Overview
The ZF 0630.502.016 RETAINING RING is a critical locking component engineered specifically for the WG 65 series transmission. This OEM genuine part secures the axial position of internal assemblies, preventing unwanted movement of shafts and gears under high torque loads. The SKU 0630.502.016 is precision-manufactured to ZF’s exacting tolerances, ensuring a tight fit within the transmission housing groove. It is commonly installed during rebuilds or repairs alongside the 4616105402: OUTPUT and the 4005303005: OUTPUT FLANGE to maintain drivetrain integrity.
Symptoms of Failure
- Axial play or end float in the output shaft: A worn or deformed retaining ring allows the shaft to shift, causing misalignment and accelerated wear on bearings.
- Unusual metallic rattling from the transmission housing: When the ring loses tension, components can vibrate against the 4616101119: TRANSMISSION HOUSING, producing a distinct noise during gear changes.
- Intermittent gear engagement failure: The ring’s failure to hold the gear stack in place leads to incomplete clutch pack compression, resulting in slipping or delayed shifts.
- Oil contamination from metal debris: A fractured retaining ring sheds fragments into the oil system, which can clog filters and damage hydraulic circuits.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 0630.502.016 |
| Material | Spring Steel (DIN 17222) |
| Inner Diameter | 90.0 mm |
| Outer Diameter | 105.0 mm |
| Thickness | 3.5 mm |
| Weight | 0.045 kg |
| OEM Reference | ZF 0630.502.016 |
| Surface Finish | Phosphate coated |
Compatibility
This retaining ring is designed for the ZF WG 65 series transmission family. It is also compatible with the following ZF models that share the same output shaft retention architecture: WG180, WG200, WG210, and WG250. Always verify the groove dimensions in your specific housing before installation. The ring works in conjunction with the 0636011038: HEXAGON SCREW to secure the output flange assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616105402 | OUTPUT | Transfers torque from transmission to driveshaft |
| 4005303005 | OUTPUT FLANGE | Connects output shaft to universal joint |
| 4616101119 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 0636011038 | HEXAGON SCREW | Fastens output flange to shaft |
| 0636011118 | HEXAGON SCREW | Secures bearing retainer plate |
| 0636016015 | HEXAGON SCREW | Mounts housing cover assembly |
| 0631306085 | CYLINDRICAL PIN | Aligns housing halves during assembly |
| 0634313118 | O-RING | Seals oil passages between housing sections |
| 0636304019 | SCREW PLUG | Closes inspection or drain ports |
| 0634801152 | SEALING RING | Prevents oil leaks at shaft exits |
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