Overview
The ZF 4657.171.035 COUPLING is a critical torque-transfer component engineered specifically for the WG 190 and WG 210 transmission series. Positioned between the engine flywheel and the transmission input shaft, this OEM genuine coupling absorbs torsional vibrations and ensures smooth power delivery under heavy-duty cycles. The SKU 4657.171.035 is manufactured to ZF’s exacting tolerances, making it a direct replacement for worn units in commercial vehicles and industrial machinery. When installed alongside the 4657101033: TRANSMISSION HOUSING, this coupling maintains proper alignment and prevents premature wear on adjacent driveline components.
Symptoms of Failure
- Torque fluctuation during acceleration – A worn 4657.171.035 coupling causes noticeable surging or hesitation, especially when climbing grades or under load.
- Metallic clicking or clunking from the bell housing – As the coupling’s elastomeric element degrades, loose metal-to-metal contact produces audible noise during gear changes.
- Oil seepage near the flywheel housing – Cracks in the coupling body allow transmission fluid to escape, leaving visible drips on the undercarriage.
- Vibration at specific RPM ranges – A failing coupling fails to dampen harmonics, resulting in a pronounced shake between 1,200–1,800 RPM.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4657.171.035 |
| Outer Diameter | 210 mm |
| Inner Diameter | 65 mm |
| Overall Length | 95 mm |
| Material | High-tensile steel with elastomeric damping insert |
| Weight | 3.2 kg |
| OEM Reference | ZF 4657.171.035 |
| Torque Capacity | 1,200 Nm |
Compatibility
This coupling is designed for ZF WG 190 and WG 210 series transmissions, commonly found in municipal buses, refuse trucks, and medium-duty construction vehicles. It also fits select WG 180 and WG 200 variants where the input shaft diameter matches 65 mm. For proper installation, ensure the 4657201027: HOUS.FRONT SECT and 4657201012: HOUSING REAR PART are free of cracks or distortion. The 0631306792: CYLINDRICAL PIN must also be inspected for wear, as it locates the coupling hub during assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101033 | TRANSMISSION HOUSING | Encloses and supports all internal transmission components |
| 4657201027 | HOUS.FRONT SECT | Front section of the transmission housing, aligns with the coupling |
| 4657201012 | HOUSING REAR PART | Rear housing section, supports output shaft and bearings |
| 0631306792 | CYLINDRICAL PIN | Precision alignment pin for coupling-to-hub positioning |
| 0636100801 | CAP SCREW | Fastens the coupling to the flywheel adapter |
| 4656301148 | FIXING PLATE | Secures the coupling assembly to prevent axial movement |
| 4657301032 | SCREEN SHEET | Fine mesh filter for transmission oil circuit |
| 4657301033 | SCREEN SHEET | Alternate mesh filter for high-flow oil systems |
| 0636100803 | CAP SCREW | Heavy-duty cap screw for rear housing attachment |
| 4681301040 | OIL FEED.HOUSG. | Distributes pressurized oil to the coupling and clutch pack |
Frequently Asked Questions
Q: Can the 4657.171.035 coupling be reused after removal?
A: ZF recommends replacing this coupling whenever the transmission is overhauled. The elastomeric insert loses resilience over time, and reusing it risks vibration damage to the input shaft and TRANSMISSION HOUSING.
Q: What torque specification should I use for the cap screws?
A: Tighten the CAP SCREW (0636100801) to 85 Nm and the CAP SCREW (0636100803) to 110 Nm. Always use a calibrated torque wrench and apply thread locker.
Q: How do I verify the coupling is aligned correctly?
A: Use the CYLINDRICAL PIN (0631306792) to center the coupling hub. Rotate the assembly by hand—any binding indicates misalignment of the HOUS.FRONT SECT or HOUSING REAR PART.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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