ZF 0730.302.750 SPACER BUSH | OEM Genuine Part

Overview

The ZF 0730.302.750 SPACER BUSH is a precision-machined component engineered to maintain critical axial clearances within the differential assembly of heavy-duty construction machinery transmissions. This OEM genuine part ensures correct positioning of rotating elements, preventing metal-on-metal contact that can lead to premature gear wear. The SKU 0730.302.750 specifically functions as a load-bearing spacer between the differential housing and the crown wheel assembly, absorbing thrust loads during high-torque operations. In ZF drivetrains, this spacer bush sits directly adjacent to the 2099109002: DIFFERENTIAL and the 2099364014: CROWN WHEEL, forming a critical interface that maintains gear mesh alignment under extreme stress.

Symptoms of Failure

When the 0730.302.750 spacer bush deteriorates, operators often notice intermittent driveline clunking during load reversals—a clear indicator of lost axial preload. Another common failure symptom is premature crown wheel tooth wear accompanied by fine metallic particles in the transmission oil, signaling that the spacer has collapsed and allowed gear misalignment. You may also experience erratic differential locking behavior as the worn bush fails to maintain proper clearance for the 2099209001: DIFFERENTIAL assembly. Finally, persistent oil seepage from the axle housing seals can occur when spacer wear alters the position of the 2098309010: DIFFERENTIAL HOUSING, compromising seal contact surfaces.

Technical Specifications

Compatibility

This spacer bush is primarily designed for ZF WG180, WG200, and WG250 series transmissions commonly found in wheel loaders, graders, and telescopic handlers. It also fits select ZF HP and EC series axles used in construction machinery from 2010 onward. The 0730.302.750 is a direct replacement for earlier ZF part numbers 0730.302.749 and 0730.302.748. Always verify compatibility with your specific transmission serial number before installation, particularly when paired with updated 2098309009: DIFFERENTIAL HOUSING variants.

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