Overview
The ZF 0730.000.857 WASHER for WG65 is a precision-engineered OEM genuine component designed to maintain critical sealing and load distribution within the transmission assembly. This hardened steel washer sits between the TRANSMISSION HOUSING and adjacent fasteners, preventing galling and ensuring proper torque retention. As an integral part of the WG 65 Series, the SKU 0730.000.857 works in concert with the HEXAGON SCREW to secure internal components against vibration-induced loosening. Its precise thickness and surface finish are critical for maintaining the correct preload on mating surfaces, directly influencing transmission longevity.
Symptoms of Failure
- Oil seepage at housing joints: A worn or deformed 0730.000.857 washer can compromise the seal between the HOUSING and cover, leading to visible fluid trails on the transmission exterior.
- Audible clicking during gear engagement: Loss of washer thickness allows fastener loosening, creating micro-movement between the HOUSING sections and producing metallic clicking sounds under load.
- Torque loss on critical fasteners: When the washer collapses beyond specification, hexagon screws cannot maintain their clamping force, resulting in gradual gear slippage during high-torque operation.
- Vibration increase at specific RPMs: A fatigued washer alters the damping characteristics of bolted joints, transmitting abnormal resonance through the drivetrain.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0730.000.857 |
| Material | Hardened Carbon Steel (DIN 17222) |
| Outer Diameter | 28.0 mm |
| Inner Diameter | 14.2 mm |
| Thickness | 3.0 mm |
| Surface Hardness | 45-50 HRC |
| Weight | 12 g |
| OEM Reference | ZF 0730.000.857 |
| Compatible Fastener | 0636011038 HEXAGON SCREW |
| Sealing Partner | 0634313118 O-RING |
Compatibility
While primarily specified for the WG 65 transmission series, the 0730.000.857 washer is also utilized in several ZF heavy-duty models sharing similar housing architectures. Compatible transmissions include the WG180, WG200, WG210, and WG250 series. It is commonly paired with the 0636016015 HEXAGON SCREW in final drive assemblies. For applications requiring alignment precision, this washer is often installed alongside the 0631306085 CYLINDRICAL PIN to ensure repeatable positioning during reassembly. Always verify fitment against your specific transmission serial number, as housing variants may require the 0636304019 SCREW PLUG or 0634801152 SEALING RING for complete refurbishment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616101111 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 0636011118 | HEXAGON SCREW | Fastener for housing sections |
| 4616301304 | HOUSING | Intermediate housing component |
| 4616301309 | HOUSING | Rear housing section |
| 0636011038 | HEXAGON SCREW | Alternate fastener for cover plates |
| 0636016015 | HEXAGON SCREW | High-torque fastener for final drive |
| 0631306085 | CYLINDRICAL PIN | Alignment dowel for housing mating |
| 0634313118 | O-RING | Static seal for oil passages |
| 0636304019 | SCREW PLUG | Threaded port closure |
| 0634801152 | SEALING RING | Copper crush washer for drain plugs |
