Overview
The ZF 0730.108.198 SHIM is a precision-engineered OEM genuine spacer component designed to establish critical axial clearances within heavy-duty ZF transmission assemblies. Positioned between the differential housing and bearing races, this shim compensates for manufacturing tolerances and wear, ensuring optimal gear mesh patterns and load distribution. The SKU 0730.108.198 is specifically utilized in construction machinery drivelines, where it maintains the preload on bearings and prevents unwanted movement of the differential assembly. Without this shim, the transmission’s internal geometry shifts, leading to accelerated component fatigue and premature failure of adjacent parts like the 2099109002 DIFFERENTIAL or the 2099364014 CROWN WHEEL.
Symptoms of Failure
When the ZF 0730.108.198 shim wears, collapses, or is incorrectly selected during rebuild, several distinct failure modes emerge. Transmission gear slipping under load occurs because the lost clearance allows the differential to shift, disengaging the crown wheel from the pinion. Low-frequency whining or howling from the axle housing indicates improper backlash between the 2099209001 DIFFERENTIAL and the ring gear. Metallic debris in the transmission oil filter signals that the shim has fractured, releasing hardened steel particles into the lubrication circuit. Intermittent driveline clunking during direction changes points to excessive axial play in the differential housing, directly traceable to a worn or missing shim.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 0730.108.198 |
| Material | Hardened spring steel (C67S or equivalent) |
| Thickness | 0.50 mm (nominal, select-fit range 0.45–0.55 mm) |
| Outer Diameter | 108 mm |
| Inner Diameter | 82 mm |
| Weight | 0.042 kg |
| Surface Finish | Ground, Ra ≤ 0.8 µm |
| OEM Reference | ZF 0730.108.198 |
Compatibility
This shim is a standard component in ZF’s WG series powershift transmissions commonly installed in construction machinery. It is directly compatible with the ZF WG180, WG200, and WG210 transmission models. Additionally, it appears in certain ZF 4WG-200 and 6WG-200 variants used in wheel loaders, graders, and dump trucks. The shim seats between the 2098309010 DIFFERENTIAL HOUSING and the bearing cup, making it essential for any rebuild involving the differential carrier assembly. Always verify the required thickness using the factory shim selection chart when replacing this part.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2099109002 | DIFFERENTIAL | Distributes torque between axle shafts |
| 2099364014 | CROWN WHEEL | Drives the differential assembly |
| 2099209001 | DIFFERENTIAL | Alternate differential variant for WG series |
| 2098309010 | DIFFERENTIAL HOUSING | Encloses differential gears and shims |
| 2098309009 | DIFFERENTIAL HOUSING | Housing variant for heavy-duty applications |
| 2098309031 | AXLE BEVEL GEAR | Transfers power to wheel hubs |
| 2098309030 | AXLE BEVEL GEAR | Matching bevel gear for axle output |
| 2098309032 | DIFFERENTIAL BEVEL GEAR | Internal gear for differential action |
| 12883200682 | THRUST WASHER | Reduces axial friction on gear faces |
| 0635332059 | BALL BEARING | Supports rotating shaft within housing |
