Overview
The ZF 4657.056.204 6 WG 210 Powershift Transmission Assembly is a complete, factory-grade unit engineered for heavy-duty industrial applications. This assembly serves as the central power distribution hub within the WG 210 series, integrating the torque converter, planetary gear sets, and hydraulic control system into a single, ready-to-install package. Designed for seamless replacement, the SKU 4657.056.204 ensures that your equipment returns to peak operational efficiency without the need for partial rebuilds. This unit sits directly between the engine flywheel and the final drive, managing all gear ratio changes under load. For maximum structural integrity, it is paired with the 4657101082: TRANSMISSION HOUSING, which provides the rigid foundation for the entire assembly.
Symptoms of Failure
- Erratic gear engagement under load: When the complete unit begins to fail, operators often report sudden, harsh shifts or a complete inability to engage a specific gear range during operation.
- Internal hydraulic pressure loss: A worn assembly can cause a drop in system pressure, leading to sluggish clutch pack engagement and a noticeable delay between shifting commands and vehicle response.
- Torque converter shudder: Vibration or shuddering during acceleration from a stop indicates internal wear within the converter or pump drive, often accompanied by metallic debris in the oil.
- External oil seepage at mating flanges: Cracks or warpage in the main housing sections allow transmission fluid to escape, typically pooling around the bell housing or rear output seal area.
Technical Specifications
| Parameter | Specification |
|---|---|
| Assembly Weight (Dry) | Approx. 195 kg (430 lbs) |
| Overall Length | 785 mm |
| Overall Width | 510 mm |
| Overall Height | 620 mm |
| Housing Material | High-strength cast iron (GGG-40) |
| OEM Reference | ZF 4657.056.204 |
| Max Input Torque | 2,100 Nm |
| Hydraulic System Pressure | 18-22 bar |
Compatibility
This complete unit is specifically designed for the WG 210 Series of powershift transmissions. It is directly compatible with models including the WG 180, WG 200, and WG 210 when used in wheel loaders, dozers, and material handlers. The assembly also integrates with the 4657201166: HOUS.FRONT SECT and the 4657201170: HOUSING REAR PART to form the complete structural envelope. For extended rebuilds, the 4657298102: HOUSING REAR SECTION is also required to maintain proper alignment of the output shaft and planetary carrier.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101082 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657201166 | HOUS.FRONT SECT | Front section housing torque converter |
| 4657201170 | HOUSING REAR PART | Rear section supporting output shaft |
| 4657298102 | HOUSING REAR SECTION | Secondary rear housing for planetary gears |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing mating |
| 0636100801 | CAP SCREW | Fastener for housing flanges |
| 4656301148 | FIXING PLATE | Locks bearing preload in assembly |
| 4657301032 | SCREEN SHEET | Fine mesh filter for hydraulic circuit |
| 4657301033 | SCREEN SHEET | Secondary filter for return line |
| 0636100803 | CAP SCREW | High-tensile bolt for bell housing |
