Part

Overview

The ZF 0730.301.790 SHIM is a precision-engineered OEM genuine component designed for critical axial clearance adjustment within heavy-duty ZF powershift transmissions. This thin, hardened steel spacer sits between the differential housing and bearing races, ensuring correct preload on the 0750117075: TAPER ROLLER BEARING assembly. By maintaining exact end-play tolerances, the 0730.301.790 prevents gear train misalignment and excessive wear on adjacent components. This SKU is commonly specified during rebuilds of construction machinery transmissions, where even 0.1mm of incorrect clearance can lead to premature failure.

Symptoms of Failure

• Transmission whine under load: A worn or collapsed shim allows the differential to shift, causing gear tooth contact pattern errors that produce a high-pitched whining noise during acceleration.
• Intermittent gear slipping: When the 0730.301.790 loses its original thickness, bearing preload drops, allowing the 5838109007: DIFFERENTIAL to float axially, which can cause clutch packs to momentarily lose engagement.
• Metallic debris in transmission fluid: A fractured shim releases hardened steel fragments into the oil circuit, often contaminating the 0631329086: SPRING PIN bores and valve body passages.
• Excessive differential end-play: Measurable axial movement at the output flange indicates the shim stack has compressed beyond specification, requiring immediate replacement of the 0730.301.790.

Technical Specifications

Compatibility

This shim is primarily specified for ZF WG180, WG200, and WG211 series powershift transmissions used in wheel loaders, graders, and heavy forklifts. It also appears in select ZF 4WG-310 and 6WG-260 models where differential preload adjustment is required. Always verify the shim stack height using a depth micrometer when replacing the 2095209019: DIFFERENTIAL assembly, as multiple shims may be stacked to achieve the factory specification.

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