Overview
The ZF 0730.109.408 SHIM is a precision-engineered spacer component designed to establish critical axial clearances within heavy-duty ZF transmissions. Positioned between gear sets and bearing assemblies, this OEM genuine shim ensures that preload tolerances remain within factory specifications, preventing unwanted gear movement and reducing internal stress. The SKU 0730.109.408 is commonly found in the differential housing area, where it works alongside the 5838300626: DIFFERENTIAL HOUSING to maintain proper alignment of rotating components. Without this shim, the entire gear train can shift out of position, leading to accelerated wear and reduced transmission efficiency.
Symptoms of Failure
- Excessive gear backlash and clunking noises – When the shim compresses or wears, axial play increases, causing a distinct “clunk” during gear engagement or direction changes.
- Oil leaks around the differential housing seal – A worn shim alters the housing geometry, putting uneven pressure on seals and gaskets, leading to visible oil seepage.
- Intermittent gear slipping under load – As clearance grows, the transmission may momentarily lose torque transfer, especially when climbing or hauling heavy loads.
- Vibration at highway speeds – Misaligned shafts caused by a collapsed shim create harmonic vibrations that worsen as RPM increases.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number / SKU | 0730.109.408 |
| Material | Hardened spring steel (C67S) |
| Thickness | 1.50 mm (±0.02 mm) |
| Outer Diameter | 85.0 mm |
| Inner Diameter | 62.0 mm |
| Weight | 0.042 kg |
| OEM Reference | ZF 0730.109.408 |
| Surface Finish | Ground, deburred edges |
Compatibility
This shim is engineered for ZF heavy-duty powershift transmissions commonly used in construction machinery. It is a direct fit for the WG180, WG200, and WG210 series, as well as the 4WG-200 and 5WG-200 variants. In these assemblies, the 0730.109.408 shim is installed adjacent to the 0750117075: TAPER ROLLER BEARING to set the correct bearing preload. It also interfaces with the 5838109012: DIFFERENTIAL and the 2093209023: DIFFERENTIAL to ensure concentric alignment of the ring gear and pinion set.
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 multi-axle drive |
| 5838300626 | DIFFERENTIAL HOUSING | Encloses and supports differential gears |
| 0631329088 | SPRING PIN | Secures shims and gears in position |
| 5838300811 | THRUST WASHER | Reduces friction between rotating surfaces |
| 5838300721 | AXLE BEVEL GEAR | Transfers power at a right angle |
| 5838300633 | AXLE | Transmits rotational force to wheels |
| 5838300753 | THRUST WASHER | Controls end-play in gear clusters |
| 5838300818 | THRUST WASHER | Provides axial support for planetary gears |
Frequently Asked Questions
Q: How do I know if the 0730.109.408 shim needs replacement?
A: Measure the axial play in the differential housing. If clearance exceeds 0.15 mm with the bearing seated, the shim has likely compressed beyond tolerance. Replace it immediately to avoid damage to the 0750117075: TAPER ROLLER BEARING.
Q: Can I reuse this shim during a transmission rebuild?
A: No. ZF genuine shims are single-use components. The hardened steel deforms plastically during initial torque-down. Always install a new 0730.109.408 shim and check preload with a dial indicator.
Q: Does this shim fit the ZF 4WG-310 transmission?
A: No. The 0730.109.408 is designed for the WG180 through WG210 series. For the 4WG-310, use the thicker shim set (part number 0730.109.412). Always verify by comparing the outer diameter and thickness against your original part.
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