Overview
The ZF 4646.151.074 COUPLING is a precision-engineered OEM sub-assembly designed for the WG 250, WG 260, and WG 310 series transmissions. This critical component functions as the primary torque transfer interface between the engine flywheel and the transmission input shaft, ensuring smooth power delivery and dampening torsional vibrations. As a direct OEM replacement, the SKU 4646.151.074 guarantees exact fitment and durability under high-load industrial applications. When servicing this coupling, it is essential to inspect and replace the accompanying 0636115293: 螺栓 and 0736300232: 螺栓 to maintain proper clamping force and prevent fastener fatigue.
Symptoms of Failure
When the ZF 4646.151.074 COUPLING begins to wear, operators will notice distinct performance degradation. Common failure symptoms include:
- Transmission shudder or vibration during acceleration – Worn coupling elements fail to dampen engine harmonics, causing noticeable driveline shake.
- Oil seepage at the bell housing joint – Degraded sealing surfaces allow transmission fluid to escape, often mistaken for a rear main seal leak.
- Metallic rattling or clunking from the transmission area – Loose or fatigued coupling components create audible noise during gear engagement or idle.
- Intermittent power loss or gear slipping – Insufficient torque transfer leads to erratic shifting and reduced load capacity.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number / SKU | 4646.151.074 |
| Material | High-strength alloy steel with nitrided surface |
| Outer Diameter | 310 mm (estimated) |
| Weight | 4.8 kg (estimated) |
| OEM Reference | ZF 4646.151.074 |
| Torque Capacity | Up to 2,500 Nm (estimated) |
| Operating Temperature | -20°C to +120°C |
Compatibility
This coupling is engineered for the ZF WG series powershift transmissions. It is directly compatible with the following models:
- ZF WG 180 Series
- ZF WG 200 Series
- ZF WG 250 Series
- ZF WG 260 Series
- ZF WG 310 Series
- ZF WG 311 Series
During installation, always replace the 4475280208: SCREW PLUG and 0634316523: O-RING to ensure a leak-free hydraulic circuit. The coupling assembly also interfaces with the 0501214611: 齿轮泵 for lubrication flow.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 0636115293 | 螺栓 | Mounting bolt for coupling flange |
| 0736300232 | 螺栓 | Secondary coupling retention bolt |
| 4475280208 | SCREW PLUG | Hydraulic port sealing plug |
| 0634316523 | O-RING | Seal for coupling-to-shaft interface |
| 0630361026 | SEALING CAP | Protective cap for unused ports |
| 0501214611 | 齿轮泵 | Hydraulic pump for clutch actuation |
| 0634313945 | O形圈 | Secondary hydraulic seal |
| 0501322534 | TEMPERATURE SENSOR | Transmission oil temperature monitoring |
| 0634313366 | O-RING | Sensor mounting seal |
| 4646130044 | ENGINE CONNECTION | Flywheel-to-coupling adapter plate |
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