Overview
The ZF 4657.056.207 6 WG 210 Powershift Transmission Assembly | Complete Unit is a fully integrated drop-in replacement for heavy-duty off-highway applications. This complete assembly houses the core gear train, clutch packs, and hydraulic control system for the WG 210 series. As a sealed, ready-to-install unit, it eliminates the need for internal component assembly. The SKU 4657.056.207 identifies this as a factory-matched assembly, ensuring precise alignment of all rotating elements. It sits as the central structural core of the drivetrain, connecting directly to the TRANSMISSION HOUSING and the HOUS.FRONT SECT to form a sealed, pressurized system.
Symptoms of Failure
When the ZF 4657.056.207 assembly begins to fail, operators typically notice these specific issues:
- Erratic gear engagement under load: The transmission hesitates or clunks harshly when shifting from forward to reverse, indicating internal clutch pack wear or hydraulic pressure loss within the assembly.
- Persistent oil leaks at the housing seam: Fluid weeping between the main assembly and the HOUSING REAR PART suggests gasket failure or case cracking, leading to low fluid levels and overheating.
- Torque converter shudder at low RPM: A vibration felt through the chassis during inching or creeping operations points to stator or turbine damage inside the complete unit.
- Metal particles in the transmission fluid: Shiny debris found during routine oil changes signals bearing or gear tooth spalling within the assembly, requiring immediate replacement.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4657.056.207 |
| Assembly Type | Complete Powershift Unit (6 WG 210) |
| 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) |
| OEM Reference | ZF Friedrichshafen AG |
| Bolt Torque (housing) | 120 Nm (cap screws: CAP SCREW & CAP SCREW) |
| Alignment Pin | CYLINDRICAL PIN |
| Retention Plate | FIXING PLATE |
| Filter Screens | SCREEN SHEET (x2) & SCREEN SHEET |
Compatibility
This complete assembly is engineered specifically for the ZF WG 210 series powershift transmissions. It is directly compatible with models that share the same bellhousing bolt pattern and input shaft spline count, including the WG 180 (with adapter plate), WG 200, and WG 210 variants used in wheel loaders, forklifts, and telehandlers. The assembly interfaces with the HOUSING REAR SECTION to accommodate different PTO configurations. Always verify your transmission model tag before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101082 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 4657201166 | HOUS.FRONT SECT | Front section housing torque converter |
| 4657201170 | HOUSING REAR PART | Rear casing for output shaft support |
| 4657298102 | HOUSING REAR SECTION | Extended rear housing for PTO mounting |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing assembly |
| 0636100801 | CAP SCREW | M12 bolt for housing fastening |
| 4656301148 | FIXING PLATE | Retains clutch pack in position |
| 4657301032 | SCREEN SHEET | Fine mesh filter for hydraulic circuit |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter for oil sump |
| 0636100803 | CAP SCREW | M14 bolt for rear housing attachment |
