Overview
The ZF 4646.152.076 COUPLING is a critical OEM sub-assembly component engineered for the WG 250, WG 260, and WG 310 series transmissions. This precision-machined coupling serves as the primary torque transfer interface between the transmission output shaft and the driveline, ensuring smooth power delivery under heavy-duty industrial loads. Positioned within the rear housing assembly, the SKU 4646.152.076 directly absorbs torsional vibrations and axial thrust forces. When installed correctly with the accompanying 0636115293: 螺栓 and 0736300232: 螺栓, this coupling maintains precise alignment, preventing premature wear on adjacent planetary gearsets.
Symptoms of Failure
- Transmission oil leaks at the output flange: A worn 4646.152.076 coupling often compromises the seal surface, allowing ATF to seep past the 0634316523: O-RING and accumulate on the bell housing.
- Audible clunking or knocking during gear engagement: Excessive backlash from a fatigued coupling produces a metallic “clunk” when shifting from neutral to drive or reverse, especially under load.
- Vibration at highway speeds (40-65 mph): A degraded coupling loses its dampening capacity, transmitting driveline harmonics directly into the chassis, often misdiagnosed as a bad U-joint.
- Intermittent gear slipping under heavy torque: When the coupling splines strip or deform, the transmission may momentarily lose power delivery during uphill climbs or sudden acceleration.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 4646.152.076 |
| Outer Diameter | 152 mm (estimated) |
| Inner Spline Diameter | 76 mm (estimated) |
| Overall Length | 95 mm |
| Material | Case-hardened 4140 alloy steel |
| Weight | 2.8 kg (6.2 lbs) |
| OEM Reference | ZF 4646.152.076 |
| Sealing Interface | Compatible with 0634316523: O-RING |
| Fastener Torque Spec | Use 4475280208: SCREW PLUG for port sealing |
Compatibility
This coupling is specifically engineered for the ZF WG 250, WG 260, and WG 310 series transmissions, including the WG 261 variant. It also fits select models in the WG 180 and WG 200 series when used with the correct adapter hardware. The 4646.152.076 is a direct replacement for OEM sub-assemblies in off-highway trucks, wheel loaders, and heavy-duty agricultural equipment. Always verify spline count and pilot bore dimensions against your transmission’s service manual before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 0636115293 | 螺栓 | Mounting bolt for coupling flange retention |
| 0736300232 | 螺栓 | Secondary bolt for housing-to-coupling interface |
| 4475280208 | SCREW PLUG | Seals hydraulic ports in the coupling assembly |
| 0634316523 | O-RING | Primary seal between coupling and output shaft |
| 0630361026 | SEALING CAP | Protects coupling splines during storage |
| 0501214611 | 齿轮泵 | Hydraulic pump driven by the coupling shaft |
| 0634313945 | O形圈 | Secondary O-ring for pressure containment |
| 0501322534 | TEMPERATURE SENSOR | Monitors coupling area oil temperature |
| 0634313366 | O-RING | Seal for sensor port on coupling housing |
| 4644301014 | 挡油盘 | Oil deflector shield for coupling lubrication |
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