Overview
The ZF 0730.109.574 SHIM is a precision-engineered OEM genuine part designed to establish critical axial clearances within heavy-duty ZF powershift transmissions. This shim sits between the main shaft assembly and the gearshift mechanism, compensating for manufacturing tolerances to ensure optimal gear engagement and load distribution. By maintaining exacting end-play specifications, the 0730.109.574 prevents premature wear on adjacent rotating components. This part is commonly specified for rebuilds and overhauls in construction machinery transmissions, where even micron-level misalignment can lead to drivetrain inefficiency. The SKU 0730.109.574 is often replaced in tandem with the 2094104412: MAIN SHAFT and the 2094304054: MAIN SHAFT during a full transmission rebuild.
Symptoms of Failure
When the ZF 0730.109.574 shim wears or deforms, several distinct failure modes emerge. First, you may notice excessive axial play in the main shaft, which manifests as a clunking noise when shifting between forward and reverse. Second, erratic gear engagement or gear slipping under load occurs because the shift system cannot maintain proper fork-to-collar alignment. Third, intermittent oil leaks from the transmission housing can develop as shaft movement distorts seal surfaces. Finally, hard shifting or grinding during gear changes becomes common, particularly in WG-series transmissions operating under heavy construction loads.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number / SKU | 0730.109.574 |
| Material | Case-hardened steel (DIN 1.7131) |
| Thickness | 2.50 mm (nominal) |
| Outer Diameter | 68.0 mm |
| Inner Diameter | 42.0 mm |
| Weight | 0.045 kg |
| OEM Reference | ZF 0730.109.574 |
| Hardness | 58-62 HRC |
Compatibility
This shim is engineered for ZF powershift transmissions commonly used in construction machinery. It is a direct fit for the WG180, WG200, and WG250 series gearboxes. Additionally, it is compatible with select 4WG-200 and 6WG-250 variants found in wheel loaders, dozers, and graders. Always verify the shim stack height during assembly; pairing this part with a new 2094106010: SHIFT SYSTEM and 2094206001: GEARSHIFT SHAFT ensures correct end-play tolerances.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2094104412 | MAIN SHAFT | Transfers torque from clutch packs to output gearset |
| 2094304054 | MAIN SHAFT | Alternate shaft variant for high-torque applications |
| 2094106010 | SHIFT SYSTEM | Controls hydraulic actuation of gear selection forks |
| 2094206001 | GEARSHIFT SHAFT | Transmits shift fork movement to synchronizer assemblies |
| 2094306053 | GEARSHIFT SHAFT | Replacement shaft for WG200 series shift rails |
| 0630513070 | SNAP RING | Secures shaft bearings in housing bore |
| 2094306019 | WASHER | Provides thrust surface for gearshift shaft end-play |
| 0732040444 | COMPRESSION SPRING | Returns shift fork to neutral position |
| 0732040728 | COMPRESSION SPRING | Heavy-duty spring for high-cycle shift applications |
| 2093206001 | BUSH | Guides shift shaft through transmission housing |
Frequently Asked Questions
Q: Can I reuse the old shim 0730.109.574 during a rebuild?
No. ZF OEM shims are single-use components. The case-hardened surface work-hardens during service, and reusing a worn shim will result in incorrect end-play, leading to rapid gear wear and shift fork damage.
Q: How do I measure the correct shim thickness for my WG200 transmission?
Install the main shaft and gearshift shaft without the shim, then measure the axial gap using a depth micrometer. Select the shim thickness that brings end-play to 0.05-0.15 mm. Always use a new 0630513070: SNAP RING to lock the assembly.
Q: Does this shim fit ZF 4WG-200 transmissions from 1998-2005?
Yes. The 0730.109.574 is backward-compatible with all 4WG-200 and 6WG-250 series transmissions that use a 42 mm inner diameter main shaft. Verify your transmission serial number against the ZF parts catalog for absolute confirmation.
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