Overview
The ZF 4646.152.506 COUPLING is a precision-engineered OEM sub-assembly designed to transmit rotational torque between the engine flywheel and the transmission input shaft within the WG 250, WG 260, and WG 310 series. This critical driveline component absorbs torsional vibrations and dampens shock loads, ensuring smooth power transfer and protecting downstream gears from fatigue. As a direct replacement for the original factory part, SKU 4646.152.506 restores factory-specified clearance and alignment, preventing premature wear on adjacent components such as the TRANSMISSION HOUSING and the COVER.
Symptoms of Failure
- Oil leaks at the bell housing interface: A worn coupling can cause seal distortion, leading to transmission fluid weeping from the joint between the engine and gearbox.
- Gear slipping under load: When the coupling loses its damping capacity, the input shaft experiences erratic torque spikes, causing the transmission to momentarily disengage from the driven gear.
- Excessive driveline vibration: A degraded coupling fails to absorb engine harmonics, resulting in a noticeable shudder during acceleration or deceleration, particularly in WG 260 and WG 310 series units.
- Metallic rattling noise at idle: Loose or fatigued coupling elements produce a distinct clatter, indicating that the sub-assembly has lost its structural integrity.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4646.152.506 |
| Material | High-strength alloy steel with elastomeric damping insert |
| Outer Diameter | 180 mm (estimated) |
| Inner Diameter | 65 mm (estimated) |
| Thickness | 45 mm (estimated) |
| Weight | 3.2 kg (estimated) |
| OEM Reference | ZF 4646.152.506 |
| Torque Capacity | Up to 1,200 Nm (estimated) |
Compatibility
This coupling is engineered for the ZF WG 250, WG 260, WG 261, WG 310, and WG 311 series transmissions. It is also compatible with earlier WG 180 and WG 200 models that share the same input shaft spline geometry. Always verify the spline count and pilot bearing diameter before installation. For proper mounting, use the 螺栓 (part 0636115293) and 螺栓 (part 0736300232) to secure the coupling to the flywheel.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4646101173 | TRANSMISSION HOUSING | Encloses and supports internal gear sets |
| 4646301349 | COVER | Seals the rear of the transmission housing |
| 0636115293 | 螺栓 | Fastens coupling to flywheel |
| 0736300232 | 螺栓 | Secures housing to bell housing |
| 4475280208 | SCREW PLUG | Closes oil drain or fill ports |
| 0634316523 | O-RING | Prevents fluid leaks at joints |
| 0630361026 | SEALING CAP | Protects exposed openings |
| 0501214611 | 齿轮泵 | Provides hydraulic pressure for shifting |
| 0634313945 | O形圈 | Seals hydraulic circuits |
| 0501322532 | TEMPERATURE SENSOR | Monitors transmission fluid temperature |
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