Overview
The ZF 4657.274.018 CLUTCH is a critical torque-transfer component engineered specifically for the WG 190, WG 210, and related series of heavy-duty industrial transmissions. Positioned within the planetary gear set assembly, this OEM genuine part engages and disengages power flow between the input shaft and the gear train, enabling smooth gear shifts under high load conditions. The SKU 4657.274.018 is manufactured to ZF’s exacting tolerances, ensuring precise hydraulic actuation and minimal drag in neutral. This clutch assembly works in concert with the 4657101085: TRANSMISSION HOUSING to maintain structural alignment and oil distribution, while the 4657201161: HOUS.FRONT SECT provides the forward mounting interface for the clutch pack.
Symptoms of Failure
- Delayed or harsh engagement – When the 4657.274.018 clutch wears, operators often notice a lag between shifting and actual gear engagement, followed by a jarring lock-up. This is a common symptom in WG 210 transmissions operating under heavy torque.
- Transmission fluid overheating – A slipping clutch generates excessive friction, causing the oil temperature to rise rapidly. If your ZF WG 190 unit shows persistent overheating without external leaks, inspect this clutch assembly.
- Intermittent loss of drive in forward gears – Worn friction discs within the 4657.274.018 can cause the transmission to momentarily lose power, particularly when climbing or under load. This failure is frequently misdiagnosed as a valve body issue.
- Metallic debris in the oil pan – As the clutch material degrades, fine metallic particles contaminate the hydraulic fluid. This debris can also clog the 4657301032: SCREEN SHEET and 4657301033: SCREEN SHEET, accelerating wear on other components.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number / SKU | 4657.274.018 |
| OEM Reference | ZF 4657.274.018 |
| Material | Sintered bronze friction discs with steel separator plates |
| Outer Diameter | 180 mm (estimated) |
| Inner Diameter | 120 mm (estimated) |
| Total Thickness (pack) | 42 mm (estimated) |
| Weight | 2.8 kg (6.2 lbs) |
| Hydraulic Pressure Range | 12–18 bar |
| Operating Temperature | -20°C to +120°C |
Compatibility
This ZF 4657.274.018 CLUTCH is designed for use in the following transmission model series: WG 180, WG 190, WG 191, WG 200, WG 210, WG 211, and WG 230. It is a direct replacement for the original clutch pack in both standard and high-torque variants. The assembly is compatible with transmissions that utilize the 4657201162: HOUSING REAR PART and the 4657298107: HOUSING REAR SECTION for proper end-play adjustment. Always verify the clutch stack height against your transmission’s service manual before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101085 | TRANSMISSION HOUSING | Main structural casing that supports the clutch assembly and oil galleries |
| 4657201161 | HOUS.FRONT SECT | Forward housing section that aligns the input shaft and clutch drum |
| 4657201162 | HOUSING REAR PART | Rear housing component that contains the output shaft bearing |
| 4657298107 | HOUSING REAR SECTION | End cover that seals the transmission and provides PTO mounting points |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for precise housing-to-clutch positioning |
| 0636100801 | CAP SCREW | M10 fastener securing the clutch pack retaining plate |
| 4656301148 | FIXING PLATE | Steel plate that locks the clutch piston in place |
| 4657301032 | SCREEN SHEET | Fine mesh filter protecting the clutch control valve |
| 4657301033 | SCREEN SHEET | Secondary filter for the lubrication circuit |
| 0636100803 | CAP SCREW | M8 bolt for the screen sheet retaining bracket |
Frequently Asked Questions
Q: Can the 4657.274.018 clutch be rebuilt, or must it be replaced as a unit?
A: While individual friction discs can theoretically be replaced, ZF recommends installing the complete 4657.274.018 assembly to ensure proper stack height and hydraulic balance. Reusing worn steel plates often leads to premature failure.
Q: How do I know if my WG 210 transmission needs this specific clutch?
A: If you have verified that the transmission housing (4657101085) and front section (4657201161) are intact, and you are experiencing the symptoms listed above, the 4657.274.018 is the likely culprit. A pressure test at the clutch feed port should show below-spec values.
Q: Is this part interchangeable between WG 190 and WG 230 models?
A: Yes, the 4657.274.018 clutch is physically identical across the WG 190, WG 210, and WG 230 series. However, always check the number of friction plates in your original pack, as some high-torque variants use an additional disc.
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Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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