Overview
The ZF 4657.056.203 6 WG 210 Powershift Transmission Assembly | Complete Unit is a fully assembled, ready-to-install core component designed for heavy-duty off-highway machinery. This complete unit integrates the main gear cluster, clutch packs, and hydraulic control elements within the WG 210 series architecture. As a drop-in replacement, it eliminates the need for piecemeal rebuilding, reducing downtime for equipment operating in construction, mining, and agricultural applications. The SKU 4657.056.203 identifies this specific assembly variant, which is engineered to match OEM torque and shift timing specifications. The unit sits centrally within the drivetrain, connecting directly to the TRANSMISSION HOUSING and the HOUS.FRONT SECT to form the sealed powertrain envelope.
Symptoms of Failure
- Delayed or harsh gear engagement: Worn internal clutches or seals cause a noticeable lag when shifting between forward and reverse, often accompanied by a jarring thud.
- Torque converter shudder under load: A vibrating or chattering sensation during acceleration indicates degraded stator or turbine components within the assembly.
- External oil seepage at housing joints: Leaks typically appear where the unit mates with the HOUSING REAR PART or the HOUSING REAR SECTION, signaling gasket failure or casing fatigue.
- Intermittent loss of power to wheels: Slipping under sustained torque, especially on inclines, points to worn clutch discs or a failing hydraulic pump inside the assembly.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4657.056.203 |
| Series | WG 210 (6-speed Powershift) |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Overall Length | 620 mm |
| Overall Width | 480 mm |
| Overall Height | 510 mm |
| Housing Material | High-strength cast iron (GGG-40) |
| Max Input Torque | 2,100 Nm |
| Hydraulic Pressure Range | 18–22 bar |
| OEM Reference | ZF 6 WG 210 |
Compatibility
This complete unit is specifically engineered for the ZF WG 210 series powershift transmissions. It is directly compatible with models including WG180, WG200, and WG210 when used in 6-speed configurations. The assembly also fits select variants of the WG160 and WG250 series that share the same bellhousing bolt pattern and hydraulic port layout. Always verify the serial number on your existing unit against the SKU 4657.056.203 to ensure proper fitment. When replacing the assembly, it is recommended to also inspect the TRANSMISSION HOUSING for cracks or wear.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101080 | TRANSMISSION HOUSING | Main structural casing that encloses the gear train |
| 4657201167 | HOUS.FRONT SECT | Front section housing the input shaft and pump drive |
| 4657201171 | HOUSING REAR PART | Rear casing segment supporting output shaft bearings |
| 4657298103 | HOUSING REAR SECTION | Extended rear cover for PTO mounting points |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for precise housing assembly |
| 0636100801 | CAP SCREW | M12 fastener for securing housing flanges |
| 4656301148 | FIXING PLATE | Locking plate for clutch pack retention |
| 4657301034 | SCREEN SHEET | Fine mesh filter for hydraulic return line |
| 4657301035 | SCREEN SHEET | Coarse mesh pre-filter for suction line |
| 0636100803 | CAP SCREW | M10 bolt for valve body attachment |
