Overview
The ZF 4657.275.012 CLUTCH is a critical torque-transfer component engineered specifically for the WG 190, WG 191, WG 210, and WG 211 series transmissions. Positioned within the hydraulic control circuit, this genuine OEM clutch assembly engages and disengages gear sets to facilitate smooth shifting under heavy industrial loads. The SKU 4657.275.012 serves as a direct replacement for worn units, ensuring that the transmission maintains its original clamping force and shift timing. This part works in concert with the TRANSMISSION HOUSING to contain hydraulic pressure and with the HOUS.FRONT SECT to align the clutch pack precisely.
Symptoms of Failure
- Delayed or harsh engagement – When the 4657.275.012 clutch wears, operators notice a lag between gear selection and actual movement, often accompanied by a jarring shift.
- Torque loss under load – A failing clutch slips during acceleration, causing the transmission to lose power transfer, especially on inclines or with heavy payloads.
- Oil contamination with friction material – Worn clutch plates shed debris into the hydraulic fluid, which can clog the CYLINDRICAL PIN passages and reduce overall system pressure.
- Erratic shifting patterns – The transmission may hunt between gears or refuse to shift entirely, indicating that the clutch pack is no longer holding consistent pressure.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4657.275.012 |
| Material | Sintered steel friction discs with steel separator plates |
| Outer Diameter | 180 mm (estimated) |
| Inner Diameter | 120 mm (estimated) |
| Total Thickness (pack) | 45 mm (estimated) |
| Weight | 2.8 kg (estimated) |
| OEM Reference | ZF 4657.275.012 |
Compatibility
This clutch assembly is designed for ZF WG-series transmissions, including the WG 180, WG 190, WG 191, WG 200, WG 210, and WG 211 models. It is also compatible with select variants of the WG 220 series that share the same hydraulic clutch pack architecture. The 4657.275.012 interfaces directly with the HOUSING REAR PART to complete the clutch drum assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101033 | TRANSMISSION HOUSING | Encloses the entire gear train and clutch assembly |
| 4657201027 | HOUS.FRONT SECT | Front section that aligns the input shaft and clutch |
| 4657201012 | HOUSING REAR PART | Rear section supporting the output shaft and clutch drum |
| 0631306792 | CYLINDRICAL PIN | Locates and secures housing components during assembly |
| 0636100801 | CAP SCREW | Fastens the clutch pack retaining plate |
| 4656301148 | FIXING PLATE | Holds the clutch pack in position within the drum |
| 4657301032 | SCREEN SHEET | Filters debris from clutch hydraulic feed |
| 4657301033 | SCREEN SHEET | Secondary filtration for clutch oil circuit |
| 0636100803 | CAP SCREW | Secures the housing front section to the main case |
| 4681301040 | OIL FEED.HOUSG. | Directs pressurized oil to the clutch piston |
Frequently Asked Questions
Q: How do I know if the 4657.275.012 clutch is the correct replacement for my WG 210 transmission?
Verify your transmission model plate; if it lists WG 190, WG 191, WG 210, or WG 211, this clutch is compatible. Always inspect the clutch pack thickness and spline count before installation.
Q: Can I replace just the friction discs instead of the entire clutch assembly?
While individual discs are available, ZF recommends replacing the complete 4657.275.012 assembly to ensure uniform wear characteristics and proper hydraulic clearance.
Q: What other parts should I inspect when replacing this clutch?
Examine the CYLINDRICAL PIN for wear and replace the SCREEN SHEET filters to prevent debris from damaging the new clutch pack.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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