Overview
The ZF 0730.006.680 WASHER is an OEM genuine shim component engineered for precise axial clearance control within heavy-duty construction machinery transmissions. This hardened steel washer sits between the differential housing and the taper roller bearing assembly, maintaining critical end-play tolerances that prevent gear train misalignment. As a factory-specification part, the SKU 0730.006.680 ensures exact load distribution across the differential gears, directly supporting the 5838109012: DIFFERENTIAL and 0750117075: TAPER ROLLER BEARING during high-torque operations. Without this washer, the entire differential assembly loses its calibrated preload, leading to accelerated wear on surrounding components.
Symptoms of Failure
- Transmission oil seepage at axle housing — When the 0730.006.680 washer compresses beyond tolerance, the 5838300626: DIFFERENTIAL HOUSING seal loses its crush fit, causing fluid to weep from the joint.
- Intermittent gear slipping under load — Worn shim thickness allows the 2093209023: DIFFERENTIAL to shift axially, resulting in momentary power loss during excavation or grading.
- Metallic grinding noise from transmission center — Excessive end-play causes the taper roller bearing to skid, producing a distinct chatter that worsens with hydraulic pressure.
- Uneven tire wear on drive axles — Misaligned differential gears distribute torque inconsistently, leading to premature tread degradation on construction equipment.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0730.006.680 |
| Material | Case-hardened alloy steel (DIN 1.7131) |
| Outer Diameter | 68.0 mm |
| Inner Diameter | 42.5 mm |
| Thickness | 2.50 mm (selective fit) |
| Weight | 0.045 kg |
| Surface Hardness | 58-62 HRC |
| OEM Reference | ZF 0730.006.680 |
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 4WG-310 and 6WG-200 models used in mining dump trucks. Always verify the existing shim stack thickness before replacement, as the 0730.006.680 is often paired with 5838300811: THRUST WASHER and 5838300721: AXLE BEVEL GEAR for complete differential rebuilds.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109012 | DIFFERENTIAL | Distributes torque between drive axles |
| 0750117075 | TAPER ROLLER BEARING | Supports differential rotation under load |
| 2093209023 | DIFFERENTIAL | Secondary gear set for planetary reduction |
| 5838300626 | DIFFERENTIAL HOUSING | Encloses gear assembly and retains lubricant |
| 0631329088 | SPRING PIN | Locks shift fork to actuation shaft |
| 5838300811 | THRUST WASHER | Controls axial play in bevel gear set |
| 5838300721 | AXLE BEVEL GEAR | Transfers power from differential to axle shaft |
| 5838300633 | AXLE | Drives wheel hub through final reduction |
| 5838300753 | THRUST WASHER | Reduces friction between planetary gears |
| 5838300818 | THRUST WASHER | Provides axial support for sun gear |
Frequently Asked Questions
Q: Can I reuse the 0730.006.680 washer during a transmission rebuild?
A: No. This shim washer deforms plastically during initial torque-down and must be replaced with a new OEM part to maintain factory end-play specifications.
Q: How do I know if my ZF transmission needs this specific washer thickness?
A: Measure the existing shim stack with a micrometer. If the total clearance exceeds 0.15 mm, select a 0730.006.680 washer that restores preload to 0.05-0.10 mm when paired with the 0750117075: TAPER ROLLER BEARING.
Q: Is this washer compatible with aftermarket differential housings?
A: Only when the housing matches ZF’s original bore diameter of 68.0 mm. Non-OEM housings often require the 5838300626: DIFFERENTIAL HOUSING to guarantee proper fitment.
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