ZF 0730.302.747 SPACER BUSH | OEM Genuine Part

Overview

The ZF 0730.302.747 SPACER BUSH is a precision-machined OEM genuine component designed to maintain critical axial clearances within the differential and final drive assembly of heavy-duty construction machinery transmissions. This spacer bush ensures correct gear mesh alignment and load distribution between rotating elements, preventing metal-to-metal contact that leads to premature wear. As an OEM genuine part, the SKU 0730.302.747 guarantees exact dimensional tolerances and material hardness specified by ZF for long service intervals. It sits directly between the differential housing and the crown wheel assembly, acting as a sacrificial wear surface that protects more expensive drivetrain components.

Symptoms of Failure

• Abnormal drivetrain noise during turns: A worn 0730.302.747 spacer bush allows excessive lateral play in the differential, producing a distinct grinding or clunking sound when the machine turns under load.
• Oil contamination with metallic particles: As the bush wears, fine steel shavings enter the transmission oil, visible during routine oil changes or filter inspections, indicating internal component degradation.
• Intermittent gear slipping under heavy load: Loss of proper axial preload from a collapsed spacer bush can cause the crown wheel to shift, resulting in momentary loss of torque transfer during excavation or grading operations.
• Vibration in the driveline at low speeds: Uneven wear on the bush creates rotational imbalance, felt as a low-frequency vibration through the chassis when operating below 10 km/h.

Technical Specifications

Compatibility

This spacer bush is engineered for ZF WG180, WG200, and WG250 series powershift transmissions commonly found in wheel loaders, graders, and telehandlers. It is a direct replacement for the original factory-installed bush in differential assemblies for models including ZF 4WG180, 4WG200, 4WG250, and 6WG200. The 0730.302.747 also fits select ZF APL-300 and APL-400 axle configurations used in construction machinery from manufacturers such as Liebherr, Volvo, and Caterpillar. Always verify your transmission serial number against ZF parts catalogs before ordering.

When replacing this spacer bush, it is critical to inspect and often replace associated components in the same assembly. The 2099109002 DIFFERENTIAL and 2099364014 CROWN WHEEL must be checked for wear patterns, as a failed bush can damage their mating surfaces. Additionally, the 2099209001 DIFFERENTIAL and 2098309010 DIFFERENTIAL HOUSING should be examined for scoring or distortion that could compromise the new bush’s fitment.

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