Overview
The ZF 4656.171.064 COUPLING is a critical OEM genuine component engineered for the WG 130 and WG 160 transmission series. This precision-machined coupling serves as the primary torque transfer interface between the engine output and the transmission input shaft, ensuring seamless power delivery under heavy-duty industrial loads. As part of the WG 171 Series assembly, the SKU 4656.171.064 is designed to absorb torsional vibrations and maintain driveline alignment. When installed alongside the 4656101030: TRANSMISSION HOUSING, this coupling forms a sealed, high-torque junction that prevents energy loss and mechanical wear.
Symptoms of Failure
- Torque fluctuation under load: If the coupling splines or elastomeric elements degrade, operators may notice uneven power delivery or “jerking” during acceleration, especially in WG 130 transmissions.
- Metallic grinding or clunking noises: Worn coupling teeth produce audible chatter from the bell housing area, often misdiagnosed as gear slipping.
- Oil seepage at the housing joint: A failing coupling can compromise the seal between the 4656301066: HOUS.FRONT SECT and the main case, leading to visible fluid leaks.
- Vibration at idle or low RPM: Imbalanced coupling rotation causes resonance that travels through the 4656201015: SCREEN SHEET and into the chassis.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4656.171.064 |
| Material | High-strength alloy steel (case-hardened) |
| Outer Diameter | 180 mm |
| Inner Spline Diameter | 65 mm |
| Overall Length | 95 mm |
| Weight | 2.8 kg |
| Torque Capacity | 1,200 Nm (peak) |
| Operating Temperature Range | -40°C to +120°C |
| OEM Reference | ZF WG 171 Series |
Compatibility
This coupling is specifically validated for the ZF WG 130 and ZF WG 160 transmission models. It also fits select variants of the WG 180 and WG 200 series when used with the correct 4656301037: TUBE adapter. Always verify the spline count and pilot bore dimensions against your existing assembly. The part is not backward-compatible with pre-2005 WG 80 series units without modification to the TRANSMISSION HOUSING.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101030 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 4656301066 | HOUS.FRONT SECT | Front section housing the input shaft |
| 4656201015 | SCREEN SHEET | Debris filter for hydraulic circuit |
| 4656301037 | TUBE | Oil transfer conduit between sections |
| 0634313514 | O-RING | Seals coupling-to-housing interface |
| 0636100803 | CAP SCREW | M10 fastener for housing retention |
| 4656301064 | HOUSING REAR PART | Rear casing for output shaft support |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing halves |
| 0636100801 | CAP SCREW | M8 fastener for front section |
| 0636100160 | CAP SCREW | M12 fastener for rear housing |
Frequently Asked Questions
Q: How do I know if the 4656.171.064 coupling is failing?
A: Listen for a distinct “clunk” when shifting from neutral to drive, and check for oil residue around the bell housing. A visual inspection of the splines through the inspection port will reveal wear.
Q: Can this coupling be reused after a transmission rebuild?
A: ZF recommends replacing the coupling whenever the transmission is disassembled, as the elastomeric dampers degrade over time. Reuse risks premature failure of the TRANSMISSION HOUSING.
Q: Is the 4656.171.064 compatible with the WG 180?
A: Yes, but only when paired with the correct TUBE (part 4656301037) to accommodate the longer input shaft on WG 180 models.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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