Overview
The ZF 0630.503.017 SNAP RING is a precision-engineered retaining component designed for the WG 65 Series transmission. This OEM genuine part secures critical internal assemblies, such as the output shaft and planetary gear sets, within the transmission housing. By locking components axially in place, the snap ring prevents unwanted movement under high torque and vibration. The SKU 0630.503.017 is manufactured to ZF’s exacting tolerances, ensuring a secure fit that maintains gear alignment and drivetrain integrity. When paired with a properly torqued HEXAGON SCREW, this snap ring forms a vital part of the overall assembly, working alongside the OUTPUT and OUTPUT FLANGE to deliver reliable power transfer.
Symptoms of Failure
When the ZF 0630.503.017 SNAP RING fatigues or breaks, several distinct failure modes emerge. Transmission gear slippage under load is a primary indicator, as the ring can no longer hold the output shaft in its correct position. Unusual metallic rattling or clicking noises from the bell housing often signal that the ring has dislodged, allowing components to shift. Sudden loss of drive or intermittent engagement occurs when the ring fails completely, causing the planetary carrier to move axially. Additionally, oil leaks near the output flange may develop if the ring’s failure damages the adjacent TRANSMISSION HOUSING seal surface. These symptoms typically worsen during low-speed maneuvering or when towing heavy loads.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 0630.503.017 |
| Material | Spring steel (DIN 17222), phosphate-coated |
| Inner Diameter | 63.0 mm (nominal) |
| Outer Diameter | 68.5 mm (nominal) |
| Thickness | 2.5 mm |
| Weight | 0.012 kg |
| OEM Reference | ZF 0630.503.017 |
| Hardness | HRC 44-48 |
Compatibility
This snap ring is specifically engineered for the ZF WG 65 Series transmission family. It is directly compatible with the following models: WG65, WG80, WG90, WG100, and WG120. The part also fits select variants of the WG150 and WG180 series where the output shaft diameter matches 63 mm. Always verify the snap ring groove dimensions in your specific transmission housing before installation. For applications using the OUTPUT FLANGE, this ring ensures proper axial retention of the flange assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616105415 | OUTPUT | Transfers torque from planetary gearset to output flange |
| 4616303144 | OUTPUT FLANGE | Connects transmission output to driveshaft |
| 4616101094 | TRANSMISSION HOUSING | Encloses and supports all internal transmission components |
| 0636011038 | HEXAGON SCREW | Secures output flange to output shaft |
| 0636011118 | HEXAGON SCREW | Fastens housing cover to main case |
| 0636016015 | HEXAGON SCREW | Mounts valve body to transmission housing |
| 0631306085 | CYLINDRICAL PIN | Aligns housing halves during assembly |
| 0634313118 | O-RING | Seals output flange to prevent oil leakage |
| 0732611049 | FILTER INSERT | Traps debris in hydraulic circuit |
| 0634303718 | O-RING | Seals transmission housing cover joint |
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