Overview
The ZF 0730.008.586 WASHER is a precision-engineered OEM genuine component designed to maintain critical axial clearances within the differential assembly of heavy-duty construction machinery transmissions. This hardened steel washer sits between the differential housing and the bevel gear set, ensuring proper load distribution and preventing metal-on-metal contact during high-torque operations. As an integral part of the drivetrain, the SKU 0730.008.586 works in concert with the 5838109012: DIFFERENTIAL to maintain gear mesh accuracy. When installed correctly, it extends the service life of surrounding components by absorbing micro-vibrations and thermal expansion stresses.
Symptoms of Failure
- Transmission oil seepage at differential housing — A worn 0730.008.586 washer allows the 5838300626: DIFFERENTIAL HOUSING seal surface to degrade, causing slow oil drips that worsen under load.
- Gear whine during low-speed turning — Excessive axial play from a compressed washer creates irregular tooth contact between the 2093209023: DIFFERENTIAL gears, producing a distinct high-pitched whine.
- Intermittent driveline clunking — When the washer thickness drops below tolerance, the 0750117075: TAPER ROLLER BEARING loses preload, resulting in audible knocking during acceleration/deceleration.
- Premature bearing failure — A collapsed washer forces the taper roller bearing to operate outside its designed load zone, accelerating raceway spalling.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0730.008.586 |
| Material | Hardened alloy steel (DIN 1.3505 equivalent) |
| Outer Diameter | 68.0 mm |
| Inner Diameter | 42.5 mm |
| Thickness | 2.5 mm |
| Weight | 0.045 kg |
| OEM Reference | ZF 0730.008.586 |
| Surface Finish | Ground, phosphate-coated |
Compatibility
This genuine ZF washer is primarily specified for the WG180 and WG200 series powershift transmissions used in wheel loaders, graders, and dump trucks. It also fits select WG160 and WG240 variants where the differential assembly uses the same axial retention geometry. Always verify the part number against your transmission’s parts manual, as the 0730.008.586 is frequently paired with the 5838300811: THRUST WASHER in the same stack-up.
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 unit for tandem axles |
| 5838300626 | DIFFERENTIAL HOUSING | Encloses gear set and bearings |
| 0631329088 | SPRING PIN | Locks washer in position |
| 5838300811 | THRUST WASHER | Controls side gear end-play |
| 5838300721 | AXLE BEVEL GEAR | Transfers power to axle shafts |
| 5838300633 | AXLE | Drives wheel hub assembly |
| 5838300753 | THRUST WASHER | Spacer for differential pinion shaft |
| 5838300818 | THRUST WASHER | Adjusts differential bearing preload |
Frequently Asked Questions
Q: Can I reuse the 0730.008.586 washer during a rebuild?
A: No. This is a single-use crush washer that deforms during initial torqueing. Always install a new OEM washer to maintain proper preload on the taper roller bearing and differential assembly.
Q: How do I know if my WG200 transmission needs this washer?
A: Check for axial play at the differential input flange. If movement exceeds 0.15 mm when levering with a pry bar, the 0730.008.586 washer is likely compressed beyond service limits and must be replaced alongside the 5838300818: THRUST WASHER.
Q: Does this part fit ZF 4WG-200 transmissions?
A: Yes, the 0730.008.586 is compatible with 4WG-200 series when used with the correct differential housing (part 5838300626). Always cross-reference your housing casting number before ordering.
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