Overview
The ZF 0730.107.850 SHIM is a precision-engineered OEM genuine component designed to maintain critical axial clearances within ZF heavy-duty powershift transmissions. This thin, hardened steel spacer sits between the main shaft assembly and adjacent gear clusters, ensuring correct preload and alignment under extreme torque loads. The SKU 0730.107.850 is specifically calibrated to compensate for manufacturing tolerances, preventing unwanted shaft end-play that can lead to premature bearing failure. In construction machinery applications, this shim works in concert with the 2094104412 MAIN SHAFT and the 2094304054 MAIN SHAFT to stabilize the rotating assembly, while the 2094106010 SHIFT SYSTEM and 2094206001 GEARSHIFT SHAFT rely on its precise thickness for consistent engagement.
Symptoms of Failure
- Transmission oil seepage at shaft seals: When the 0730.107.850 shim wears or compresses beyond tolerance, the main shaft shifts axially, distorting seal lips and causing slow oil leaks around the output flange.
- Intermittent gear slipping under load: Worn clearance allows the gear train to lose mesh depth, resulting in momentary power loss during excavation or grading operations.
- Audible clunking during direction changes: Excessive end-play from a collapsed shim produces a metallic knock when shifting from forward to reverse, particularly in ZF WG-series transmissions.
- Vibration at specific RPM ranges: Incorrect shim thickness alters the natural frequency of the shaft assembly, causing resonance that accelerates wear on synchronizers and bearings.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0730.107.850 |
| Material | Case-hardened spring steel (DIN 1.7131) |
| Outer Diameter | 85.0 mm |
| Inner Diameter | 62.5 mm |
| Thickness | 0.85 mm |
| Weight | 28 grams |
| OEM Reference | ZF 0730.107.850 |
| Hardness | HRC 45-50 |
Compatibility
This shim is engineered for ZF powershift transmissions commonly found in wheel loaders, dozers, and graders. It is a direct fit for the WG180, WG200, and WG210 series, where it is used in the main shaft preload stack. The 0730.107.850 also applies to certain 4WG-200 and 6WG-200 variants produced between 2005 and 2018. For verification, always cross-reference the existing shim thickness with a micrometer before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2094104412 | MAIN SHAFT | Transfers torque from engine to gear cluster |
| 2094304054 | MAIN SHAFT | Secondary shaft for countershaft drive |
| 2094106010 | SHIFT SYSTEM | Hydraulic actuator assembly for clutch packs |
| 2094206001 | GEARSHIFT SHAFT | Mechanical linkage for gear selection |
| 2094306053 | GEARSHIFT SHAFT | Alternate shaft for synchronized engagement |
| 0630513070 | SNAP RING | Retains shim and bearings on shaft |
| 2094306019 | WASHER | Thrust washer for axial load distribution |
| 0732040444 | COMPRESSION SPRING | Preload spring for shift rail detent |
| 0732040728 | COMPRESSION SPRING | Heavy-duty spring for clutch piston return |
| 2093206001 | BUSH | Bronze bushing for shaft support |
Frequently Asked Questions
Q: Can I reuse the 0730.107.850 shim during a rebuild?
A: No. ZF OEM shims are single-use components. The hardened steel undergoes plastic deformation during initial torque-down, and reusing it will result in incorrect clearance and rapid bearing wear.
Q: How do I measure the correct shim thickness for my WG200 transmission?
A: Install the main shaft without the shim, measure the axial gap with a dial indicator, then select the 0730.107.850 (0.85 mm) or adjacent thicknesses (0.80 mm, 0.90 mm) to achieve the factory preload specification of 0.05–0.15 mm end-play.
Q: Does this shim fit the ZF 4WG-310 model?
A: No. The 4WG-310 uses a larger 95 mm outer diameter shim (part 0730.109.250). Always verify by comparing the inner diameter of the bearing race against the shim OD.
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Phone: +86 158 2286 3467 |
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