Overview
The ZF 0730.107.851 SHIM is a precision-engineered OEM genuine component designed to maintain critical axial clearances within heavy-duty ZF powershift transmissions. This thin, hardened steel shim sits between the main shaft assembly and the gear train, compensating for manufacturing tolerances and preventing unwanted end-play. As a wear-and-adjustment item, the SKU 0730.107.851 is essential for restoring factory-specified preload when rebuilding or servicing construction machinery transmissions. Without this shim at the correct thickness, adjacent components like the 2094104412 MAIN SHAFT and the 2094304054 MAIN SHAFT can experience accelerated wear due to improper load distribution.
Symptoms of Failure
When the ZF 0730.107.851 shim wears down or is omitted during reassembly, several distinct operational issues emerge. First, you may notice excessive axial play in the main shaft, often felt as a clunking sensation during gear engagement. Second, low-frequency gear whine under load becomes audible as the gear stack loses its precise spacing. Third, intermittent gear slipping in forward ranges occurs because the shift system cannot fully engage the clutch packs. Finally, metal debris in the transmission oil filter indicates the shim has been ground down, allowing the 2094106010 SHIFT SYSTEM to contact rotating parts.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 0730.107.851 |
| Material | Case-hardened spring steel (C67S) |
| Inner Diameter | 42.0 mm |
| Outer Diameter | 68.0 mm |
| Thickness | 1.50 mm (selective fit) |
| Weight | 0.035 kg |
| Surface Finish | Ground, deburred edges |
| Hardness | HRC 48-52 |
Compatibility
This shim is a standard adjustment component across multiple ZF heavy-duty transmission families. It is commonly specified for the WG180, WG200, and WG210 series used in wheel loaders, graders, and dump trucks. The 0730.107.851 also appears in the 4WG-200 and 6WG-200 powershift models. When replacing this shim, always verify the end-play with a dial indicator and pair it with a new 2094206001 GEARSHIFT SHAFT to ensure the shift forks align correctly with the updated clearance.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2094104412 | MAIN SHAFT | Transfers torque from engine to gear train |
| 2094304054 | MAIN SHAFT | Secondary shaft for countershaft drive |
| 2094106010 | SHIFT SYSTEM | Hydraulic valve body for clutch modulation |
| 2094206001 | GEARSHIFT SHAFT | Mechanical link between shift lever and forks |
| 2094306053 | GEARSHIFT SHAFT | Alternate length shaft for WG200 models |
| 0630513070 | SNAP RING | Retains shim and bearings on shaft |
| 2094306019 | WASHER | Thrust washer for axial load distribution |
| 0732040444 | COMPRESSION SPRING | Returns shift rail to neutral position |
| 0732040728 | COMPRESSION SPRING | Higher rate spring for detent mechanism |
| 2093206001 | BUSH | Oil-impregnated bronze bushing for shift shaft |
Frequently Asked Questions
Q: Can I reuse the old 0730.107.851 shim during a rebuild?
A: No. ZF specifies that this shim must be replaced whenever the main shaft or gear train is disassembled. The shim deforms plastically during initial torqueing and will not maintain correct preload if reused.
Q: How do I select the correct shim thickness?
A: Measure the axial clearance with a dial indicator after installing the main shaft and bearings without the shim. Subtract the desired end-play (typically 0.05-0.15 mm) from the measured gap, then choose the shim thickness that matches that value. ZF offers this shim in 0.10 mm increments.
Q: Will this shim fit the ZF 4WG-310 transmission?
A: No. The 4WG-310 uses a larger diameter shim (part number 0730.107.862). Always verify your transmission model tag before ordering. The 0730.107.851 is limited to WG180, WG200, and WG210 series.
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