ZF 0730.106.660 SHIM | OEM Genuine Part

Overview

The ZF 0730.106.660 SHIM is a precision-engineered spacer component designed to establish exact axial clearances within heavy-duty ZF transmission assemblies. This OEM genuine part, identified by SKU 0730.106.660, is critical for maintaining proper gear mesh alignment and preload settings in the differential and axle housing sections of construction machinery transmissions. By compensating for manufacturing tolerances, this shim ensures that rotating assemblies—such as the 2093109029 DIFFERENTIAL and the 0750117075 TAPER ROLLER BEARING—operate with optimal contact patterns and minimal parasitic drag. Without the correct shim thickness, the entire driveline suffers from accelerated wear and reduced torque capacity.

Symptoms of Failure

• Excessive differential backlash: When the shim wears or compresses, you will notice a clunking noise during direction changes, often described as “ZF transmission gear lash” in service manuals.
• Premature bearing failure: A collapsed shim causes the 2093209094 DIFFERENTIAL to shift axially, overloading the taper roller bearings and producing a low-frequency growl under load.
• Oil contamination from metal debris: As the shim disintegrates, fine steel particles circulate through the transmission fluid, leading to filter clogging and valve body scoring.
• Intermittent gear slipping in WG-series transmissions: Incorrect shim stack height alters the preload on the 2093309078 DIFF.HOUSING, causing momentary loss of torque transfer under heavy excavation loads.

Technical Specifications

Compatibility

This shim is engineered for ZF heavy-duty powershift transmissions commonly used in wheel loaders, dozers, and graders. It is a direct fit for the following ZF models: WG180, WG200, WG210, and WG310 series. The part specifically adjusts the end-play of the differential carrier assembly inside the rear axle housing. When rebuilding these transmissions, always pair the 0730.106.660 shim with a new 0631100223 SPRING PIN and 0730300820 THRUST WASHER to restore factory tolerances.

Related Components

Frequently Asked Questions

Q: How do I verify the correct shim thickness for my ZF transmission?
A: Measure the axial clearance between the differential carrier and the housing using a dial indicator. The service manual for WG180/WG200 specifies a target preload of 0.05–0.15 mm. Stack the 0730.106.660 shim with additional shims until the turning torque of the differential reaches 2–4 Nm.

Q: Can I reuse this shim during a rebuild?
A: No. ZF OEM shims are designed for single-use installation. The material work-hardens under load, and reusing a compressed shim will lead to incorrect bearing preload and premature failure of the 0750117075 TAPER ROLLER BEARING.

Q: What tools are required to replace the 0730.106.660 shim?
A: You will need a bearing puller, dial indicator, torque wrench, and a micrometer. The shim sits behind the differential bearing cup, requiring removal of the 2093309078 DIFF.HOUSING for access.