Overview
The ZF 0730.006.504 WASHER is a precision-engineered, genuine OEM component designed specifically for the WG 65 series transmission. This hardened steel washer functions as a critical load-spreading interface between fasteners and the transmission housing, ensuring that clamping forces are evenly distributed during assembly. Located primarily at bolted joints on the gearbox casing, the SKU 0730.006.504 prevents galling and maintains structural integrity under high torque conditions. When paired with a 0636011118: HEXAGON SCREW, this washer guarantees a secure, vibration-resistant connection that protects the 4616101111: TRANSMISSION HOUSING from deformation over extended service intervals.
Symptoms of Failure
- Transmission oil seepage at bolt interfaces: A worn or crushed washer loses its sealing ability, allowing lubricant to migrate past the fastener head. This is often the first sign of washer fatigue in the WG65.
- Loose fasteners causing gear rattle: When the washer compresses beyond its elastic limit, bolt preload drops, leading to audible clattering during gear changes or under load.
- Surface corrosion or pitting on the housing: A degraded washer can trap moisture against the 4616301304: HOUSING, accelerating galvanic corrosion and compromising the joint’s structural bond.
- Inconsistent torque readings during reassembly: If a used washer is reinstalled, torque values become unreliable, increasing the risk of under-tightening or over-tightening the 4616301309: HOUSING assembly.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0730.006.504 |
| Inner Diameter | 14.2 mm |
| Outer Diameter | 28.0 mm |
| Thickness | 3.5 mm |
| Material | Hardened Carbon Steel (C45E) |
| Surface Treatment | Zinc-Nickel Plating (DIN 50979) |
| Hardness | HRC 38-42 |
| Weight | 0.012 kg |
| OEM Reference | ZF 0730.006.504 |
Compatibility
This washer is an original equipment fitment for the ZF WG 65 series, but its dimensions and load rating also make it suitable for select models in the WG180 and WG200 families where similar bolted interfaces exist. It is commonly used in conjunction with the 0636011038: HEXAGON SCREW and 0636016015: HEXAGON SCREW for securing transmission housings. For applications requiring precise alignment, the 0631306085: CYLINDRICAL PIN is often used alongside this washer to maintain dowel positioning. Always verify compatibility with your specific transmission serial number before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616101111 | TRANSMISSION HOUSING | Main casing that encloses gear sets and shafts |
| 0636011118 | HEXAGON SCREW | Fastener used to secure housing sections |
| 4616301304 | HOUSING | Intermediate housing for clutch or valve body |
| 4616301309 | HOUSING | Rear housing supporting output shaft bearings |
| 0636011038 | HEXAGON SCREW | M10 bolt for high-torque housing joints |
| 0636016015 | HEXAGON SCREW | M12 bolt for flange connections |
| 0631306085 | CYLINDRICAL PIN | Alignment dowel for precise housing mating |
| 0634313118 | O-RING | Seals fluid passages between housing sections |
| 0636304019 | SCREW PLUG | Closes oil drain or fill ports |
| 0634801152 | SEALING RING | Static seal for plug or sensor interfaces |
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