Overview
The ZF 0730.108.405 SHIM is a precision-engineered OEM genuine part designed to establish critical axial clearances within heavy-duty ZF powershift transmissions. This thin, hardened steel shim sits between the differential housing and bearing races, compensating for manufacturing tolerances and ensuring correct preload on rotating assemblies. The SKU 0730.108.405 is specifically calibrated for use in construction machinery transmissions, where even a 0.1mm gap deviation can lead to premature component wear. By maintaining exact spacing, this shim prevents axial play in the differential carrier, directly supporting the stability of the 5838109007: DIFFERENTIAL assembly and the 0750117075: TAPER ROLLER BEARING that it seats against.
Symptoms of Failure
- Transmission gear slipping under load – A worn or collapsed shim allows the differential carrier to shift axially, causing intermittent gear disengagement during heavy excavation or grading operations.
- Low-frequency rumbling from the differential housing – Excessive clearance from a degraded shim permits the 2095209019: DIFFERENTIAL to oscillate, generating a distinct metallic rumble that intensifies with vehicle speed.
- Oil contamination with metallic debris – As the shim thins, the taper roller bearing loses preload, leading to spalling that sheds steel particles into the transmission fluid.
- Hard shifting or delayed engagement – Incorrect shim thickness alters the position of the clutch pack, causing the 0631329086: SPRING PIN to bind and preventing smooth hydraulic actuation.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number / SKU | 0730.108.405 |
| Material | Case-hardened spring steel (DIN 1.3505 equivalent) |
| Thickness | 1.50 mm (nominal, selectable tolerance class) |
| Outer Diameter | 68.0 mm |
| Inner Diameter | 42.5 mm |
| Weight | 0.018 kg |
| Surface Hardness | 58–62 HRC |
| OEM Reference | ZF 0730.108.405 |
Compatibility
This shim is an original equipment component for ZF WG series powershift transmissions commonly installed in wheel loaders, dozers, and graders. It is directly compatible with the following ZF transmission models: WG180, WG200, WG210, and WG250. The 0730.108.405 shim is also used in select ZF Ecomat 5HP and 6HP variants that share the same differential carrier architecture. Always verify the shim stack height during rebuilds—combining this part with a new 5838300817: THRUST WASHER ensures correct end-play in the differential assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109007 | DIFFERENTIAL | Distributes torque to final drives; houses the shim and bearings |
| 0750117075 | TAPER ROLLER BEARING | Supports differential carrier rotation; requires correct shim preload |
| 2095209019 | DIFFERENTIAL | Alternate differential variant for WG200 transmissions |
| 0631329086 | SPRING PIN | Secures shift fork linkage; alignment affected by shim wear |
| 5838300817 | THRUST WASHER | Controls axial clearance between differential and housing |
| 5838300682 | DIFFERENTIAL AXLE | Transfers power from differential to planetary gears |
| 5838300811 | THRUST WASHER | Secondary axial spacer for differential side gears |
| 5841302064 | THRUST WASHER | High-load washer for output shaft support |
| 5838300137 | OUTER CLUTCH DISK | Steel friction plate for clutch pack engagement |
| 5838300138 | INNER CLUTCH DISK | Friction-lined disk for torque transfer |
