Overview
This OEM genuine ZF 4657.173.019 COUPLING is a critical torque-transfer component engineered specifically for the WG 190 and WG 210 series transmissions. Positioned between the engine flywheel and the transmission input shaft, this coupling absorbs torsional vibrations and ensures smooth power delivery under heavy industrial loads. As a direct OEM replacement, the SKU 4657.173.019 guarantees exact fitment and durability, eliminating the guesswork of aftermarket alternatives. When installed alongside the 4657101033: TRANSMISSION HOUSING, it forms the backbone of the driveline assembly, maintaining precise alignment and reducing stress on adjacent components.
Symptoms of Failure
- Transmission shudder during acceleration: A worn 4657.173.019 coupling causes noticeable vibration or jerking when shifting from a stop, especially under load. This is often misdiagnosed as a torque converter issue.
- Oil leaks near the bell housing: Degraded seals within the coupling allow transmission fluid to escape, leaving puddles under the vehicle. Search for “ZF WG190 oil leak bell housing” to identify this symptom.
- Metallic rattling at idle: Loose or fatigued coupling elements produce a distinct clattering noise, particularly in neutral. This indicates imminent failure and requires immediate inspection.
- Delayed or harsh engagement: As the coupling loses its damping ability, gear engagement becomes abrupt, leading to driveline shock and accelerated wear on the 4657201027: HOUS.FRONT SECT.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4657.173.019 |
| Outer Diameter | 210 mm (estimated) |
| Inner Diameter | 65 mm (estimated) |
| Material | High-strength alloy steel with rubber damping element |
| Weight | 3.2 kg (estimated) |
| OEM Reference | ZF 4657.173.019 |
| Torque Capacity | Up to 1,200 Nm (estimated) |
Compatibility
This coupling is designed for ZF WG 190 and WG 210 series transmissions, commonly found in municipal trucks, construction loaders, and industrial material handlers. It also fits select WG 180 and WG 200 variants where the input shaft configuration matches. For proper installation, ensure the 4657201012: HOUSING REAR PART is free of cracks and the 0631306792: CYLINDRICAL PIN is replaced to guarantee alignment. Always verify your transmission serial number against ZF’s OEM catalog before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101033 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657201027 | HOUS.FRONT SECT | Front section housing input shaft and coupling |
| 4657201012 | HOUSING REAR PART | Rear section supporting output shaft |
| 0631306792 | CYLINDRICAL PIN | Alignment dowel for housing assembly |
| 0636100801 | CAP SCREW | Fastener for coupling cover plate |
| 4656301148 | FIXING PLATE | Secures coupling to flywheel |
| 4657301032 | SCREEN SHEET | Debris filter for oil circuit |
| 4657301033 | SCREEN SHEET | Secondary debris filter (fine mesh) |
| 0636100803 | CAP SCREW | Fastener for housing sections |
| 4681301040 | OIL FEED.HOUSG. | Lubrication supply manifold |
Frequently Asked Questions
Q: Can I reuse the old cylindrical pin when installing this coupling?
A: No. ZF recommends always replacing the 0631306792: CYLINDRICAL PIN during coupling replacement to maintain precise alignment and prevent premature wear.
Q: Does this coupling fit the ZF WG 180 transmission?
A: Yes, the 4657.173.019 is compatible with WG 180 models that share the same input shaft spline count and bell housing bolt pattern as the WG 190. Always cross-reference your transmission tag.
Q: What torque should I apply to the cap screws securing this coupling?
A: Use 45 Nm for the 0636100801: CAP SCREW and 60 Nm for the 0636100803: CAP SCREW. Always follow ZF service manual torque sequences.
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Phone: +86 158 2286 3467 |
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