Overview
The ZF 0730.109.558 WASHER is a precision-engineered OEM genuine shim component designed to maintain critical axial clearances within ZF heavy-duty transmission assemblies. This hardened steel washer sits between the differential housing and the bearing race, ensuring correct preload on the differential assembly. As a load-bearing spacer, part number 0730.109.558 prevents metal-to-metal contact and compensates for thermal expansion during high-torque operations in construction machinery. Proper installation of this washer directly influences gear mesh patterns and overall drivetrain longevity.
Symptoms of Failure
- Transmission oil leaks at the differential housing seal – When the 0730.109.558 washer wears beyond tolerance, the differential housing shifts, breaking the seal integrity and causing fluid seepage.
- Gear whining or grinding noise during load cycles – A collapsed or deformed washer alters the pinion depth, creating abnormal gear contact patterns audible as a high-pitched whine under acceleration.
- Premature bearing failure in the differential carrier – Insufficient washer thickness reduces bearing preload, allowing the 0750117075: TAPER ROLLER BEARING to wobble, accelerating raceway spalling.
- Intermittent gear slipping or harsh engagement – Excessive end-play from a worn washer causes the differential gears to lose proper mesh, resulting in momentary torque loss.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 0730.109.558 |
| Material | Hardened Alloy Steel (DIN 1.3505) |
| Outer Diameter | 68.0 mm |
| Inner Diameter | 42.5 mm |
| Thickness | 2.50 mm |
| Weight | 0.045 kg |
| OEM Reference | ZF 0730.109.558 |
| Surface Hardness | HRC 58-62 |
Compatibility
This washer is a critical component in ZF WG180, WG200, and WG211 series powershift transmissions commonly found in wheel loaders, graders, and excavators. It is also used in ZF 4WG-200 and 6WG-200 drivelines. The 0730.109.558 interfaces directly with the 5838300626: DIFFERENTIAL HOUSING and the 5838109012: DIFFERENTIAL assembly. For applications requiring a complete differential rebuild, pair this washer with the 2093209023: DIFFERENTIAL unit to restore factory tolerances.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109012 | DIFFERENTIAL | Distributes torque between drive wheels |
| 0750117075 | TAPER ROLLER BEARING | Supports differential carrier rotation |
| 2093209023 | DIFFERENTIAL | Complete differential assembly for WG transmissions |
| 5838300626 | DIFFERENTIAL HOUSING | Encloses differential gears and bearings |
| 0631329088 | SPRING PIN | Secures differential gear shaft alignment |
| 5838300811 | THRUST WASHER | Reduces axial friction on differential gears |
| 5838300721 | AXLE BEVEL GEAR | Transfers power to axle shafts |
| 5838300633 | AXLE | Connects differential to wheel hubs |
| 5838300753 | THRUST WASHER | Controls side gear end-play |
| 5838300818 | THRUST WASHER | Adjusts differential carrier clearance |
Frequently Asked Questions
Q: Can I reuse the 0730.109.558 washer during a transmission rebuild?
A: No. This washer is a single-use crush-type shim. Reusing it will not restore proper preload, leading to premature bearing failure. Always replace with a new OEM genuine washer.
Q: How do I verify the correct thickness of this washer for my ZF transmission?
A: Measure the differential housing end-play using a dial indicator. The 0730.109.558 is a standard 2.50 mm thickness; however, ZF offers selectable thicknesses. Compare your measured gap to the service manual specifications.
Q: Does this washer fit ZF 4WG-200 transmissions?
A: Yes. The 0730.109.558 is compatible with ZF 4WG-200, 6WG-200, WG180, and WG211 series. Always cross-reference your transmission serial number with the OEM parts catalog.
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