Overview
The ZF 4657.056.045 6 WG 210 Powershift Transmission Assembly | Complete Unit is a fully integrated, factory-assembled gearbox core designed for heavy-duty off-highway machinery. This complete unit serves as the primary power transfer module, converting engine torque into controlled hydraulic and mechanical output for wheel loaders, graders, and industrial tractors. The SKU 4657.056.045 denotes a specific build variant within the WG 210 series, featuring a six-speed forward and three-speed reverse configuration. It sits directly between the engine flywheel and the final drive, incorporating the torque converter, clutch packs, and planetary gear sets. For a full rebuild, the 4657101042: TRANSMISSION HOUSING provides the structural foundation, while the 4657201028: HOUS.FRONT SECT and 4657201013: HOUSING REAR PART enclose the rotating assemblies.
Symptoms of Failure
- Delayed or harsh gear engagement: When the complete unit wears, internal clutch pack clearances increase, causing a noticeable lag or jarring shift when moving from neutral to forward or reverse.
- Torque converter shudder under load: A vibrating or shuddering sensation during low-speed maneuvering indicates degraded stator or turbine components within the assembly.
- External oil seepage at housing joints: Leaks around the main case or front section gaskets suggest seal failure; the 0631306792: CYLINDRICAL PIN alignment may also be compromised, leading to misalignment and weeping.
- Loss of power in higher gears: Slipping in 4th, 5th, or 6th gear points to worn friction discs or a failing hydraulic control module inside the unit.
Technical Specifications
| Parameter | Value |
|---|---|
| Assembly Weight | Approx. 340 kg (750 lbs) |
| Overall Length | 820 mm |
| Overall Width | 510 mm |
| Overall Height | 580 mm |
| Housing Material | High-strength cast iron (GGG-40) |
| Torque Converter Diameter | 310 mm |
| OEM Reference | ZF 4657.056.045 |
| Fluid Capacity | 22 liters (SAE 10W-30 or ZF TE-ML 03) |
| Max Input Torque | 1,200 Nm |
Compatibility
This complete unit is engineered for the ZF WG 210 transmission series. It is directly compatible with the WG 180, WG 200, and WG 210 models used in Volvo, Caterpillar, and Case wheel loaders from the mid-2000s onward. The assembly also fits select ZF 6WG-210 variants found in Terex and Komatsu graders. Always verify the bellhousing pattern and output flange configuration against your machine’s serial number.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101042 | TRANSMISSION HOUSING | Main structural case for gear train |
| 4657201028 | HOUS.FRONT SECT | Front section enclosing torque converter |
| 4657201013 | HOUSING REAR PART | Rear cover supporting output shaft |
| 0631306792 | CYLINDRICAL PIN | Alignment dowel for housing mating |
| 0636100801 | CAP SCREW | Fastener for housing assembly |
| 4656301148 | FIXING PLATE | Secures clutch pack retainers |
| 4657301034 | SCREEN SHEET | Fine mesh filter for oil circuit |
| 4657301035 | SCREEN SHEET | Coarse mesh pre-filter |
| 0636100803 | CAP SCREW | High-tensile bolt for valve body |
| 4656301048 | OIL FEED.HOUSG. | Distributes hydraulic fluid to clutches |
