Overview
The ZF 0730.104.644 WASHER is a precision-engineered sealing component specifically designed for the WG 65 series transmission. This OEM genuine part functions as a critical load-distributing and sealing interface between the transmission housing and fastening hardware, preventing fluid migration and maintaining clamping force integrity. The SKU 0730.104.644 is manufactured to ZF’s exacting tolerances, ensuring proper alignment when installed alongside the 4616101066 TRANSMISSION HOUSING and the 0636011118 HEXAGON SCREW assembly. This washer sits at the external mounting points of the transmission, providing a hardened bearing surface that prevents galling and distributes torque loads evenly during operation.
Symptoms of Failure
- Transmission fluid seepage at mounting flanges — When the 0730.104.644 washer loses its compressive memory, oil can migrate past the bolt interface, leaving visible wet spots on the housing exterior.
- Audible clicking or ticking during gear engagement — A worn or deformed washer allows micro-movement between the 4616301307 HOUSING and fasteners, creating metallic noise under load.
- Inconsistent bolt torque retention — Repeated thermal cycling can cause this washer to relax, leading to loosening of the 0636011118 HEXAGON SCREW and subsequent vibration issues.
- Accelerated wear on adjacent housing surfaces — A collapsed washer fails to protect the 4616301309 HOUSING from fretting corrosion, shortening overall transmission service life.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 0730.104.644 |
| Material | Hardened Spring Steel (DIN 17222) |
| Outer Diameter | 24.0 mm |
| Inner Diameter | 13.5 mm |
| Thickness | 2.5 mm |
| Surface Finish | Zinc-Nickel Plated (Corrosion Resistant) |
| Hardness | 40-48 HRC |
| Weight | 0.004 kg |
| OEM Reference | ZF 0730.104.644 |
Compatibility
This washer is a direct-fit component for the ZF WG 65 series transmission. Based on its dimensional characteristics and application in the mounting bolt pattern, the 0730.104.644 is also compatible with the following ZF transmission models: WG 80, WG 120, WG 150, WG 180, and WG 200 series. It is commonly used in conjunction with the 0636011038 HEXAGON SCREW and the 0636016015 HEXAGON SCREW for secure housing attachment. Always verify the specific bolt pattern and torque specifications for your transmission variant before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616101066 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 0636011118 | HEXAGON SCREW | Fastener for housing mounting points |
| 4616301307 | HOUSING | Secondary housing component for clutch pack |
| 4616301309 | HOUSING | Rear housing section for output shaft |
| 0636011038 | HEXAGON SCREW | M10 bolt for housing attachment |
| 0636016015 | HEXAGON SCREW | M12 bolt for high-torque applications |
| 0631306085 | CYLINDRICAL PIN | Alignment dowel for housing positioning |
| 0634313118 | O-RING | Static seal for fluid passages |
| 0636304019 | SCREW PLUG | Drain/fill port closure |
| 0634801152 | SEALING RING | Copper crush washer for plug sealing |
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