Overview
The ZF 0631.302.070 CYLINDRICAL PIN is a precision-engineered locating and alignment component designed for the internal assembly of ZF WG100, WG130, and WG131 powershift transmissions. This OEM genuine part ensures accurate positioning of adjacent housing sections and gear train components, maintaining critical tolerances under high-torque loads. The SKU 0631.302.070 functions as a dowel pin within the transmission casing, preventing rotational shift of mating parts and distributing shear forces evenly across the joint. It is typically installed during transmission rebuilds or housing replacements to guarantee correct gear mesh alignment.
Symptoms of Failure
- Transmission housing misalignment and oil seepage: A worn or sheared cylindrical pin allows the 2094101017: TRANSMISSION HOUSING to shift slightly, creating gaps that cause ATF fluid to weep from mating surfaces.
- Abnormal gear engagement noise: When the pin fails, the 2094301069: HOUSING components lose their indexed position, resulting in clunking or grinding sounds during gear shifts under load.
- Progressive gear slipping under heavy load: Loss of pin integrity permits micro-movement of the 2094298054: HOUSING, which alters clutch pack clearances and leads to intermittent power loss.
- Recurring fastener loosening: A compromised pin forces the 0636302008: SCREW PLUG and adjacent bolts to bear excessive shear loads, causing them to back out over time.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0631.302.070 |
| Type | Cylindrical Dowel Pin |
| Material | Case-hardened alloy steel (DIN 6325) |
| Diameter | 8 mm (h6 tolerance) |
| Length | 30 mm |
| Surface Hardness | 58-62 HRC |
| Weight | ~12 grams |
| OEM Reference | ZF 0631.302.070 |
Compatibility
This cylindrical pin is engineered for ZF WG-series powershift transmissions, specifically the WG100, WG130, and WG131 models. It is also compatible with the WG180 and WG200 series when used in the same housing indexing locations. The part is commonly replaced alongside the 2094301071: COVER and 2094301030: GASKET during major overhauls. For complete sealing integrity, always pair this pin with a new 0750111371: SHAFT SEAL and 0634303085: O-RING on the adjacent housing interfaces.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2094101017 | TRANSMISSION HOUSING | Main casing assembly |
| 2094301069 | HOUSING | Intermediate housing section |
| 2094298054 | HOUSING | Rear housing component |
| 0636302008 | SCREW PLUG | Oil drain/fill port plug |
| 0634801165 | SEALING RING | Static seal for plugs |
| 0635460022 | BALL | Check valve ball |
| 2094301071 | COVER | Access cover plate |
| 2094301030 | GASKET | Cover sealing gasket |
| 0750111371 | SHAFT SEAL | Rotary shaft oil seal |
| 0634303085 | O-RING | Hydraulic circuit O-ring |
