Overview
The ZF 4657.174.042 COUPLING is a critical torque-transfer component engineered 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 loads. The SKU 4657.174.042 is precision-machined to ZF’s original specifications, guaranteeing a direct fit and long service life in commercial vehicle drivetrains. This part works in concert with the 4657101078: TRANSMISSION HOUSING to maintain proper alignment and sealing within the assembly.
Symptoms of Failure
- Oil leaks near the bell housing – A worn 4657.174.042 coupling can degrade the seal surface, causing transmission fluid to escape and leading to low fluid levels.
- Vibration during gear engagement – When the coupling’s damping material fatigues, operators often feel excessive shudder or shake when shifting from neutral to drive.
- Metallic clicking or clunking – Broken coupling teeth or splines produce audible noise under acceleration or deceleration, especially in WG 190 and WG 210 units.
- Erratic gear slipping under load – A failing coupling disrupts torque flow, causing intermittent loss of power transfer during uphill climbs or heavy hauling.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4657.174.042 |
| Material | High-strength alloy steel with rubber damping insert |
| Outer Diameter | 210 mm (estimated) |
| Inner Diameter | 65 mm (estimated) |
| Weight | 3.2 kg (estimated) |
| OEM Reference | ZF 4657.174.042 |
| Torque Capacity | Up to 1,200 Nm (estimated) |
Compatibility
This coupling is designed for the ZF WG 190 and ZF WG 210 transmission families, commonly found in medium-duty trucks, buses, and off-highway equipment. It also fits select variants of the WG 180 and WG 200 series when used with the correct 4657201166: HOUS.FRONT SECT and 4657201168: HOUSING REAR PART. Always verify your transmission model’s serial number before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101078 | TRANSMISSION HOUSING | Encloses and supports internal transmission components |
| 4657201166 | HOUS.FRONT SECT | Front section of the transmission housing, aligns with the coupling |
| 4657201168 | HOUSING REAR PART | Rear housing section that secures output shaft bearings |
| 4657298101 | HOUSING REAR SECTION | Alternate rear housing component for specific WG models |
| 0631306816 | CYLINDRICAL PIN | Precision alignment pin for housing assembly |
| 0636100801 | CAP SCREW | Fastener for securing housing sections |
| 4656301148 | FIXING PLATE | Retains coupling and prevents axial movement |
| 4657301032 | SCREEN SHEET | Filter screen for transmission oil circuit |
| 4657301033 | SCREEN SHEET | Secondary filter screen for debris protection |
| 0636100803 | CAP SCREW | Additional fastening hardware for housing integrity |
Frequently Asked Questions
Q: Can the 4657.174.042 coupling be used in a ZF WG 200 transmission?
A: Yes, it is compatible with WG 200 models when paired with the correct 4657298101: HOUSING REAR SECTION. Always cross-reference your transmission’s part list to confirm fitment.
Q: What causes premature failure of this coupling?
A: Common causes include misalignment during installation, excessive engine torque spikes, and contamination from worn clutch debris. Replacing the 4656301148: FIXING PLATE at the same time is recommended to ensure proper retention.
Q: How do I verify the coupling is OEM genuine?
A: Check for the ZF logo and the engraved part number 4657.174.042 on the metal hub. Genuine parts also include a laser-etched batch code for traceability.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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