ZF 0730.304.070 SHIM | OEM Genuine Part

Overview

The ZF 0730.304.070 SHIM is a precision-engineered OEM genuine component designed to establish critical axial clearances within ZF heavy-duty transmissions. Positioned between the differential housing and bearing assemblies, this shim compensates for manufacturing tolerances and thermal expansion, ensuring optimal gear mesh and load distribution. The SKU 0730.304.070 is commonly utilized in construction machinery transmissions, where maintaining exact end-play is essential for preventing premature wear on adjacent rotating assemblies. When installed alongside a 5838109012: DIFFERENTIAL, this shim directly influences the preload on the differential carrier, directly affecting torque transfer efficiency and drivetrain longevity.

Symptoms of Failure

• Excessive drivetrain backlash: A worn or incorrectly sized 0730.304.070 shim allows axial play in the differential assembly, causing a noticeable “clunk” when shifting between forward and reverse gears.
• Premature bearing noise: Insufficient shim thickness leads to loose preload on the 0750117075: TAPER ROLLER BEARING, resulting in a low-frequency growl or whine during loaded operation.
• Oil contamination from metal debris: As the shim degrades, it can fracture, releasing fine metallic particles into the transmission fluid. This often accompanies gear slipping under heavy load.
• Uneven tire wear on drive axles: In construction machinery, a failing shim disrupts the differential lock-up sequence, causing one wheel to spin faster than the other during low-traction conditions.

Technical Specifications

Compatibility

This shim is engineered for ZF WG-series powershift transmissions commonly found in wheel loaders, graders, and excavators. It is a direct fit for the WG180, WG200, and WG211 series, where it sits between the differential housing and the taper roller bearing race. In these assemblies, the 0730.304.070 works in concert with the 2093209023: DIFFERENTIAL to maintain proper gear contact patterns. It is also compatible with certain ZF 4WG-200 and 5WG-300 torque converter transmissions used in mining equipment. Always verify the shim stack height against the 5838300626: DIFFERENTIAL HOUSING mating surface before installation.

Related Components

Frequently Asked Questions

Q: How do I know if the 0730.304.070 shim is the correct thickness for my transmission?
A: The shim thickness must be selected based on the measured end-play between the differential housing and bearing race. Use a dial indicator to measure axial clearance with the differential installed; the target preload is typically 0.05-0.15 mm for WG-series transmissions. If the clearance exceeds 0.20 mm, install this 0.70 mm shim to restore proper preload.

Q: Can I reuse this shim during a rebuild?
A: No. The 0730.304.070 is a crush-type shim that deforms slightly during initial torque application. Reusing it will result in inconsistent preload and accelerated bearing wear. Always install a new OEM shim when replacing the taper roller bearing or differential assembly.

Q: Does this shim work with the 5838300626 differential housing from older ZF models?
A: Yes, the 0730.304.070 is dimensionally identical to the shim used in ZF 4WG-200 transmissions manufactured after 1998. However, verify the housing bore diameter (120.0 mm) matches your unit, as early WG180 housings used a 118.5 mm bore.