Overview
The ZF 4657.175.042 CLUTCH is a critical friction component engineered for the WG 190 and WG 210 series powershift transmissions. This OEM genuine part sits within the planetary gear set assembly, where it manages torque transfer between rotating shafts and stationary housing elements. When hydraulic pressure engages this clutch pack, it locks specific gear elements to deliver smooth, reliable shifting under heavy load conditions. The SKU 4657.175.042 is precision-machined to OEM tolerances, ensuring consistent clamping force and heat dissipation during high-cycle operations in construction and agricultural machinery.
Symptoms of Failure
- Delayed engagement or gear slipping under load — When the friction material wears thin, the clutch cannot hold torque, causing the transmission to slip during acceleration or uphill operation.
- Erratic shifting or harsh engagement — Worn clutch plates create inconsistent hydraulic pressure buildup, leading to jarring shifts or unexpected gear changes.
- Dark, burnt transmission fluid with metallic particles — Overheated friction material contaminates the oil, producing a distinct burnt odor and visible debris in the fluid.
- Loss of power in specific gear ranges — If the 4657.175.042 clutch fails in a particular planetary set, the machine may lose forward or reverse drive in certain speed ranges.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4657.175.042 |
| Type | Friction Clutch Pack |
| Outer Diameter | 175 mm (estimated) |
| Inner Diameter | 120 mm (estimated) |
| Thickness (assembled) | 42 mm (estimated) |
| Material | Sintered Bronze Friction Lining on Steel Core |
| Weight | 1.8 kg (estimated) |
| OEM Reference | ZF 4657.175.042 |
| Operating Pressure | 12–18 bar |
Compatibility
This clutch is specifically designed for ZF WG 191 and WG 211 series transmissions, which are commonly found in telehandlers, wheel loaders, and dump trucks. It is also compatible with the WG 180, WG 190, WG 200, and WG 210 models that share the same planetary gear architecture. Always verify the transmission serial number before installation to ensure correct fitment.
Installation Context
During a clutch replacement, the TRANSMISSION HOUSING (4657101087) must be inspected for wear at the bore surfaces where the clutch pack seats. The HOUS.FRONT SECT (4657301172) and HOUSING REAR PART (4657301173) should be checked for cracks or distortion, as these components align the clutch pack with the input shaft. Additionally, the CYLINDRICAL PIN (0631306816) must be replaced to ensure precise dowel alignment during reassembly. Proper torque on all fasteners prevents fluid leaks and premature clutch failure.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101087 | TRANSMISSION HOUSING | Encloses and supports all internal transmission components |
| 4657301172 | HOUS.FRONT SECT | Front section housing that aligns the clutch pack with the input shaft |
| 4657301173 | HOUSING REAR PART | Rear section housing that supports the output shaft and planetary gears |
| 0631306816 | CYLINDRICAL PIN | Dowel pin for precise alignment of housing sections |
| 0636102489 | CAP SCREW | Fastener for securing housing sections |
| 4656301148 | FIXING PLATE | Retains clutch pack in position within the housing |
| 0636102463 | CAP SCREW | Fastener for fixing plate attachment |
| 4657201133 | SCREEN SHEET | Filter screen protecting hydraulic circuits from debris |
| 0636115287 | CAP SCREW | Fastener for screen sheet mounting |
| 4657301065 | PLATE | Spacer or backing plate for clutch pack assembly |
