Overview
The ZF 4657.176.035 CLUTCH is a critical internal component engineered specifically for the WG 190 and WG 210 series transmissions. This OEM genuine part functions as the primary torque transfer element within the planetary gear set, engaging and disengaging power flow between the input shaft and the output assembly. The SKU 4657.176.035 is designed to withstand high cyclic loads and thermal stress, ensuring precise shift timing in heavy-duty industrial applications. When installed, this clutch works in direct conjunction with the TRANSMISSION HOUSING to maintain proper alignment and oil circulation within the clutch pack.
Symptoms of Failure
- Delayed or harsh gear engagement: When the 4657.176.035 clutch wears, operators often notice a lag between shifting and actual gear engagement, accompanied by a jarring sensation as the clutch plates slip before locking.
- Transmission overheating under load: A failing clutch generates excessive friction, causing the transmission fluid to overheat rapidly during normal operation, particularly in WG 191 and WG 211 series units.
- Metallic debris in the oil pan: Worn clutch material sheds fine metallic particles that contaminate the hydraulic fluid, often visible during routine oil changes as a grayish sludge.
- Intermittent loss of drive in forward gears: The clutch may fail to hold pressure, resulting in sudden power loss that temporarily resolves after the transmission cools down.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4657.176.035 |
| Outer Diameter | 176 mm |
| Inner Diameter | 35 mm |
| Friction Plate Thickness | 2.5 mm |
| Material | Sintered bronze on steel core |
| Weight | 0.85 kg |
| OEM Reference | ZF 4657.176.035 |
| Operating Pressure | 12-16 bar |
Compatibility
This clutch is directly compatible with ZF WG 190 and WG 210 series transmissions, including the WG 191 and WG 211 sub-variants. It also fits select WG 180 and WG 200 models where the clutch pack configuration matches the 176 mm outer diameter. For proper installation, the HOUS.FRONT SECT and HOUSING REAR PART must be inspected for wear, as these components directly support the clutch drum. Additionally, the CYLINDRICAL PIN should be replaced simultaneously to ensure correct alignment during reassembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101087 | TRANSMISSION HOUSING | Encloses and supports all internal transmission components |
| 4657301172 | HOUS.FRONT SECT | Front section of the housing that aligns the clutch drum |
| 4657301173 | HOUSING REAR PART | Rear housing section that seals the clutch pack area |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for precise clutch assembly positioning |
| 0636102489 | CAP SCREW | Secures the housing sections together |
| 4656301148 | FIXING PLATE | Locks the clutch pack in place |
| 0636102463 | CAP SCREW | Fastener for the fixing plate |
| 4657201133 | SCREEN SHEET | Filters debris from clutch hydraulic circuit |
| 0636115287 | CAP SCREW | Mounting bolt for the screen sheet |
| 4657301065 | PLATE | Backing plate for clutch piston |
