Overview
The ZF 0630.307.012 SPRING WASHER (SKU: 0630.307.012) is a critical load-distribution component engineered for the WG100, WG130, and WG131 transmission series. Positioned between the fastener head and the housing surface, this OEM genuine spring washer maintains consistent clamping force under extreme thermal cycling and vibration. It prevents loosening of adjacent assemblies, particularly where the 4699101045: HOUSING interfaces with the main gear train. Without this washer, bolt preload degrades rapidly, leading to misalignment in the clutch pack and planetary gear sets.
Symptoms of Failure
- Transmission oil seepage at bolt interfaces: A collapsed spring washer reduces sealing pressure, allowing fluid to escape around the 4699301108: HOUSING mounting points.
- Intermittent gear engagement noise: Loss of washer tension causes fastener back-off, resulting in audible clattering during load shifts.
- Increased vibration at the bell housing: When the washer flattens, the 4699301085: COVER loses its preload, amplifying driveline harmonics.
- Premature thread galling: A fatigued washer fails to distribute load evenly, accelerating wear on the 4699301014: THREAD PROTECTIVE SHIELD and bolt threads.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0630.307.012 |
| Inner Diameter | 12.2 mm |
| Outer Diameter | 24.0 mm |
| Thickness (Free) | 2.5 mm |
| Material | Spring Steel (DIN 17222, Zinc-Plated) |
| Weight | 4.8 g |
| OEM Reference | ZF 0630.307.012 |
| Hardness | HRC 44-50 |
| Finish | Yellow Passivated Zinc |
Compatibility
This spring washer is directly compatible with ZF WG100, WG130, and WG131 transmissions. It also fits select WG180 and WG200 variants where the fastener pattern matches the 12 mm inner diameter. Always verify the bolt seat diameter against the washer’s outer dimension. For adjacent sealing components, consider the 0634303141: O-RING and 0734307407: PROTECTION CAP to complete the assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699101045 | HOUSING | Main structural casing for gear train |
| 4699301108 | HOUSING | Intermediate housing for clutch assembly |
| 4699301085 | COVER | Seals and protects internal components |
| 4699301014 | THREAD PROTECTIVE SHIELD | Prevents bolt thread damage during installation |
| 0634303141 | O-RING | Static seal for fluid retention |
| 0734307407 | PROTECTION CAP | Dust cover for exposed ports |
| 0634301843 | SHAFT SEAL | Dynamic seal for rotating shafts |
| 0630502034 | RETAINING RING | Axial retention for bearings |
| 0637885612 | BREATHER | Pressure equalization vent |
| 0636102023 | CAP SCREW | Fastener for housing attachment |
