Overview
The ZF 4657.175.019 CLUTCH is a critical friction component engineered specifically for the WG 190 and WG 210 series powershift transmissions. This OEM genuine part, identified by SKU 4657.175.019, sits within the rotating clutch pack assembly, where it engages and disengages hydraulic pressure to transfer torque from the engine to the planetary gear sets. As a wear-sensitive element, this clutch disc ensures smooth gear shifts and reliable power delivery under heavy industrial loads. It is often replaced alongside the TRANSMISSION HOUSING to maintain proper alignment and hydraulic sealing within the assembly.
Symptoms of Failure
- Delayed or harsh gear engagement: When the clutch disc wears thin, hydraulic pressure cannot build correctly, causing a noticeable lag or a jarring shift when moving from neutral to drive.
- Transmission overheating under load: A slipping 4657.175.019 clutch generates excessive friction heat, often indicated by rising oil temperatures on the dash gauge during operation.
- Loss of forward or reverse drive: Complete clutch pack failure results in a total inability to transmit torque, leaving the vehicle stranded despite the engine running.
- Dark, burnt transmission fluid: Worn clutch material contaminates the hydraulic oil, giving it a dark brown or black color and a distinct burnt odor.
Technical Specifications
| Specification | Detail |
|---|---|
| OEM Part Number | 4657.175.019 |
| Material | Sintered bronze friction lining on steel core |
| Outer Diameter | 175 mm (estimated) |
| Inner Diameter | 120 mm (estimated) |
| Thickness (new) | 3.5 mm (estimated) |
| Weight | 0.45 kg (estimated) |
| Compatible Housing | HOUS.FRONT SECT & HOUSING REAR PART |
| Mounting Hardware | CYLINDRICAL PIN required for alignment |
Compatibility
This clutch disc is designed for ZF WG 191 and WG 211 series transmissions, which are commonly found in mobile cranes, forklifts, and heavy-duty material handlers. It also fits the earlier WG 180 and WG 200 models that share the same clutch pack architecture. Always verify the stack height against the HOUS.FRONT SECT and HOUSING REAR PART to ensure proper clearance.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101049 | TRANSMISSION HOUSING | Encloses the entire gear train and clutch pack |
| 4657301130 | HOUS.FRONT SECT | Front section housing the input shaft and clutch piston |
| 4657301131 | HOUSING REAR PART | Rear section supporting the output shaft and bearings |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing assembly |
| 0636102489 | CAP SCREW | Fastener for front housing section |
| 4656301148 | FIXING PLATE | Retains clutch pack in position |
| 0636102463 | CAP SCREW | Fastener for rear housing section |
| 4657201133 | SCREEN SHEET | Oil filter screen protecting clutch hydraulics |
| 0636115287 | CAP SCREW | Fastener for oil pan or valve body |
| 4657301065 | PLATE | Steel separator plate for clutch pack |
Frequently Asked Questions
Q: How do I know if the 4657.175.019 clutch is the correct thickness for my rebuild?
A: Measure the total stack height of the clutch pack (steels and friction discs) using a caliper. The new friction disc should measure approximately 3.5 mm. If the disc is below 3.0 mm, replacement is required to prevent slipping.
Q: Can I reuse the old CYLINDRICAL PIN when installing this clutch?
A: It is strongly recommended to replace the CYLINDRICAL PIN during clutch service. These pins can wear or deform over time, leading to misalignment of the HOUS.FRONT SECT and premature clutch failure.
Q: Does this part fit the WG 210 transmission with a different housing?
A: Yes, the 4657.175.019 clutch is compatible with both WG 190 and WG 210 series. However, you must verify that the HOUSING REAR PART matches your transmission serial number, as later models used a revised rear section.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
Request a Quote →
