Overview
The ZF 4657.056.185 6 WG 210 Powershift Transmission Assembly is a complete, factory-engineered unit designed for heavy-duty off-highway applications. This assembly serves as the central power transfer module within the WG 210 series, integrating the torque converter, planetary gear sets, and clutch packs into a single, ready-to-install package. The SKU 4657.056.185 is a direct replacement for worn or failed transmissions in wheel loaders, telehandlers, and industrial tractors. When rebuilding a transmission, this complete unit must be paired with a properly sealed TRANSMISSION HOUSING to ensure alignment of the main shaft and oil galleries.
Symptoms of Failure
- Delayed or harsh engagement: When the 4657.056.185 assembly wears, internal clutch piston seals degrade, causing a noticeable lag when shifting from neutral to forward or reverse. This often manifests as a “clunk” under load.
- Loss of power under load: Worn planetary gear bearings or damaged sun gears within the assembly lead to torque converter overheating and a 20-30% reduction in tractive effort during grading or lifting operations.
- External oil seepage at bell housing: Cracks in the main casing or degraded gaskets around the HOUS.FRONT SECT allow transmission fluid to pool, often mistaken for engine oil leaks.
- High-pitched whining noise: A constant metallic whine during deceleration indicates worn thrust washers or a failing output shaft bearing inside the assembly.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number / SKU | 4657.056.185 |
| Assembly Type | 6-Speed Powershift (WG 210) |
| Dry Weight (approx.) | 285 kg (628 lbs) |
| Overall Length | 620 mm |
| Overall Width | 480 mm |
| Overall Height | 510 mm |
| Housing Material | High-Grade Cast Iron (GGG-40) |
| OEM Reference | ZF 4657.056.185 |
| Torque Capacity | 2100 Nm (max input) |
Compatibility
This complete assembly is engineered specifically for the ZF WG 210 series. It is a direct fit for the following transmission models: WG 180, WG 200, and WG 210. It is commonly used in Liebherr, Volvo, and JCB equipment where the 6-speed powershift architecture is specified. The assembly interfaces with the HOUSING REAR PART and the HOUSING REAR SECTION to complete the driveline enclosure. Always verify the bell housing pattern and PTO configuration before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101082 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 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 section for PTO mount |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing dowels |
| 0636100801 | CAP SCREW | M16 bolt for housing fastening |
| 4656301148 | FIXING PLATE | Locks clutch pack retaining nuts |
| 4657301032 | SCREEN SHEET | Fine mesh filter for oil circuit |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter for sump |
| 0636100803 | CAP SCREW | M12 bolt for valve body mounting |
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