Overview
The ZF 4657.056.218 6 WG 210 Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty off-highway machinery. This assembly serves as the core power transfer module within the WG 210 series, integrating the planetary gear sets, clutch packs, and hydraulic control valves into a single, ready-to-install package. As a complete unit, SKU 4657.056.218 eliminates the need for piecemeal component assembly, ensuring precise gear alignment and hydraulic integrity. It sits directly between the engine bell housing and the final drive, converting engine torque into controlled, shiftable power for loaders, graders, and industrial tractors. For optimal sealing and structural support, this unit is typically mounted using the 4657101082: TRANSMISSION HOUSING and the 4657201166: HOUS.FRONT SECT.
Symptoms of Failure
- Delayed or harsh engagement: When the complete assembly wears, internal clutch pack clearances increase, causing a noticeable lag or a jarring shift when moving from neutral to forward or reverse.
- Torque converter shudder under load: A vibrating or chattering sensation during acceleration, particularly in lower gears, indicates internal wear within the stator or turbine components of the assembly.
- External oil seepage from the bell housing area: Worn seals or gaskets within the assembly, often near the 4657201170: HOUSING REAR PART, lead to visible ATF leaks that reduce hydraulic pressure and cause slipping.
- Loss of power in higher gears: A gradual inability to maintain speed under load, often accompanied by elevated transmission temperatures, signals internal hydraulic circuit failure within the complete unit.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (SKU) | 4657.056.218 |
| Series | WG 210 (6-Speed Powershift) |
| Assembly Type | Complete Transmission Unit |
| Estimated Dry Weight | 385 kg (849 lbs) |
| Overall Length | 720 mm |
| Overall Width | 480 mm |
| Overall Height | 560 mm |
| Primary Material | Cast Iron Housing with Steel Gears |
| OEM Reference | ZF 4657.056.218 |
| Torque Capacity (Estimated) | 2,100 Nm (1,549 lb-ft) |
| Hydraulic Pressure Range | 18-22 bar (261-319 psi) |
Compatibility
This complete assembly is specifically engineered for the ZF WG 210 series of powershift transmissions. While the WG 210 is the primary application, the internal architecture shares design principles with the WG 180 and WG 200 series. However, the 4657.056.218 unit is dimensionally unique to the WG 210 housing structure. It is commonly found in OEM equipment such as the Liebherr L556, Volvo L90F, and Caterpillar 950H wheel loaders. The assembly integrates directly with the 4657298102: HOUSING REAR SECTION to complete the driveline enclosure.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101082 | TRANSMISSION HOUSING | Main structural casing for gear and shaft support |
| 4657201166 | HOUS.FRONT SECT | Front section housing for torque converter interface |
| 4657201170 | HOUSING REAR PART | Rear casing section for output shaft support |
| 4657298102 | HOUSING REAR SECTION | Extended rear housing for PTO or final drive connection |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for precise housing mating |
| 0636100801 | CAP SCREW | Fastener for securing housing sections |
| 4656301148 | FIXING PLATE | Mounting plate for valve body or filter bracket |
| 4657301032 | SCREEN SHEET | Fine mesh filter for hydraulic oil circuit |
| 4657301033 | SCREEN SHEET | Secondary filter screen for return line |
| 0636100803 | CAP SCREW | High-tensile bolt for clutch pack retention |
