Overview
The ZF 0730.109.170 SHIM (SKU: 0730.109.170) is a precision-engineered OEM genuine part designed to establish critical axial clearances within ZF construction machinery transmissions. This thin, hardened steel shim sits between the bearing cover and the housing assembly, allowing technicians to fine-tune end-play and preload on rotating shafts. By compensating for manufacturing tolerances and wear, the 0730.109.170 ensures that gear meshing remains optimal under heavy load conditions. It is a non-serviceable wear item that must be replaced during any major transmission rebuild to prevent premature component fatigue.
Symptoms of Failure
- Excessive axial play in the output shaft: When this shim wears or compresses beyond specification, you may notice a distinct clunking or knocking sound during gear engagement, especially in forward/reverse shifts.
- Premature bearing failure: A worn 0730.109.170 shim allows the BEARING COVER to shift, leading to uneven load distribution on tapered roller bearings. This manifests as a high-pitched whine that increases with road speed.
- Oil seepage at the housing joint: Incorrect shim thickness can distort the HOUSING seal surface, causing transmission fluid to weep past the GASKET. Look for dark, oily residue around the bell housing area.
- Intermittent gear slippage under load: As the shim loses its dimensional stability, the HOUSING alignment shifts, reducing clutch pack clamping force. Operators may report a momentary loss of power when climbing grades.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0730.109.170 |
| Material | Hardened spring steel (C67S equivalent) |
| Thickness | 0.30 mm (0.0118 in) |
| Outer Diameter | 68.0 mm (2.677 in) |
| Inner Diameter | 42.0 mm (1.654 in) |
| Weight | 8 grams (0.28 oz) |
| OEM Reference | ZF 0730.109.170 |
| Surface Finish | Ground, deburred edges |
Compatibility
This shim is primarily used in ZF WG180, WG200, and WG250 series powershift transmissions found in wheel loaders, dozers, and graders. It also appears in select ZF 4WG-200 and 6WG-200 models where the bearing preload stack includes a PLANET CARRIER and BALL BEARING arrangement. Always verify the shim thickness requirement using the factory service manual, as multiple thickness variants exist for the same transmission family.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4108101127 | HOUSING | Main structural casing for gear train |
| 4108201277 | HOUSING | Intermediate housing for clutch packs |
| 4108301304 | BEARING COVER | Retains and preloads output shaft bearings |
| 4108306173 | GASKET | Seals housing-to-cover interface |
| 0750110040 | SHAFT SEAL | Prevents fluid leakage at rotating shafts |
| 4108102055 | INPUT | Input shaft assembly for torque converter |
| 4108302191 | PLANET CARRIER | Holds planetary gear set components |
| 4108302007 | BEARINGSHEET | Shim pack for final bearing adjustment |
| 0750116343 | BALL BEARING | Radial support for intermediate shaft |
| 0730105878 | THRUST WASHER | Axial load distribution in gear sets |
