Overview
The ZF 4657.175.034 CLUTCH is a critical torque-transfer component engineered specifically for the WG 190 and WG 210 series transmissions. This OEM genuine part resides within the planetary gear set assembly, where it engages and disengages power flow between the input shaft and the forward clutch drum. As a friction-based element, the 4657.175.034 clutch pack ensures smooth gear engagement under heavy industrial loads. When paired with a robust 4657101049: TRANSMISSION HOUSING, this part maintains precise hydraulic pressure control, preventing premature wear in adjacent assemblies. The SKU 4657.175.034 is a direct replacement for units operating in construction and material handling equipment.
Symptoms of Failure
- Delayed or harsh gear engagement: A worn 4657.175.034 clutch causes noticeable lag when shifting from neutral to drive, often accompanied by a jarring thud as the friction plates lose grip.
- Transmission overheating under load: Slipping clutches generate excessive heat, leading to burnt transmission fluid odor and elevated temperature gauge readings during operation.
- Intermittent power loss in forward gears: Operators may experience sudden RPM flare-ups without corresponding vehicle speed increase, particularly when climbing grades or carrying rated loads.
- Metallic debris in oil pan: Visual inspection of drained fluid reveals fine metallic particles or clutch material fragments, indicating the friction lining has degraded beyond service limits.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4657.175.034 |
| OEM Reference | ZF 4657.175.034 |
| Material | Sintered bronze friction plates with steel separator discs |
| Outer Diameter | 175 mm (estimated) |
| Inner Diameter | 120 mm (estimated) |
| Total Thickness (pack) | 34 mm (estimated) |
| Weight | 1.8 kg (4.0 lbs) |
| Operating Pressure | 12–18 bar |
| Max Torque Capacity | 2,100 Nm |
Compatibility
This clutch assembly is engineered for ZF WG series transmissions, specifically the WG 190 and WG 210 models. It is also compatible with the WG 191 Series, where it functions as the primary forward clutch. The 4657.175.034 can be installed in WG 180 and WG 200 variants when used with the correct 4657301130: HOUS.FRONT SECT and 4657301131: HOUSING REAR PART. For proper alignment, always replace the 0631306816: CYLINDRICAL PIN during installation to prevent clutch pack misalignment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101049 | TRANSMISSION HOUSING | Encloses and supports all internal gear train components |
| 4657301130 | HOUS.FRONT SECT | Front section housing for clutch and pump assembly |
| 4657301131 | HOUSING REAR PART | Rear section housing for output shaft and bearings |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for clutch pack positioning |
| 0636102489 | CAP SCREW | Fastener for clutch pack retaining plate |
| 4656301148 | FIXING PLATE | Secures clutch pack to drum assembly |
| 0636102463 | CAP SCREW | Bolt for front housing attachment |
| 4657201133 | SCREEN SHEET | Filter screen for clutch hydraulic circuit |
| 0636115287 | CAP SCREW | Fastener for rear housing section |
| 4657301065 | PLATE | Backing plate for clutch piston |
