Overview
This ZF 0730.108.594 WASHER is an OEM genuine shim component engineered for precise axial clearance control within heavy-duty construction machinery transmissions. Positioned between planetary gear sets and bearing assemblies, this hardened steel washer absorbs thrust loads and maintains critical gear alignment under extreme torque conditions. The SKU 0730.108.594 is a factory-specified replacement part that ensures factory tolerances are restored during transmission rebuilds, preventing premature wear on adjacent components like the 5838109012: DIFFERENTIAL and the 0750117075: TAPER ROLLER BEARING.
Symptoms of Failure
- Transmission oil leaks from axle housing seals – A worn 0730.108.594 washer allows excessive axial play, distorting seal surfaces and causing fluid seepage around the differential housing.
- Gear slipping under load in construction equipment – When this thrust washer loses its original thickness, gear mesh depth decreases, leading to intermittent power loss during grading or lifting operations.
- Metallic grinding noise during low-speed turns – Insufficient washer clearance permits metal-on-metal contact between the bevel gear set and the 2093209023: DIFFERENTIAL, producing a distinct grinding sound.
- Vibration in the driveline at highway speeds – Uneven washer wear creates imbalance in the rotating assembly, transmitting noticeable vibration through the chassis.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0730.108.594 |
| Material | Case-hardened alloy steel (SAE 8620 equivalent) |
| Outer Diameter | 108 mm |
| Inner Diameter | 73 mm |
| Thickness | 2.5 mm |
| Weight | 0.18 kg |
| OEM Reference | ZF 0730.108.594 |
| Surface Hardness | 58-62 HRC |
Compatibility
This washer is a standard shim component in ZF WG180, WG200, and WG250 series transmissions commonly used in wheel loaders, graders, and telehandlers. It also appears in select ZF 4WG-200 and 6WG-200 powershift models. For exact fitment, verify the washer stack height against the 5838300626: DIFFERENTIAL HOUSING bore depth during assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109012 | DIFFERENTIAL | Distributes torque to axle shafts |
| 0750117075 | TAPER ROLLER BEARING | Supports differential carrier rotation |
| 2093209023 | DIFFERENTIAL | Secondary differential for planetary drives |
| 5838300626 | DIFFERENTIAL HOUSING | Encloses differential gear set |
| 0631329088 | SPRING PIN | Secures shift fork to rail |
| 5838300811 | THRUST WASHER | Controls axial play in planetary sets |
| 5838300721 | AXLE BEVEL GEAR | Transfers power to wheel hubs |
| 5838300633 | AXLE | Drives wheel rotation |
| 5838300753 | THRUST WASHER | Spacer for differential side gears |
| 5838300818 | THRUST WASHER | Adjusts pinion gear depth |
Frequently Asked Questions
Q: Can I reuse the old 0730.108.594 washer during a rebuild?
A: No. This washer is a single-use shim that deforms plastically under load. Always install a new OEM washer to maintain factory backlash specifications.
Q: How do I measure the correct washer thickness for my ZF transmission?
A: Use a depth micrometer on the differential housing bore, then subtract the bearing stack height. The 0730.108.594 is available in 0.1 mm increments; select the shim that achieves 0.05-0.15 mm end-play.
Q: Does this washer fit ZF 4WG-200 transmissions?
A: Yes, the 0730.108.594 is a common shim in 4WG-200, 6WG-200, and WG180 series. Always cross-reference your transmission serial number with the parts manual.
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