Overview
This ZF 0730.109.973 WASHER is an OEM genuine shim component engineered for precise axial clearance control within heavy-duty construction machinery transmissions. Positioned between the planetary carrier and the sun gear assembly, this hardened steel washer prevents metal-on-metal contact while maintaining critical end-play tolerances. The SKU 0730.109.973 is a factory-specified wear item that directly interfaces with the 2093101016 HOUSING and the 2093301030 TRANSMISSION HOUSING to ensure proper gear mesh alignment. Without this washer, the rotating assembly would experience destructive axial movement, leading to premature failure of adjacent components.
Symptoms of Failure
- Transmission oil seepage at housing joint: When the 0730.109.973 washer wears beyond tolerance, it allows the shaft to shift, breaking the seal between the TRANSMISSION HOUSING and the pump housing. Look for wet streaks along the mating flange.
- Intermittent gear slipping under load: A collapsed washer reduces clutch pack clamping force, causing the transmission to momentarily lose drive torque when climbing grades or moving heavy loads.
- Metallic grinding noise during cold starts: Worn washer material allows the planetary gears to contact the HOUSING directly, producing a distinct scraping sound that disappears as oil warms and expands clearances.
- Increased end-play at the output shaft: Measurable axial movement of more than 0.5mm at the PTO flange indicates the washer stack has compressed beyond service limits.
Technical Specifications
| Part Number | 0730.109.973 |
| Material | Hardened spring steel (DIN 1.8159) |
| Outer Diameter | 68.0 mm |
| Inner Diameter | 42.5 mm |
| Thickness | 1.5 mm |
| Surface Hardness | HRC 48-52 |
| Weight | 0.018 kg |
| OEM Reference | ZF 0730.109.973 |
Compatibility
This washer is dimensionally validated for ZF WG180, WG200, and WG250 series transmissions commonly found in wheel loaders, excavators, and telehandlers. It also fits select ZF Ecomat 4HP and 5HP models used in off-highway construction machinery. Always verify stack height using the 0730365092 TYPE PLATE specifications before installation. The washer seats against the 0631311009 GROOVED STUD which retains the clutch pack assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2093101016 | HOUSING | Encloses planetary gear set |
| 2093301030 | TRANSMISSION HOUSING | Main structural case |
| 0730365092 | TYPE PLATE | Identifies transmission model |
| 0631311009 | GROOVED STUD | Locates clutch pack |
| 4475280013 | SCREW PLUG | Seals oil gallery port |
| 2093301021 | GASKET | Prevents housing leaks |
| 0636302061 | SCREW PLUG | Closes pressure test port |
| 0634801215 | SEALING RING | Seals plug threads |
| 4475280039 | SCREW PLUG | Oil drain plug |
| 0634303144 | O-RING | Seals plug to housing |
Frequently Asked Questions
Q: Can I reuse the 0730.109.973 washer during a rebuild?
A: No. This is a single-use crush washer. Reusing it will not provide the correct preload and will lead to rapid wear of the HOUSING bore.
Q: How do I verify the correct washer thickness?
A: Measure the stack height with the TYPE PLATE code and compare to ZF service bulletin tolerances. The 0730.109.973 is 1.5mm nominal.
Q: Will this washer fit a ZF WG180 transmission from 1998?
A: Yes, the WG180, WG200, and WG250 all use the same washer diameter. Check that the GROOVED STUD is not worn before installation.
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