Overview
The ZF 0730.006.688 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 planetary gear sets and the differential housing, maintaining critical end-play tolerances that prevent gear clash and bearing preload loss. As a factory-specification part, the SKU 0730.006.688 ensures exact thickness matching for ZF power shift transmissions, directly influencing torque distribution and drivetrain longevity. When installed alongside a DIFFERENTIAL HOUSING, this washer forms the foundational spacing layer that governs all downstream gear mesh patterns.
Symptoms of Failure
- Transmission oil leaks at axle housing interface – A worn 0730.006.688 washer allows excessive differential movement, breaking the seal between the DIFFERENTIAL and housing, causing fluid seepage during operation.
- Gear slipping under load in forward gears – When the washer thickness degrades, axial play increases, leading to intermittent torque loss and audible grinding from the planetary section.
- Premature taper roller bearing failure – Incorrect shim height from a collapsed 0730.006.688 directly overloads the TAPER ROLLER BEARING, producing metallic debris in the oil filter.
- Vibration during low-speed maneuvering – Worn clearance allows the DIFFERENTIAL to oscillate laterally, transmitting harsh feedback through the driveline at construction sites.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0730.006.688 |
| Material | Case-hardened alloy steel (DIN 1.7131) |
| Outer Diameter | 68.0 mm |
| Inner Diameter | 42.5 mm |
| Thickness | 1.88 mm |
| Weight | 0.042 kg |
| OEM Reference | ZF 0730.006.688 |
| Hardness | 58-62 HRC |
Compatibility
This washer is dimensionally validated for ZF WG180, WG200, and WG250 series power shift transmissions commonly used in wheel loaders, graders, and excavators. It specifically fits the differential preload stack in models with integrated parking brake assemblies. Always verify axial clearance with a dial indicator when replacing this shim. For complete differential rebuilds, pair this washer with a THRUST WASHER and AXLE BEVEL GEAR to restore factory tolerances.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109012 | DIFFERENTIAL | Distributes torque to axle shafts |
| 0750117075 | TAPER ROLLER BEARING | Supports radial and axial loads |
| 2093209023 | DIFFERENTIAL | Secondary differential assembly |
| 5838300626 | DIFFERENTIAL HOUSING | Encloses gear set |
| 0631329088 | SPRING PIN | Secures shift fork |
| 5838300811 | THRUST WASHER | Controls axial play |
| 5838300721 | AXLE BEVEL GEAR | Transfers power to wheels |
| 5838300633 | AXLE | Driveshaft component |
| 5838300753 | THRUST WASHER | Differential side clearance |
| 5838300818 | THRUST WASHER | Planetary gear spacing |
Frequently Asked Questions
Q: Can I reuse the 0730.006.688 washer during a transmission rebuild?
A: No. This shim is a single-use crush washer that deforms during initial torque application. Always install a new OEM genuine 0730.006.688 to maintain proper preload on the differential assembly.
Q: How do I measure if this washer is the correct thickness for my ZF WG200?
A: Use a depth micrometer to measure the recess depth in the differential housing, then subtract the bearing protrusion. The 0730.006.688 should provide 0.05-0.15 mm of axial clearance after final torque.
Q: Will this part fit ZF WG180 transmissions with serial numbers before 2010?
A: Yes, the 0730.006.688 supersedes all earlier shim variants. However, verify your housing uses the 68 mm outer diameter pocket; some early units used a 65 mm bore requiring a different washer.
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Phone: +86 158 2286 3467 |
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