Overview
The ZF 4642.056.031 6 WG 150 Powershift Transmission Assembly is a complete, factory-grade unit designed for heavy-duty off-highway machinery. This assembly integrates the full gear train, clutch packs, and hydraulic control system into a single, ready-to-install package. As a core component of the WG 150 series, it manages torque distribution across six forward speeds, ensuring smooth power delivery under extreme loads. The SKU 4642.056.031 is a direct replacement for worn or failed assemblies, eliminating the need for piecemeal repairs. This unit sits at the heart of the driveline, connecting directly to the engine via the TRANSMISSION HOUSING (4642101109) and the TRANSMISSION HOUSING (4642301205), which provide structural integrity and oil routing.
Symptoms of Failure
- Erratic gear engagement or slipping under load: When the internal clutch packs or valve body wear, the transmission may hesitate or slip during shifts, particularly in higher gears. This often manifests as a loss of traction on inclines.
- External oil leaks from the main case: Cracks or seal degradation in the assembly can cause hydraulic fluid to weep from the bell housing or output flange area, leading to low pressure and overheating.
- Delayed or harsh shifting: A failing shift system or worn planetary gears can cause abrupt engagement or a noticeable lag between gear changes, often accompanied by a metallic grinding noise.
- Overheating and burnt fluid odor: Internal friction from failing bearings or clutch discs generates excessive heat, which degrades the transmission oil and produces a distinct burnt smell.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number / SKU | 4642.056.031 |
| Assembly Type | Complete Powershift Transmission |
| Series | WG 150 |
| Number of Speeds | 6 Forward / 1 Reverse |
| Estimated Dry Weight | 185 kg (408 lbs) |
| Overall Length | 720 mm |
| Overall Width | 480 mm |
| Overall Height | 510 mm |
| Housing Material | Cast Iron (GGG-40) |
| OEM Reference | ZF 6 WG 150 |
| Max Input Torque | 1,500 Nm |
| Oil Capacity | ~22 Liters |
Compatibility
This complete assembly is specifically engineered for the ZF WG 150 series. It is compatible with all variants of the WG 150, including models used in wheel loaders, telehandlers, and industrial tractors. While the WG 150 shares a common architecture with the larger WG 180 and WG 200 series, the 4642.056.031 unit is not directly interchangeable with those higher-torque models without significant modifications to the TYPE PLATE (0730365125) and mounting hardware. The assembly also integrates with the GROOVED STUD (0631311009) for precise alignment during installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101109 | TRANSMISSION HOUSING | Main structural case for gear support |
| 4642301205 | TRANSMISSION HOUSING | Secondary housing for oil distribution |
| 0730365125 | TYPE PLATE | Identification tag for model specs |
| 0631311009 | GROOVED STUD | Alignment dowel for housing assembly |
| 4642301168 | SCREEN SHEET | Fine mesh filter for hydraulic fluid |
| 4642301169 | SCREEN SHEET | Coarse mesh pre-filter for sump |
| 0636100621 | HEXAGON SCREW | Fastener for cover plate retention |
| 4642301186 | SCREEN SHEET | Secondary filter for clutch circuit |
| 4644106300 | SHIFT SYSTEM | Valve body for gear selection |
| 4644306500 | COVER PLATE | Access panel for shift system |
