Overview
The ZF 4657.173.046 COUPLING is a critical OEM genuine component engineered for the WG 190 and WG 210 transmission series. This precision-machined coupling serves as the primary torque transfer interface between the engine flywheel and the transmission input shaft, ensuring smooth power delivery and driveline alignment. As part of the WG 210 Series, the SKU 4657.173.046 is designed to absorb torsional vibrations and compensate for minor misalignment during operation. This coupling works in concert with the 4657201161: HOUS.FRONT SECT to form the forward housing assembly, while the 0636115293: 螺栓 secures the coupling to the drive plate. The 0634313603: O-RING provides a critical seal at the coupling interface, and the 0631306816: CYLINDRICAL PIN ensures precise alignment during installation.
Symptoms of Failure
- Torque fluctuation during acceleration: A worn coupling causes uneven power transfer, resulting in a surging or jerking sensation when shifting gears in WG 190 transmissions.
- Metallic clicking from bell housing: Deteriorated coupling teeth or splines produce a distinct clicking noise, especially at low RPM or during deceleration.
- Transmission fluid contamination: Cracking in the coupling hub can allow debris into the oil circuit, leading to premature wear of internal components like the 4681301040: OIL FEED.HOUSG.
- Vibration at highway speeds: Loss of coupling elasticity creates driveline shudder that is most noticeable between 45-65 mph in WG 210 applications.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4657.173.046 |
| Material | High-tensile alloy steel with nitrided surface |
| Outer Diameter | 210 mm (8.27 in) |
| Inner Diameter | 65 mm (2.56 in) |
| Thickness | 38 mm (1.50 in) |
| Weight | 2.85 kg (6.28 lbs) |
| OEM Reference | ZF 4657.173.046 |
| Torque Capacity | 1,850 Nm (1,364 ft-lbs) |
Compatibility
This OEM coupling is specifically validated for the ZF WG 190 and WG 210 transmission families. It is also compatible with the WG 180 series when used with the correct 0636100801: CAP SCREW kit. The part fits all WG 200 variants produced after 2015, including the WG 200 TS and WG 200 ECO models. For WG 211 and WG 220 transmissions, verify the spline count matches the 4656301148: FIXING PLATE before installation. This coupling is not recommended for the older WG 160 series without adapter components.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657201161 | HOUS.FRONT SECT | Front housing section for coupling enclosure |
| 0636115293 | 螺栓 | Mounting bolt for coupling attachment |
| 0634313603 | O-RING | Seal ring for coupling housing interface |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for precise coupling positioning |
| 0636100801 | CAP SCREW | Fastener for coupling-to-flywheel connection |
| 4656301148 | FIXING PLATE | Retention plate for coupling assembly |
| 4657301032 | SCREEN SHEET | Filter screen for coupling oil passage |
| 4657301033 | SCREEN SHEET | Secondary filter screen for debris protection |
| 0636100803 | CAP SCREW | Alternate fastener for heavy-duty applications |
| 4681301040 | OIL FEED.HOUSG. | Oil supply housing for coupling lubrication |
