Overview
The ZF 0730.000.858 WASHER is a precision-engineered OEM genuine component designed specifically for the WG 65 Series transmission. This hardened steel washer functions as a critical load-spreading interface between fastener heads and housing surfaces, ensuring proper clamp load distribution during high-torque applications. Installed within the transmission’s main casing assembly, part number 0730.000.858 prevents galling and deformation at bolted joints. This washer is often replaced during a full transmission rebuild alongside the 4616101111: TRANSMISSION HOUSING to maintain structural integrity under heavy-duty cycles.
Symptoms of Failure
- Oil seepage at housing bolt interfaces: A worn or crushed 0730.000.858 washer reduces sealing pressure, allowing transmission fluid to migrate past the bolt head.
- Loose fasteners causing gear engagement noise: When the washer loses its original thickness, the 0636011118: HEXAGON SCREW can back off, leading to audible clattering during shifting.
- Vibration-induced housing cracking: A failed washer creates uneven load distribution, which may stress the 4616301304: HOUSING or 4616301309: HOUSING components, leading to micro-fractures over time.
- Torque loss at critical joints: Repeated thermal cycling can flatten the washer, causing fastener preload to drop below specification.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0730.000.858 |
| Inner Diameter | 14.2 mm |
| Outer Diameter | 28.0 mm |
| Thickness | 3.5 mm |
| Material | Hardened Carbon Steel (DIN 17222) |
| Surface Finish | Zinc-plated, passivated |
| Weight | 0.012 kg |
| OEM Reference | ZF 0730.000.858 |
| Hardness Rating | HRC 38-45 |
Compatibility
This washer is a direct-fit component for the ZF WG 65 Series transmission family. Based on its dimensional profile and application in the bolt pattern of the main housing, the 0730.000.858 is also compatible with the following ZF models: WG180, WG200, WG210, and WG250. It is commonly used in conjunction with the 0636011038: HEXAGON SCREW and 0636016015: HEXAGON SCREW for securing the transmission housing assembly. Always verify bolt pattern alignment before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616101111 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 0636011118 | HEXAGON SCREW | Fastener for housing attachment |
| 4616301304 | HOUSING | Secondary housing cover component |
| 4616301309 | HOUSING | Alternate housing cover variant |
| 0636011038 | HEXAGON SCREW | Bolt for auxiliary housing points |
| 0636016015 | HEXAGON SCREW | High-torque fastener for main joints |
| 0631306085 | CYLINDRICAL PIN | Alignment dowel for housing mating |
| 0634313118 | O-RING | Fluid seal between housing halves |
| 0636304019 | SCREW PLUG | Drain/fill port closure |
| 0634801152 | SEALING RING | Gasket for plug sealing |
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