Overview
The ZF 4642.151.203 CLUTCH is a critical internal component engineered specifically for the WG 150 series transmission. This OEM genuine part functions as the primary torque-transfer interface, engaging and disengaging power flow between the engine and the gearbox. Positioned within the clutch pack assembly, the SKU 4642.151.203 ensures precise hydraulic actuation and reliable load holding under heavy industrial conditions. Without this clutch, the transmission cannot shift smoothly or maintain drive torque, making it essential for operational uptime in construction and material handling equipment.
Symptoms of Failure
- Delayed engagement or clutch slipping under load: When the 4642.151.203 wears, operators notice hesitation when shifting from neutral to drive, especially on inclines. This “ZF WG150 clutch slipping” symptom often worsens with heat.
- Erratic shift quality and harsh engagement: A failing clutch causes abrupt or jerky gear changes, frequently described as “transmission shudder” during low-speed maneuvering.
- Low transmission fluid pressure warnings: Internal leakage past the worn clutch piston reduces system pressure, triggering dashboard alerts and requiring immediate inspection of the clutch assembly.
- Burning smell or discolored fluid: Excessive friction from a glazed clutch surface generates heat, producing a distinct burnt odor and darkening the transmission oil.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4642.151.203 |
| OEM Reference | ZF WG 150 Series |
| Material | Sintered bronze friction lining with steel core |
| Outer Diameter | Approx. 200 mm |
| Inner Diameter | Approx. 140 mm |
| Thickness | 4.5 mm (new) |
| Weight | 0.85 kg |
| Operating Pressure | 12–18 bar |
Compatibility
This 4642.151.203 clutch is designed primarily for the ZF WG 150 transmission, but it also fits select variants of the WG 180 and WG 200 series where clutch pack dimensions are shared. Always verify stack height and spline count before installation. For complete assembly integrity, pair this clutch with the 4642101109 TRANSMISSION HOUSING and the 4642301205 TRANSMISSION HOUSING to ensure correct alignment. Additionally, the 0730365125 TYPE PLATE provides essential identification data, while the 0631311009 GROOVED STUD secures the clutch pack during high-torque operation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101109 | TRANSMISSION HOUSING | Encloses and supports clutch assembly |
| 4642301205 | TRANSMISSION HOUSING | Alternate housing for WG series |
| 0730365125 | TYPE PLATE | Identification tag for transmission model |
| 0631311009 | GROOVED STUD | Fastens clutch pack to drum |
| 4642301168 | SCREEN SHEET | Filters debris from clutch oil flow |
| 4642301169 | SCREEN SHEET | Fine mesh filter for hydraulic circuit |
| 0636100621 | HEXAGON SCREW | Secures housing and cover plates |
| 4642301186 | SCREEN SHEET | Additional filtration for clutch pack |
| 4644106085 | SHIFT SYSTEM | Controls clutch engagement timing |
| 4642306050 | COVER PLATE | Protects clutch access opening |
