Overview
The ZF 0631.302.064 CYLINDRICAL PIN is a precision-machined locating and alignment component engineered for the WG100, WG130, and WG131 transmission series. This OEM genuine part serves as a critical dowel within the valve body and housing assembly, ensuring exact positional accuracy during gear shifts and hydraulic pressure distribution. The SKU 0631.302.064 is designed to resist shear forces and maintain structural integrity under high torque loads, directly supporting the 4699101181 HOUSING and 4699301191 HOUSING assemblies. Without this cylindrical pin, the transmission’s internal alignment would degrade, leading to premature wear on adjacent components.
Symptoms of Failure
- Erratic gear engagement or slipping: When the 0631.302.064 pin wears or fractures, the valve body shifts out of alignment, causing delayed or harsh gear changes.
- Hydraulic fluid leaks near the housing interface: A damaged pin allows the 4699301041 COVER to misalign, breaking the seal and leading to external oil seepage.
- Unusual metallic rattling from the transmission sump: Broken pin fragments can circulate in the oil, creating noise and scoring internal surfaces.
- Intermittent loss of drive in forward or reverse: Pin failure disrupts the 0634303936 O-RING seal integrity, causing pressure drops that prevent clutch pack engagement.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 0631.302.064 |
| Type | Cylindrical Pin (Dowel) |
| Material | Case-hardened alloy steel |
| Diameter | 8 mm (nominal) |
| Length | 24 mm |
| Weight | ~9.5 grams |
| OEM Reference | ZF 0631.302.064 |
| Hardness | HRC 58-62 |
Compatibility
This cylindrical pin is specifically validated for the ZF WG100, WG130, and WG131 off-highway transmission families. It is also commonly used in the WG180 and WG200 series as a secondary locating pin for the main control housing. Always verify fitment against your transmission’s serial number, as variations exist between early and late production runs. The pin works in concert with the 0630513203 SNAP RING and 0750110302 SHAFT SEAL to secure the housing stack.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699101181 | HOUSING | Main transmission housing casting |
| 4699301191 | HOUSING | Intermediate housing section |
| 4699301041 | COVER | Valve body cover plate |
| 0634303936 | O-RING | Hydraulic seal between housings |
| 0630513203 | SNAP RING | Retains shaft in bore |
| 0750110302 | SHAFT SEAL | Prevents oil leakage at output shaft |
| 0630513073 | SNAP RING | Internal retaining ring for clutch pack |
| 0501319149 | SCREW PLUG | Seals hydraulic test ports |
| 0636302013 | SCREW PLUG | Oil drain plug |
| 0634801038 | SEALING RING | Copper crush washer for plugs |
