Overview
The ZF 4642.054.050 4 WG 150 Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty off-highway machinery. As the core hydraulic-mechanical assembly in the WG 150 Series, this unit integrates the clutch packs, planetary gear sets, and valve body into a single, ready-to-install package. The SKU 4642.054.050 is the direct replacement for the original equipment assembly, ensuring precise gear engagement and torque distribution in wheel loaders, dozers, and graders. This complete assembly eliminates the need for piecemeal rebuilding, reducing downtime during major transmission overhauls.
Symptoms of Failure
- Delayed or harsh engagement when shifting from forward to reverse: A worn 4642.054.050 assembly often causes a noticeable lag or a jarring clunk during directional changes, indicating internal clutch pack wear.
- Loss of power under load with transmission overheating: If the machine struggles to climb grades or push material, and the transmission temperature spikes, the internal seals and clutches within this assembly are likely slipping.
- Visible hydraulic oil leaks around the main case joint: Cracks or gasket failures in the assembly housing lead to external fluid loss, often seen as drips near the bell housing or PTO area.
- Erratic shifting or failure to engage a specific gear range: When the transmission jumps out of gear or refuses to shift into 2nd or 3rd, the internal valve body or clutch piston within the 4642.054.050 is failing.
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Part Number | 4642.054.050 |
| Series | WG 150 (4-Speed Powershift) |
| Assembly Type | Complete Transmission Unit (with clutches & valve body) |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Housing Material | High-Grade Cast Iron (GGG-40) |
| Input Torque Capacity | 1,500 Nm (1,106 lb-ft) |
| Overall Length (approx.) | 720 mm |
| OEM Reference | ZF 4 WG 150 |
Compatibility
This complete assembly is engineered specifically for the ZF WG 150 Series powershift transmissions. While the 4642.054.050 is a direct fit for the 4 WG 150 model, it shares core architecture with the WG 180 and WG 200 series. It is commonly used in Volvo L90/L110 wheel loaders, Case 921C machines, and Kawasaki 90ZV loaders. Always verify the serial number range of your transmission to confirm compatibility, as internal clutch count variations exist between early and late production units.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101109 | TRANSMISSION HOUSING | Main structural case for the gear train |
| 4642301205 | TRANSMISSION HOUSING | Rear housing section for output shaft support |
| 0730365125 | TYPE PLATE | Identification plate with serial number |
| 0631311009 | GROOVED STUD | Alignment stud for housing assembly |
| 4642301168 | SCREEN SHEET | Fine mesh filter for oil return circuit |
| 4642301169 | SCREEN SHEET | Coarse mesh pre-filter for pump suction |
| 0636100621 | HEXAGON SCREW | M10 mounting bolt for housing flanges |
| 4642301186 | SCREEN SHEET | Magnetic screen for clutch debris |
| 4644106324 | SHIFT SYSTEM | Electro-hydraulic shift control module |
| 4644306598 | PLATE | Clutch piston backing plate |
