Overview
The ZF 0730.109.392 SHIM is a precision-engineered spacer component designed to maintain critical axial clearances within heavy-duty ZF transmission assemblies. Positioned between the differential housing and bearing races, this OEM genuine part ensures correct preload and alignment of rotating elements. The SKU 0730.109.392 is commonly specified for construction machinery transmissions where load distribution and gear mesh accuracy are paramount. When installed alongside a DIFFERENTIAL HOUSING, this shim prevents metal-to-metal contact and compensates for thermal expansion during operation.
Symptoms of Failure
- Excessive drivetrain backlash – Worn shims cause increased gear lash, producing a clunking noise during acceleration or deceleration in construction loaders.
- Premature bearing wear – Incorrect shim thickness leads to improper preload on the TAPER ROLLER BEARING, resulting in rough rotation and eventual bearing seizure.
- Oil seepage at differential seals – Axial movement from a collapsed shim forces lubricant past seals, visible as drips near the axle housing.
- Intermittent gear slipping – When the shim fails, the DIFFERENTIAL assembly shifts position, causing momentary loss of torque transfer under heavy loads.
Technical Specifications
| Part Number | 0730.109.392 |
| Material | Case-hardened steel (C45E +HC) |
| Outer Diameter | 72.0 mm |
| Inner Diameter | 48.5 mm |
| Thickness | 1.25 mm (selective fit) |
| Weight | 0.018 kg |
| OEM Reference | ZF 0730.109.392 |
| Surface Finish | Ground, Ra ≤ 0.8 µm |
Compatibility
This shim is engineered for ZF heavy-duty powershift transmissions used in construction machinery. It is a direct fit for the WG180, WG200, and WG210 series, as well as the 4WG-200 and 6WG-200 variants. The part also applies to ZF differential assemblies in wheel loaders and graders. For complete axle rebuilds, pair this shim with a DIFFERENTIAL unit to restore factory tolerances.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109012 | DIFFERENTIAL | Distributes torque between drive wheels |
| 0750117075 | TAPER ROLLER BEARING | Supports axial and radial loads on shafts |
| 2093209023 | DIFFERENTIAL | Secondary differential for tandem axles |
| 5838300626 | DIFFERENTIAL HOUSING | Encloses differential gears and bearings |
| 0631329088 | SPRING PIN | Secures shim and gear alignment |
| 5838300811 | THRUST WASHER | Reduces friction between rotating surfaces |
| 5838300721 | AXLE BEVEL GEAR | Transfers power to axle shafts |
| 5838300633 | AXLE | Transmits rotational force to wheels |
| 5838300753 | THRUST WASHER | Controls axial play in differential |
| 5838300818 | THRUST WASHER | Provides wear surface for gear thrust |
Frequently Asked Questions
Q: How do I verify the correct shim thickness for my ZF transmission?
A: Measure the axial clearance between the bearing race and differential housing using a dial indicator. The 0730.109.392 shim is 1.25 mm thick; stack multiple shims if needed to achieve 0.05–0.15 mm preload.
Q: Can I reuse this shim after disassembly?
A: No. ZF OEM shims are single-use components because they deform slightly during initial torque application. Always replace with a new 0730.109.392 shim to maintain proper bearing preload.
Q: Does this shim fit both WG180 and WG200 transmissions?
A: Yes. The 0730.109.392 is a common shim across the WG180, WG200, and WG210 families. However, always confirm by checking the inner diameter (48.5 mm) against your differential shaft.
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