Overview
The ZF 0631.329.056 SLOTTED PIN is a critical locating and retaining component engineered for the WG100, WG130, and WG131 transmission series. This OEM genuine part, identified by SKU 0631.329.056, functions as a precision alignment dowel within the clutch pack and differential housing assembly. It ensures correct axial positioning of mating components, preventing rotational shift under high torque loads. When servicing the differential unit, this slotted pin works in concert with the 5838109007: DIFFERENTIAL to maintain gear mesh integrity. Its slotted design allows for secure staking or retention, making it indispensable for maintaining the structural integrity of the planetary gear set.
Symptoms of Failure
When the 0631.329.056 slotted pin wears or shears, operators will notice distinct operational issues. Look for these specific failure indicators:
- Erratic gear engagement or slipping: A broken pin allows the 0750117075: TAPER ROLLER BEARING to shift, causing inconsistent clutch application and power loss.
- Metallic rattling from the transmission housing: Loose pins create play between the differential carrier and the case, producing a distinct knocking sound during acceleration.
- Premature wear on clutch disks: Misalignment from a failed pin leads to uneven pressure on the 5838300137: OUTER CLUTCH DISK and 5838300138: INNER CLUTCH DISK, accelerating friction material degradation.
- Oil contamination with metallic debris: Sheared pin fragments circulate through the hydraulic system, scoring valve bodies and bearings.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0631.329.056 |
| Type | Slotted Spring Pin / Dowel |
| Material | High-Carbon Spring Steel (55Si7) |
| Outside Diameter | 8.0 mm (0.315 in) |
| Length | 28.0 mm (1.102 in) |
| Wall Thickness | 1.5 mm |
| Weight | 4.2 grams (0.15 oz) |
| OEM Reference | ZF 0631.329.056 |
| Hardness | HRC 44-48 |
Compatibility
This genuine ZF slotted pin is specifically designed for the WG series of powershift transmissions. It is a direct fit for the following models:
- ZF WG100 (all variants)
- ZF WG130 (all variants)
- ZF WG131 (all variants)
- ZF WG180 (select applications, verify with parts manual)
- ZF WG200 (select applications, verify with parts manual)
This pin is commonly replaced during a differential overhaul alongside the 2095209019: DIFFERENTIAL and the 0631329086: SPRING PIN to ensure all locating elements are renewed simultaneously.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109007 | DIFFERENTIAL | Distributes torque to axle shafts |
| 0750117075 | TAPER ROLLER BEARING | Supports differential carrier rotation |
| 2095209019 | DIFFERENTIAL | Secondary differential assembly |
| 0631329086 | SPRING PIN | Retains shift fork components |
| 5838300817 | THRUST WASHER | Controls axial end-play |
| 5838300682 | DIFFERENTIAL AXLE | Carries differential pinion gears |
| 5838300811 | THRUST WASHER | Reduces friction on side gears |
| 5841302064 | THRUST WASHER | Spacer for planetary carrier |
| 5838300137 | OUTER CLUTCH DISK | Steel drive plate for clutch pack |
| 5838300138 | INNER CLUTCH DISK | Friction-lined driven plate |
