Overview
The ZF 0630.531.288 RETAINING RING is a precision-engineered circlip designed to secure axial positioning of internal components within ZF powershift transmissions. This OEM genuine part, identified by SKU 0630.531.288, fits into a machined groove on the main shaft assembly to lock bearings, gears, and hubs in place under high torque loads. In heavy-duty construction machinery transmissions, this retaining ring prevents lateral movement of the 2094104412: MAIN SHAFT and the 2094304054: MAIN SHAFT assemblies, ensuring consistent gear mesh alignment throughout the transmission’s service life.
Symptoms of Failure
- Transmission oil leaks at shaft seals: A worn or fatigued retaining ring allows axial shaft play, which displaces seal contact surfaces and causes gradual fluid seepage around output flanges.
- Intermittent gear slipping under load: When the ring loses its grip, the 2094106010: SHIFT SYSTEM components can shift out of tolerance, leading to momentary power loss during excavation or grading operations.
- Abnormal driveline vibration: A broken or deformed retaining ring permits radial movement of the 2094206001: GEARSHIFT SHAFT, creating low-frequency vibrations that worsen with engine RPM.
- Metallic debris in transmission fluid: As the ring wears against its groove, microscopic steel particles contaminate the hydraulic circuit, often detected during routine oil sampling.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0630.531.288 |
| Type | Internal Circlip / Retaining Ring |
| Material | Spring Steel (DIN 17222 / C67S) |
| Surface Finish | Phosphate coated, oiled |
| Nominal Diameter (Inner) | 88.0 mm |
| Cross-Section Thickness | 3.5 mm |
| Weight | 0.045 kg |
| OEM Reference | ZF 0630.531.288 |
| Groove Width Required | 3.7 mm (max) |
Compatibility
This retaining ring is engineered for ZF powershift transmissions commonly installed in wheel loaders, dozers, and graders. It is a direct replacement for the following transmission models: ZF WG180, ZF WG200, ZF 4WG200, and ZF 6WG200 series. The ring interfaces directly with the main shaft spline assembly and the shift rail housing. For complete rebuilds, always pair this ring with a new 0630513070: SNAP RING and 2094306019: WASHER to maintain proper axial clearance.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2094104412 | MAIN SHAFT | Transfers torque from engine to gear cluster |
| 2094304054 | MAIN SHAFT | Secondary shaft for countershaft drive |
| 2094106010 | SHIFT SYSTEM | Hydraulic shift fork assembly for gear selection |
| 2094206001 | GEARSHIFT SHAFT | Transfers shift rail motion to fork |
| 2094306053 | GEARSHIFT SHAFT | Alternate length shift shaft for WG200 |
| 0630513070 | SNAP RING | External retaining ring for bearing caps |
| 2094306019 | WASHER | Thrust washer for axial load distribution |
| 0732040444 | COMPRESSION SPRING | Detent spring for shift rail positioning |
| 0732040728 | COMPRESSION SPRING | Heavy-duty spring for high-torque shifts |
| 2093206001 | BUSH | Guide bushing for shift shaft support |
Frequently Asked Questions
Q: Can I reuse the old retaining ring during a transmission rebuild?
No. The ZF 0630.531.288 is a single-use component. Once removed from its groove, the spring steel loses its original tension and will not provide adequate axial retention. Always install a new OEM ring to prevent premature shaft movement.
Q: How do I verify the correct installation depth for this ring?
After seating the ring, use a feeler gauge to check that the gap between the ring and the groove shoulder does not exceed 0.15 mm. Excessive clearance indicates a worn groove or incorrect part fitment.
Q: Does this retaining ring fit ZF 4WG180 transmissions?
Yes. The 0630.531.288 is compatible with the 4WG180, 4WG200, and 6WG200 series. However, always cross-reference your transmission serial number with the ZF parts catalog to confirm groove dimensions.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
Request a Quote →
