Overview
The ZF 0730.111.812 SHIM is a precision-engineered spacer component designed to establish critical axial clearances within heavy-duty ZF transmissions. This OEM genuine part, identified by SKU 0730.111.812, is installed between gear sets and bearing assemblies to absorb manufacturing tolerances and maintain optimal gear mesh patterns. By providing a precise adjustment layer, this shim prevents metal-to-metal contact and ensures consistent load distribution across the drivetrain. It is commonly found in the differential housing assembly of construction machinery transmissions, where it works in conjunction with the 2093309078: DIFF.HOUSING to secure the final drive alignment.
Symptoms of Failure
When the ZF 0730.111.812 shim wears or collapses beyond specification, operators will notice distinct mechanical issues. Excessive differential backlash during load reversal is a primary indicator, often felt as a clunking sensation when shifting between forward and reverse. Premature bearing noise from the axle housing occurs as the 0750117075: TAPER ROLLER BEARING loses its preload, creating a rhythmic whine under acceleration. Uneven tire wear patterns on construction equipment suggest the shim has allowed the differential assembly to drift out of alignment. Finally, intermittent gear slipping under heavy load may develop, as the compromised clearance prevents proper engagement between the 2093109029: DIFFERENTIAL components.
Technical Specifications
| Specification | Detail |
|---|---|
| OEM Part Number | 0730.111.812 |
| Material | Case-hardened spring steel (C67S) |
| Outer Diameter | 112.0 mm |
| Inner Diameter | 68.5 mm |
| Thickness | 1.25 mm (selective fit) |
| Weight | 0.085 kg |
| Surface Finish | Ground, deburred edges |
| Hardness | HRC 45-50 |
Compatibility
This shim is engineered for ZF heavy-duty powershift transmissions commonly used in wheel loaders, graders, and excavators. It is a direct fit for the ZF WG180, WG200, and WG211 series. The part also supports the ZF 4WG-200 and 5WG-200 variants. When rebuilding the differential section, always pair this shim with the 2093209094: DIFFERENTIAL assembly to ensure correct preload on the taper roller bearings.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2093109029 | DIFFERENTIAL | Distributes torque to axle shafts |
| 0750117075 | TAPER ROLLER BEARING | Supports rotating differential gears |
| 2093209094 | DIFFERENTIAL | Secondary torque distribution unit |
| 2093309078 | DIFF.HOUSING | Encloses differential gear set |
| 0631100223 | SPRING PIN | Secures shim and gear alignment |
| 0730300820 | THRUST WASHER | Reduces axial friction on gears |
| 4482360002 | AXLE BEVEL GEAR | Transfers power to wheel hubs |
| 2097309085 | DIFFERENTIAL AXLE | Connects differential to final drive |
| 5838300811 | THRUST WASHER | Controls end-play in gear clusters |
| 4482360001 | DIFFERENTIAL BEVEL GEAR | Primary gear for speed differentiation |
Frequently Asked Questions
Q: How do I know if the 0730.111.812 shim needs replacement?
A: Measure the differential end-play with a dial indicator. If clearance exceeds 0.15 mm, the shim has likely compressed beyond its elastic limit and must be replaced to prevent bearing damage.
Q: Can I reuse this shim during a transmission rebuild?
A: No. ZF specifies that selective shims like the 0730.111.812 must always be replaced with new parts. Reusing a worn shim will result in incorrect preload and premature failure of the taper roller bearings.
Q: Is this shim compatible with the ZF 4WG-310 transmission?
A: While primarily designed for the WG180/200 series, it may fit the 4WG-310 if the differential housing uses the same bearing bore dimensions. Always verify the inner diameter of 68.5 mm against your housing before installation.
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