Overview
The ZF 4657.056.031 6 WG 210 Powershift Transmission Assembly is a complete, factory-grade unit designed for heavy-duty off-highway machinery. This assembly serves as the core power transfer module within the WG 210 series, integrating the main gear set, clutch packs, and hydraulic control circuits into a single, ready-to-install package. The SKU 4657.056.031 replaces worn or failed assemblies to restore full torque capacity and shift precision in wheel loaders, dozers, and material handlers. When rebuilding, this unit is typically mated to a TRANSMISSION HOUSING to seal the internal components, while the OUTPUT FLANGE transfers rotational force to the driveline.
Symptoms of Failure
- Delayed or harsh gear engagement: Worn internal clutches or valve body wear cause hesitation when shifting from forward to reverse, often accompanied by a loud clunk.
- Low hydraulic pressure and overheating: Debris clogging the SCREEN SHEET restricts oil flow, leading to elevated sump temperatures and erratic shift patterns.
- External oil seepage at the bell housing: Cracks or fatigue in the HOUS.FRONT SECT allow ATF to weep past seals, leaving puddles under the machine after shutdown.
- Loss of power under load: Slipping clutches inside the assembly prevent full torque transfer, causing the engine to rev without proportional machine movement on inclines.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4657.056.031 |
| 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-Grade Cast Iron (GGG-40) |
| OEM Reference | ZF 4657.056.031 |
| Max Input Torque | 2,100 Nm |
| Oil Capacity | 18 liters (ZF TE-ML 03 fluid) |
Compatibility
This complete assembly is engineered specifically for the ZF WG 210 series transmissions. It is directly compatible with WG 210 models used in articulated dump trucks and large wheel loaders. While the WG 180 and WG 200 series share similar clutch pack architecture, the 4657.056.031 unit is dimensionally unique to the WG 210 housing and will not interchange without significant modifications. For partial rebuilds, the OUTPUT FLANGE and TRANSMISSION HOUSING must be sourced from the same series to maintain alignment tolerances.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657203002 | OUTPUT FLANGE | Connects transmission output shaft to driveshaft |
| 4657303029 | SCREEN SHEET | Filters debris from hydraulic oil circuit |
| 4657101039 | TRANSMISSION HOUSING | Main structural casing for gear and clutch assembly |
| 4657201028 | HOUS.FRONT SECT | Front section housing pump drive and converter |
| 4657201013 | HOUSING REAR PART | Rear casing supporting output shaft bearings |
| 0631306792 | CYLINDRICAL PIN | Alignment dowel for housing mating surfaces |
| 0636100801 | CAP SCREW | Fastener securing housing sections together |
| 4656301148 | FIXING PLATE | Retains clutch piston return springs |
| 4657301034 | SCREEN SHEET | Fine mesh filter for lube oil circuit |
| 4657301035 | SCREEN SHEET | Coarse mesh pre-filter for pump suction |
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