Overview
This ZF 0730.006.679 WASHER is an OEM genuine shim component engineered for precise axial clearance control within heavy-duty construction machinery transmissions. Positioned between the differential housing and the axle bevel gear set, this hardened steel washer ensures correct preload on the 0750117075: TAPER ROLLER BEARING assembly. The SKU 0730.006.679 directly supports load distribution across the 5838109012: DIFFERENTIAL unit, preventing metal-to-metal contact during high-torque operations. Without this critical shim, gear mesh patterns shift, leading to accelerated wear on adjacent components like the 2093209023: DIFFERENTIAL and the 5838300626: DIFFERENTIAL HOUSING.
Symptoms of Failure
- Transmission oil seepage at axle flange: A worn 0730.006.679 washer allows excessive differential housing movement, breaking the seal and causing slow hydraulic fluid loss.
- Intermittent gear slipping under load: When this shim loses its calibrated thickness, the taper roller bearing loses preload, permitting the differential to shift and momentarily disengage drive gears.
- Metallic grinding noise during turns: Insufficient washer support forces the bevel gear set to contact the housing wall, producing a distinct scraping sound that worsens with steering angle.
- Vibration in the driveline at low speeds: Uneven washer wear creates axial play in the differential assembly, transmitting harmonic vibrations through the axle shafts during construction site maneuvers.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0730.006.679 |
| Material | Hardened carbon steel (C45E + quench) |
| Outer Diameter | 68.0 mm |
| Inner Diameter | 42.5 mm |
| Thickness | 2.50 mm (selective fit) |
| Weight | 0.045 kg |
| OEM Reference | ZF 0730.006.679 |
| Surface Finish | Ground, Ra ≤ 0.8 µm |
Compatibility
This genuine ZF washer is engineered for the following transmission families used in wheel loaders, excavators, and telehandlers: WG180, WG200, WG210, and WG250 series. It also fits select ErgoPower and Ecolite models where the differential housing uses a 42.5 mm inner bore. Always verify the existing shim stack thickness before replacement. For complete differential rebuilds, pair this washer with the 5838300811: THRUST WASHER and the 5838300721: AXLE BEVEL GEAR to restore factory tolerances.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109012 | DIFFERENTIAL | Distributes torque between axle shafts |
| 0750117075 | TAPER ROLLER BEARING | Supports differential rotational loads |
| 2093209023 | DIFFERENTIAL | Secondary differential for multi-axle drives |
| 5838300626 | DIFFERENTIAL HOUSING | Encloses and positions gear set |
| 0631329088 | SPRING PIN | Secures washer alignment in housing |
| 5838300811 | THRUST WASHER | Controls axial end-play on bevel gear |
| 5838300721 | AXLE BEVEL GEAR | Transfers power to wheel hubs |
| 5838300633 | AXLE | Rotates wheel hub assembly |
| 5838300753 | THRUST WASHER | Reduces friction on axle shaft shoulder |
| 5838300818 | THRUST WASHER | Secondary axial load distribution |
Frequently Asked Questions
Q: Can I reuse the 0730.006.679 washer during a differential rebuild?
A: No. This shim is a single-use component. Its thickness is calibrated to factory tolerances, and any deformation from prior torque cycles will alter bearing preload. Always install a new washer.
Q: How do I measure the correct thickness for this washer?
A: Use a micrometer to measure the gap between the differential housing and bearing outer race after torquing the housing bolts. Select the washer thickness that brings the gap to 0.05–0.10 mm. The 0730.006.679 is a standard 2.50 mm shim; adjust with other shims if needed.
Q: Does this washer fit the ZF WG180 transmission?
A: Yes. The WG180, WG200, and WG210 all use the same differential housing bore diameter. Confirm your housing part number matches 5838300626: DIFFERENTIAL HOUSING for guaranteed fitment.
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