Overview
The ZF 4651.151.004 CLUTCH is a critical torque-transfer component engineered specifically for the WG 100 and WG 110 series transmissions. This OEM genuine part sits within the planetary gear set assembly, where it engages and disengages power flow between the input shaft and the main drive train. Designed to withstand high cyclic loads and thermal stress, the SKU 4651.151.004 ensures precise hydraulic actuation and positive lock-up during gear shifts. When paired with a properly sealed 4651101009: TRANSMISSION HOUSING, this clutch maintains the structural integrity required for heavy-duty industrial applications.
Symptoms of Failure
- Delayed or harsh gear engagement: When the clutch pack wears, you may notice a pronounced lag or a jarring shift when moving from neutral to drive, indicating insufficient clamping force.
- Transmission fluid contamination: Friction material shedding from the 4651.151.004 clutch can cause dark, burnt-smelling oil, often accompanied by metallic particles in the sump.
- Torque converter shudder: A vibration or shudder during low-speed acceleration suggests the clutch is slipping under load, failing to maintain a solid mechanical lock.
- Intermittent loss of forward motion: As the clutch discs degrade, the transmission may momentarily lose drive power, especially on inclines or under heavy payload conditions.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4651.151.004 |
| OEM Reference | ZF 4651.151.004 |
| Outer Diameter | 180 mm (estimated) |
| Inner Diameter | 120 mm (estimated) |
| Thickness (packed) | 35 mm (estimated) |
| Material | Sintered bronze friction discs with steel separator plates |
| Weight | 2.4 kg (estimated) |
| Operating Pressure | 12–16 bar |
| Max Torque Capacity | 1,200 Nm (estimated) |
Compatibility
This clutch is primarily designed for the ZF WG 100 and WG 110 transmission series, commonly found in municipal trucks, refuse vehicles, and medium-duty construction equipment. It is also compatible with the WG 180 and WG 200 series when used with the correct 4651301025: HOUSING adapter. For proper sealing, always replace the 0634303928: O-RING during installation. In WG 200 applications, the 4651301031: HOUSING may be required to accommodate the clutch stack height.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4651101009 | TRANSMISSION HOUSING | Encloses the gear train and clutch assembly |
| 4651301025 | HOUSING | Adapter housing for clutch pack alignment |
| 0634303928 | O-RING | Seals hydraulic pressure passages |
| 4651301031 | HOUSING | Alternate housing for WG 200 series |
| 4651203002 | SCREEN SHEET | Filters debris from clutch hydraulic circuit |
| 4651303005 | SCREEN SHEET | Secondary filtration for oil return line |
| 0636101032 | CAP SCREW | Fastens clutch pack retaining plate |
| 0630361028 | SEALING CAP | Protects clutch piston bore from contamination |
| 4475280060 | SCREW PLUG | Closes hydraulic test ports |
| 0634303312 | O-RING | Seals screw plug and cap interfaces |
