Overview
The ZF 0631.306.129 CYLINDRICAL PIN is a precision-engineered locating component designed specifically for the WG 201 Series transmission. This OEM genuine part ensures accurate alignment and secure positioning of internal assemblies within the gearbox housing. The SKU 0631.306.129 serves as a critical interface point, preventing rotational movement between mating components while maintaining strict tolerances under high-torque conditions. When installed correctly, this cylindrical pin works in concert with the TRANSMISSION HOUSING and TRANSMISSION HOUSING to maintain structural integrity during heavy-duty operations.
Symptoms of Failure
- Transmission housing misalignment causing gear whine: A worn 0631.306.129 pin allows the housing sections to shift, producing a distinct high-pitched noise during acceleration. This “ZF transmission whining noise” often indicates the pin has sheared or deformed.
- Oil seepage at housing mating surfaces: When the cylindrical pin fails, the THREADED BUSH and housing seal gaps widen, leading to “ZF WG200 oil leak around housing” conditions. This typically manifests as wet spots near the pin location.
- Intermittent gear engagement difficulty: A broken pin causes the SCREW PLUG and shift mechanism to lose alignment, resulting in “hard shifting ZF transmission” complaints from operators.
- Vibration during power take-off operation: Excessive play from a worn pin creates “ZF transmission vibration at idle” due to improper load distribution across the housing assembly.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0631.306.129 |
| Type | Cylindrical Pin (Dowel Pin) |
| Material | Case-hardened steel (DIN 6325 equivalent) |
| Diameter | 12 mm (nominal) |
| Length | 30 mm |
| Surface Hardness | 58-62 HRC |
| Weight | Approx. 0.027 kg |
| OEM Reference | ZF 0631.306.129 |
| Compliance | ISO 8734 |
Compatibility
This cylindrical pin is engineered for the ZF WG 201 Series, but its application extends to several related transmission models. Based on the part type and dimensions, the 0631.306.129 is compatible with the following ZF transmissions: WG180, WG200, WG201, WG202, WG210, and WG211. It is commonly used in construction vehicles, agricultural tractors, and material handling equipment where precise alignment between the COVER PLATE and main housing is required. Always verify fitment with your specific transmission serial number before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101160 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 4644301323 | TRANSMISSION HOUSING | Secondary housing section for clutch pack |
| 4644301189 | THREADED BUSH | Provides threaded interface for housing bolts |
| 4475280043 | SCREW PLUG | Seals oil passages in housing |
| 0634306198 | O-RING | Hydraulic seal between housing sections |
| 0730365067 | TYPE PLATE | Identification plate for transmission model |
| 4644301161 | COVER PLATE | Access cover for valve body inspection |
| 0636100621 | HEXAGON SCREW | Fastener for housing cover attachment |
| 0631610020 | SET SCREW | Adjustable stop for shift mechanism |
| 0501218540 | BREATHER | Pressure equalization valve for housing |
