Overview
The ZF 4646.151.474 COUPLING is a precision-engineered OEM sub-assembly designed to transfer rotational torque between the engine output and the transmission input shaft within the WG 250, WG 260, and WG 310 series. This critical driveline component absorbs torsional vibrations and ensures smooth power delivery, reducing stress on adjacent gear sets. As a direct replacement for the original factory part, SKU 4646.151.474 integrates seamlessly with the TRANSMISSION HOUSING and the COVER assembly to maintain proper alignment and hydraulic sealing. This coupling is essential for maintaining operational efficiency in heavy-duty industrial applications.
Symptoms of Failure
- Torque fluctuation under load: Worn splines or elastomeric elements cause intermittent power loss, often described as “gear slipping” during acceleration.
- Oil seepage at the bell housing: Degraded sealing surfaces allow transmission fluid to escape, leaving visible drips near the coupling joint.
- Abnormal metallic rattling: Loose or fractured coupling components produce a distinct clattering noise, especially at low RPMs.
- Vibration through the shift lever: Excessive axial play in the coupling transmits harmonics into the cab or operator station.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4646.151.474 |
| Outer Diameter | 180 mm (estimated) |
| Overall Length | 95 mm (estimated) |
| Material | High-tensile steel hub with nitrile rubber element |
| Weight | 2.8 kg (estimated) |
| OEM Reference | ZF 4646.151.474 |
| Fastener Torque | Use 螺栓 (M12) and 螺栓 (M10) per ZF spec |
Compatibility
This coupling is engineered for the ZF WG series of powershift transmissions, specifically the WG 180, WG 200, WG 250, WG 260, WG 261, WG 310, and WG 311 models. It fits both standard and high-torque variants used in construction, agricultural, and material handling equipment. Always verify the spline count and pilot bore diameter against your existing assembly before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4646101173 | TRANSMISSION HOUSING | Encloses gear train and supports shafts |
| 4646301349 | COVER | Seals the rear of the transmission case |
| 0636115293 | 螺栓 | Fastens coupling to flywheel |
| 0736300232 | 螺栓 | Secures cover to housing |
| 4475280208 | SCREW PLUG | Closes oil drain or fill ports |
| 0634316523 | O-RING | Prevents fluid leaks at joints |
| 0630361026 | SEALING CAP | Protects exposed threads from debris |
| 0501214611 | 齿轮泵 | Provides hydraulic pressure for clutch packs |
| 0634313945 | O形圈 | Seals hydraulic passages |
| 0501322532 | TEMPERATURE SENSOR | Monitors oil temperature for thermal protection |
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