Overview
The ZF 4657.175.018 CLUTCH is a critical friction component engineered for the WG 190 and WG 210 series powershift transmissions. This OEM genuine part serves as the primary torque-transfer interface between the engine and the gear train, engaging and disengaging power flow during gear shifts. Located within the main transmission housing, the clutch assembly (SKU: 4657.175.018) is responsible for smooth modulation of hydraulic pressure to drive the planetary gear sets. When installed correctly, it ensures precise shift timing and maximum power delivery under heavy industrial loads. This component is frequently replaced alongside the TRANSMISSION HOUSING and the HOUS.FRONT SECT to maintain complete hydraulic integrity.
Symptoms of Failure
- Delayed or harsh gear engagement: When the clutch pack wears, hydraulic pressure bleeds past the seals, causing a noticeable lag when shifting from neutral to drive or between forward gears.
- Transmission oil overheating: Slipping friction discs generate excessive heat, leading to elevated sump temperatures and degraded fluid viscosity.
- Intermittent power loss under load: Worn clutch plates fail to lock fully, resulting in momentary torque loss when climbing grades or moving heavy payloads.
- Metallic debris in the oil pan: Friction material shedding from the 4657.175.018 clutch produces fine metallic particles that contaminate the hydraulic circuit and can damage the CYLINDRICAL PIN and valve body components.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 4657.175.018 |
| OEM Reference | ZF 4657.175.018 |
| Material | Sintered bronze friction discs with steel separator plates |
| Outer Diameter | 175 mm (estimated) |
| Inner Diameter | 120 mm (estimated) |
| Total Thickness (pack) | 38 mm (estimated) |
| Weight | 1.8 kg (estimated) |
| Operating Pressure | 18–22 bar |
Compatibility
This clutch assembly is specifically designed for the ZF WG 191 and WG 211 series transmissions. It is also compatible with the WG 180, WG 190, WG 200, and WG 210 models used in construction equipment, agricultural tractors, and material handlers. The 4657.175.018 replaces earlier clutch variants in these platforms and requires proper alignment with the HOUSING REAR PART for correct piston travel. Always verify your transmission serial number before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101049 | TRANSMISSION HOUSING | Encloses and supports all gear train components |
| 4657301130 | HOUS.FRONT SECT | Front section housing for input shaft and clutch pack |
| 4657301131 | HOUSING REAR PART | Rear section housing for output shaft and planetary gears |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing assembly |
| 0636102489 | CAP SCREW | Fastener for clutch pack retention |
| 4656301148 | FIXING PLATE | Secures clutch pack to the hub |
| 0636102463 | CAP SCREW | Bolt for housing flange connection |
| 4657201133 | SCREEN SHEET | Filter screen for hydraulic oil return |
| 0636115287 | CAP SCREW | Fastener for valve body mounting |
| 4657301065 | PLATE | Backing plate for clutch piston |
Frequently Asked Questions
Q: How do I know if the 4657.175.018 clutch is the correct replacement for my WG 210?
A: Verify your transmission model tag. This clutch fits WG 191 and WG 211 series, and also WG 180, 190, 200, and 210 units. If your transmission has a 175mm clutch pack diameter, this is the correct part.
Q: Can I install this clutch without replacing the housing components?
A: While possible, we strongly recommend inspecting the HOUS.FRONT SECT and HOUSING REAR PART for wear. Worn housing bores can cause premature clutch failure.
Q: What torque specification should I use for the cap screws during installation?
A: Use 45 Nm for the CAP SCREW (0636102489) and 55 Nm for the CAP SCREW (0636102463). Always consult the ZF service manual for your specific model.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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