Overview
The ZF 4657.056.175 6 WG 210 Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty off-highway applications. This fully assembled gearbox integrates the main drive housing, clutch packs, and hydraulic control components into a single ready-to-install package. As a core replacement for the WG 210 series, the SKU 4657.056.175 eliminates the need for piecemeal rebuilding, reducing downtime in wheel loaders, dozers, and material handlers. The assembly sits as the primary power transfer module between the engine and driveline, managing torque distribution across six forward speeds. When replacing this unit, technicians often pair it with a new TRANSMISSION HOUSING to ensure proper sealing and alignment of the main case.
Symptoms of Failure
- Erratic gear engagement or slipping under load: Worn clutch discs or hydraulic valve degradation within the 4657.056.175 cause delayed shifts or complete loss of drive in specific gears, especially during high-torque maneuvers.
- External oil seepage from bell housing seams: Cracks or gasket failure in the main casing lead to ATF leaks, often mistaken for engine oil drips. This is common when the HOUS.FRONT SECT develops stress fractures from vibration.
- Metallic grinding noise during directional changes: Internal bearing failure or planetary gear scoring produces a distinct whine or grind when shifting from forward to reverse, indicating imminent assembly failure.
- Overheating with burnt fluid odor: Restricted oil flow from a clogged SCREEN SHEET or failing pump causes thermal runaway, discoloring the transmission fluid and damaging seals.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4657.056.175 |
| Assembly Type | 6 WG 210 Powershift Transmission (Complete Unit) |
| Dry Weight (approx.) | 385 kg (849 lbs) |
| Overall Length | 720 mm |
| Overall Width | 510 mm |
| Overall Height | 580 mm |
| Housing Material | High-strength cast iron (GGG-40) |
| OEM Reference | ZF 4657.056.175 |
| Torque Capacity | 2,100 Nm (1,549 lb-ft) |
| Input Spline | SAE 14T |
Compatibility
This complete unit is engineered specifically for the ZF WG 210 series powershift transmissions. It is directly compatible with WG 210 models used in Caterpillar, Volvo, and Liebherr wheel loaders from the mid-2000s. The assembly also fits WG 180 and WG 200 variants when paired with the correct HOUSING REAR PART to accommodate different output flange configurations. For WG 250 applications, the HOUSING REAR SECTION must be swapped to match the larger bearing journal. Always verify the bell housing pattern against your existing TRANSMISSION HOUSING before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101082 | TRANSMISSION HOUSING | Main structural case for gear and shaft support |
| 4657201166 | HOUS.FRONT SECT | Front section housing input shaft and PTO drive |
| 4657201170 | HOUSING REAR PART | Rear casing for output shaft and parking brake |
| 4657298102 | HOUSING REAR SECTION | Extended rear section for longer wheelbase machines |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing-to-housing mating |
| 0636100801 | CAP SCREW | M12 bolt for securing front housing section |
| 4656301148 | FIXING PLATE | Retainer plate for clutch pack preload |
| 4657301032 | SCREEN SHEET | Fine mesh filter for hydraulic circuit (outer) |
| 4657301033 | SCREEN SHEET | Fine mesh filter for hydraulic circuit (inner) |
| 0636100803 | CAP SCREW | M14 bolt for rear housing attachment |
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