Overview
This OEM genuine ZF 4657.174.046 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 coupling absorbs torsional vibrations and ensures smooth power delivery under heavy-duty industrial loads. The SKU 4657.174.046 is manufactured to ZF’s exacting tolerances, guaranteeing a direct replacement fit without modification. When installed alongside the 4657101033: TRANSMISSION HOUSING, this coupling maintains proper alignment and reduces stress on adjacent driveline components.
Symptoms of Failure
- Audible clunking or knocking during gear engagement: Worn coupling teeth or elastomeric elements cause delayed torque transfer, producing a metallic noise when shifting from neutral to drive.
- Vibration at low RPM under load: A degraded 4657.174.046 coupling cannot dampen engine harmonics, resulting in noticeable chassis vibration between 800–1200 RPM.
- Transmission fluid seepage near the bell housing: Cracks in the coupling hub allow oil to migrate past the seal, leaving wet spots on the 4657201027: HOUS.FRONT SECT.
- Intermittent loss of power to the wheels: Slippage within the coupling assembly creates a momentary disconnect between engine and transmission, especially during uphill hauling.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4657.174.046 |
| Outer Diameter | 210 mm |
| Inner Bore Diameter | 65 mm |
| Overall Length | 95 mm |
| Material | High-tensile steel with nitrile rubber insert |
| Weight | 3.8 kg |
| OEM Reference | ZF 4657.174.046 |
| Torque Capacity | 1,200 Nm |
Compatibility
This coupling is designed for ZF WG 190 and WG 210 series transmissions used in municipal trucks, fire apparatus, and construction equipment. It also fits select WG 180 and WG 200 models when paired with the correct 4657201012: HOUSING REAR PART. Always verify your transmission model code before ordering. For precise alignment during installation, use a 0631306792: CYLINDRICAL PIN to secure the coupling to the flywheel.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101033 | TRANSMISSION HOUSING | Encloses gear train and supports bearing loads |
| 4657201027 | HOUS.FRONT SECT | Front section housing for input shaft and pump |
| 4657201012 | HOUSING REAR PART | Rear section housing for output shaft and PTO |
| 0631306792 | CYLINDRICAL PIN | Alignment pin for coupling-to-flywheel fit |
| 0636100801 | CAP SCREW | M10 bolt for securing housing sections |
| 4656301148 | FIXING PLATE | Locks coupling hub to shaft |
| 4657301032 | SCREEN SHEET | Fine mesh filter for oil return circuit |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter for suction line |
| 0636100803 | CAP SCREW | M12 bolt for bell housing attachment |
| 4681301040 | OIL FEED.HOUSG. | Distributes pressurized oil to clutch pack |
Frequently Asked Questions
Q: Can I use the 4657.174.046 coupling on a WG 200 transmission?
A: Yes, this coupling is compatible with WG 200 models when the transmission is equipped with the correct flywheel housing. Always cross-reference your serial number with ZF’s application guide.
Q: What torque should I apply to the cap screws when installing this coupling?
A: Use 85 Nm for M10 cap screws (part 0636100801) and 120 Nm for M12 cap screws (part 0636100803). Lubricate threads lightly with threadlocker.
Q: How do I know if my coupling has failed internally without removing it?
A: Measure axial play at the coupling hub using a dial indicator. If play exceeds 0.5 mm, replacement is necessary to prevent damage to the housing rear part.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
Request a Quote →
