Overview
The ZF 4651.151.016 COUPLING is a critical torque-transfer component engineered specifically for the WG 100 and WG 110 transmission series. This OEM genuine part sits between the engine flywheel and the transmission input shaft, acting as a flexible connector that dampens torsional vibrations while ensuring precise power delivery. The SKU 4651.151.016 is manufactured to ZF’s exacting tolerances, making it essential for maintaining driveline integrity in heavy-duty industrial applications. When installed alongside the 4651101006: TRANSMISSION HOUSING, this coupling ensures that rotational forces are transmitted without excessive wear on adjacent components.
Symptoms of Failure
- Abnormal driveline vibration at low RPM: A worn 4651.151.016 coupling often causes noticeable shaking or shuddering during initial acceleration, particularly in WG 100 series transmissions.
- Intermittent loss of torque under load: When the coupling’s elastomeric element degrades, operators may experience sudden power drops when climbing grades or hauling heavy loads.
- Metallic clicking from bell housing area: As the coupling loses its damping capacity, metal-to-metal contact between the hub and the 4651301034: HOUSING produces distinct clicking noises during gear changes.
- Premature seal failure: Excessive coupling play forces the 0634303928: O-RING to deform, leading to fluid contamination and eventual leakage around the transmission input area.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4651.151.016 |
| Outer Diameter | 195 mm |
| Inner Bore Diameter | 45 mm |
| Overall Length | 85 mm |
| Material | High-tensile steel hub with nitrile rubber element |
| Weight | 2.4 kg |
| Max Torque Capacity | 1,200 Nm |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This coupling is primarily designed for the ZF WG 100 and WG 110 transmission families, which are commonly found in municipal trucks, fire apparatus, and medium-duty construction vehicles. While the 4651.151.016 is not directly compatible with WG 180 or WG 200 series due to spline count differences, it shares mounting patterns with the 4651301013: HOUSING used in earlier WG 80 variants. Always verify your transmission’s serial number before ordering, as ZF made dimensional changes to the coupling pocket after 2015.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4651101006 | TRANSMISSION HOUSING | Encloses gear train and supports input shaft bearings |
| 4651301034 | HOUSING | Provides mounting surface for coupling and clutch pack |
| 0634303928 | O-RING | Seals coupling cavity against fluid ingress |
| 4651301013 | HOUSING | Rear housing adapter for WG 100 series |
| 4651301015 | SCREEN SHEET | Filters debris from coupling lubrication oil |
| 4651301035 | SCREEN SHEET | Secondary filtration mesh for high-flow circuits |
| 0630361028 | SEALING CAP | Protects coupling hub splines during storage |
| 4475280060 | SCREW PLUG | Closes oil drain port in coupling housing |
| 0634303312 | O-RING | Seals screw plug against high-pressure oil |
| 0630361063 | SEALING CAP | Weatherproof cover for coupling inspection port |
