Overview
The ZF 4616.302.068 WASHER for WG 65 is a precision-engineered OEM genuine component designed to function as a critical sealing and load-distribution interface within the ZF WG series transmission assembly. This washer sits between the transmission housing and fastening hardware, ensuring proper clamping force and preventing fluid migration at joint interfaces. Specifically cataloged under SKU 4616.302.068, this part is essential for maintaining the hydraulic integrity of the gearbox, particularly in heavy-duty commercial vehicle applications. When installed alongside the 4616101065: TRANSMISSION HOUSING, it provides the necessary surface protection and sealing to withstand high torque and thermal cycling.
Symptoms of Failure
- Transmission fluid seepage at housing bolt points: A worn or crushed 4616.302.068 washer often results in visible oil weeping around the hexagon screw interfaces, leading to gradual fluid loss.
- Loose fasteners causing gear engagement noise: When the washer loses its compressive resilience, bolts such as the 0636011038: HEXAGON SCREW may back out slightly, producing a metallic rattle or clunk during gear shifts.
- Reduced hydraulic pressure and sluggish shifting: A compromised seal from a deformed washer can allow air ingress into the hydraulic circuit, resulting in delayed or harsh clutch engagement.
- Corrosion-induced bolt seizure: A failed washer permits moisture ingress between the housing and fastener, accelerating galvanic corrosion around the 0636011118: HEXAGON SCREW and 0636016015: HEXAGON SCREW.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 4616.302.068 |
| Material | Zinc-plated spring steel (estimated) |
| Inner Diameter | 14.2 mm (estimated) |
| Outer Diameter | 28.0 mm (estimated) |
| Thickness | 2.5 mm (estimated) |
| Weight | 0.012 kg (estimated) |
| OEM Reference | ZF 4616.302.068 |
| Hardness Class | 8.8 (matching screw grade) |
Compatibility
This washer is specifically designed for the ZF WG 65 series transmission, but its dimensions and load rating make it suitable for other WG-series gearboxes sharing the same housing bolt pattern. Compatible models include the ZF WG 65, WG 80, WG 120, WG 150, WG 180, and WG 200 transmissions. It is commonly used in conjunction with the 0631306085: CYLINDRICAL PIN for alignment and the 0634313118: O-RING for additional sealing at adjacent ports. For optimal performance, always pair this washer with the correct 0636304019: SCREW PLUG and 0634801152: SEALING RING to prevent cross-threading and fluid bypass.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616101065 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 0636011038 | HEXAGON SCREW | Fastener for housing and cover plates |
| 0636011118 | HEXAGON SCREW | High-torque bolt for bearing caps |
| 0636016015 | HEXAGON SCREW | Flanged bolt for oil pan attachment |
| 0631306085 | CYLINDRICAL PIN | Alignment dowel for housing mating |
| 0634313118 | O-RING | Static seal for hydraulic passages |
| 0636304019 | SCREW PLUG | Port closure for pressure testing |
| 0634801152 | SEALING RING | Copper gasket for drain plug |
| 0732611049 | FILTER INSERT | Hydraulic oil filtration element |
| 0634303718 | O-RING | Internal seal for valve body |
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