Overview
The ZF 0630.000.255 SHIM RING is a precision-engineered OEM genuine component designed to maintain critical axial clearances within ZF heavy-duty transmissions. Positioned between the planetary gear sets and the housing assembly, this shim ring ensures proper preload and alignment of rotating elements. The SKU 0630.000.255 is manufactured to exacting ZF tolerances, preventing metal-to-metal contact that can lead to premature wear. In construction machinery applications, this part works in concert with the 4699101018 HOUSING and the 4699301051 HOUSING to create a sealed, stable environment for gear operation. Without this shim ring, transmission assemblies risk excessive end-play and catastrophic failure under load.
Symptoms of Failure
- Transmission gear slipping under load: A worn or collapsed shim ring allows axial movement, causing gears to lose proper engagement during high-torque operations in excavators or loaders.
- Metallic grinding noise from the transmission housing: When the 0630.000.255 loses its thickness, rotating components contact the 4699301054 HOUSING COVER, producing distinct scraping sounds.
- Oil contamination with fine metal particles: Degraded shim material sheds debris into the lubricant, often detected during routine oil analysis on construction fleets.
- Vibration during gear shifts: Incorrect axial clearance from a failing shim ring causes driveline shudder, particularly in WG-series transmissions operating in rough terrain.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0630.000.255 |
| Material | Hardened spring steel (C67S) |
| Inner Diameter | 255 mm |
| Outer Diameter | 275 mm |
| Thickness | 2.50 mm (nominal) |
| Weight | 0.18 kg |
| OEM Reference | ZF 0630.000.255 |
| Surface Finish | Phosphate coated |
Compatibility
This shim ring is engineered for ZF WG180, WG200, and WG210 series transmissions commonly found in wheel loaders, telehandlers, and graders. It also fits select ZF 4WG-200 and 6WG-200 power shift transmissions. Always verify clearance requirements when replacing this part alongside the 4699301055 COVER to ensure correct stack-up height. For complete transmission rebuilds, pairing this shim ring with the 0634303996 O-RING and 0634319161 SHAFT SEAL is recommended to prevent fluid bypass.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699101018 | HOUSING | Encloses planetary gear sets |
| 4699301051 | HOUSING | Supports clutch pack assembly |
| 4699301054 | HOUSING COVER | Seals transmission front section |
| 4699301055 | COVER | Protects output shaft bearing |
| 4699301014 | THREAD PROTECTIVE SHIELD | Prevents bolt thread damage |
| 0634303996 | O-RING | Hydraulic seal for piston circuits |
| 0734307408 | PROTECTION CAP | Covers sensor ports during service |
| 0634319161 | SHAFT SEAL | Prevents oil leakage at rotating shaft |
| 0630502032 | RETAINING RING | Secures bearing in housing bore |
| 0637885612 | BREATHER | Equalizes internal pressure |
