Overview
The ZF 4642.056.018 6 WG 150 Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty off-highway applications. This assembly integrates the planetary gear sets, clutch packs, and hydraulic control system into a single, ready-to-install package. As the core of the WG 150 series, it manages torque distribution across six forward speeds, enabling smooth power shifts under load. The SKU 4642.056.018 is a direct replacement for original equipment, ensuring precise alignment with the TRANSMISSION HOUSING and the TRANSMISSION HOUSING to maintain structural integrity during high-torque operations.
Symptoms of Failure
- Erratic gear engagement under load: When the assembly wears, operators may experience delayed or harsh shifting, particularly when transitioning from forward to reverse. This often manifests as a “clunk” during directional changes.
- Hydraulic oil contamination: Internal seal degradation allows debris to circulate, leading to clogged filter screens. You may notice metallic particles in the oil pan, indicating clutch pack wear.
- Torque converter shudder: A vibration at low engine RPMs during acceleration suggests worn stator bearings or damaged one-way clutches within the assembly.
- Intermittent loss of drive: The transmission may suddenly disengage power to the wheels, especially after extended operation in high-temperature environments, pointing to hydraulic pressure loss.
Technical Specifications
| Parameter | Specification |
|---|---|
| Assembly Weight | 185 kg (408 lbs) |
| Overall Length | 720 mm |
| Overall Width | 480 mm |
| Overall Height | 410 mm |
| Housing Material | Cast Iron (GGG-40) |
| OEM Reference | ZF 4642.056.018 |
| Torque Capacity | 1,500 Nm (1,106 lb-ft) |
| Speed Range | 6 Forward / 1 Reverse |
| Hydraulic Pressure | 18–22 bar (261–319 psi) |
Compatibility
This complete unit is engineered for the ZF WG 150 series, but its core architecture shares components with larger models. It is directly compatible with the WG 150, WG 151, and WG 152 transmissions. The assembly also fits select WG 180 and WG 200 variants when used with the appropriate TYPE PLATE for identification. For proper mounting, ensure the GROOVED STUD is installed to secure the housing alignment. Applications include wheel loaders, forklifts, and telescopic handlers from manufacturers like Liebherr, Volvo, and JCB.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101109 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4642301205 | TRANSMISSION HOUSING | Secondary housing for clutch pack assembly |
| 0730365125 | TYPE PLATE | Identification plate with serial number |
| 0631311009 | GROOVED STUD | Alignment pin for housing mating |
| 4642301168 | SCREEN SHEET | Fine mesh filter for hydraulic oil |
| 4642301169 | SCREEN SHEET | Coarse mesh pre-filter for sump |
| 0636100621 | HEXAGON SCREW | M12 bolt for housing fastening |
| 4642301186 | SCREEN SHEET | High-flow filter for cooler return line |
| 4644106300 | SHIFT SYSTEM | Hydraulic valve body for gear selection |
| 4644306500 | COVER PLATE | Access cover for clutch pack inspection |
