ZF 0730.302.743 SPACER BUSH | OEM Genuine Part

Overview

The ZF 0730.302.743 SPACER BUSH is a precision-engineered OEM genuine component designed to maintain critical axial clearances within the differential assembly of heavy-duty construction machinery transmissions. This hardened steel bushing acts as a load-bearing spacer, ensuring that rotating elements such as the crown wheel and differential gears remain correctly aligned under extreme torque loads. The SKU 0730.302.743 is specifically positioned between the differential housing and the bearing race, preventing metal-on-metal contact that can lead to premature wear. When paired with a new 2099109002: DIFFERENTIAL or a 2099364014: CROWN WHEEL, this spacer bush guarantees the precise shimming required for optimal gear mesh patterns and long service life.

Symptoms of Failure

• Abnormal differential housing noise during turns: A worn 0730.302.743 spacer bush allows excessive lateral play in the 2098309010: DIFFERENTIAL HOUSING, producing a distinct clunking or grinding sound when the machine maneuvers under load.
• Premature crown wheel tooth wear: As the spacer bush loses its original thickness, the 2099209001: DIFFERENTIAL shifts out of alignment, causing uneven contact patterns on the crown wheel teeth and accelerated pitting.
• Oil contamination with metallic debris: A collapsing spacer bush generates fine steel particles that circulate through the transmission fluid, often visible during routine oil sampling or when draining the axle housing.
• Intermittent drive engagement slippage: When the spacer bush fails catastrophically, the differential assembly can shift axially, causing temporary loss of torque transfer to the wheels under heavy load.

Technical Specifications

Compatibility

This OEM genuine spacer bush is engineered for use in ZF WG180, WG200, and WG250 series transmissions commonly found in wheel loaders, telehandlers, and graders. It is also compatible with select ZF ECCOMIX and ERGOPOWER drivelines used in concrete mixers and heavy-duty trucks. The 0730.302.743 part directly interfaces with the differential carrier assembly and is frequently replaced alongside the 2098309009: DIFFERENTIAL HOUSING or the 2098309031: AXLE BEVEL GEAR. For machines operating in high-load applications like mining or demolition, always verify the spacer bush thickness against the original shim stack to maintain factory backlash specifications.

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