Overview
The ZF 4657.056.017 6 WG 210 Powershift Transmission Assembly is a complete, factory-spec unit designed for heavy-duty off-highway machinery. This assembly serves as the primary power transfer module within the WG 210 series, integrating the torque converter, planetary gear sets, and hydraulic control system into a single, ready-to-install package. It is engineered to manage high torque loads in wheel loaders, dozers, and material handlers. The SKU 4657.056.017 identifies a fully assembled unit with all internal clutches, seals, and bearings pre-installed, eliminating the need for core rebuilding. This part sits directly between the engine flywheel housing and the final drive, converting engine RPM into controlled tractive effort across six forward and three reverse speeds.
Symptoms of Failure
When the ZF 4657.056.017 assembly begins to degrade, operators will notice distinct operational faults. Recognizing these signs early prevents catastrophic drivetrain damage.
- Erratic gear engagement or clutch chatter: The machine hesitates or shudders violently when shifting from forward to reverse, indicating worn clutch packs or degraded hydraulic valve timing within the unit.
- Hydraulic oil contamination with metallic debris: Dark, gritty transmission fluid or visible bronze/steel particles in the filter signal internal bearing or gear wear, often originating from the planetary carriers.
- Loss of tractive effort under load: The engine revs freely but the machine fails to move or climbs grades poorly, pointing to internal seal failure or torque converter stator slippage inside the assembly.
- External fluid seepage at the bell housing: Oil weeping from the input shaft area or the main case split line indicates compromised rotary shaft seals, leading to low pressure and eventual clutch burn.
Technical Specifications
| Parameter | Value |
|---|---|
| Assembly Weight (Dry) | ~385 kg (849 lbs) |
| Overall Length (Input to Output Flange) | 712 mm |
| Housing Material | High-strength cast iron (GGG-40) |
| Input Torque Capacity | 1,450 Nm (1,069 lb-ft) |
| OEM Reference | ZF 4657.056.017 (Direct replacement) |
| Fluid Capacity (System) | 28 liters (7.4 gallons) |
| Number of Speeds | 6 Forward / 3 Reverse |
Compatibility
This complete unit is specifically engineered for the WG 210 transmission series. It is a direct fit for machines originally equipped with the following ZF drivetrain models:
- ZF WG 210 (all sub-variants, including 6 WG 210)
- ZF WG 180 (with adapter plate modifications; verify bell housing pattern)
- ZF WG 200 (mechanical interface matches; confirm output flange spline count)
- ZF WG 150 (not recommended without full driveline conversion)
Common applications include Volvo L90/L110 wheel loaders, Case 921E machines, and Liebherr L 538 models. Always cross-reference your chassis serial number with the 4657.056.017 SKU to ensure correct torque converter stall speed and PTO configuration.
