Overview
The ZF 4657.056.170 6 WG 210 Powershift Transmission Assembly is a complete, factory-grade unit designed for heavy-duty off-highway machinery. As the core power transfer module in the WG 210 series, this assembly integrates the main gear cluster, clutch packs, and hydraulic control circuits into a single, ready-to-install package. The SKU 4657.056.170 is a direct OEM replacement, ensuring precise fitment and original performance characteristics. This unit sits between the engine flywheel and the final drive, managing torque distribution across six forward speeds and one reverse speed. For a full rebuild, pairing this assembly with a new TRANSMISSION HOUSING is critical to maintain structural integrity and alignment tolerances.
Symptoms of Failure
- Erratic gear engagement or slipping under load: Worn clutch discs or degraded seals inside the 4657.056.170 cause delayed shifts or complete loss of drive, especially in reverse.
- External oil leaks near the bell housing: Cracks in the main casing or failed gaskets allow ATF to weep, often visible as drips after shutdown.
- Unusual whining or grinding noises during operation: Bearing wear or gear tooth pitting within the assembly produces a metallic sound that increases with RPM.
- Overheating transmission fluid: Internal hydraulic circuit blockages or slipping clutches generate excess heat, triggering warning lights on the dash.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number / SKU | 4657.056.170 |
| Assembly Type | Complete Powershift Transmission (6 WG 210) |
| Overall Length | 780 mm (approx.) |
| Dry Weight | 295 kg (650 lbs) |
| Housing Material | High-strength cast iron (GGG-40) |
| OEM Reference | ZF 4657.056.170 |
| Torque Capacity | 2100 Nm (max) |
| Fluid Capacity | 22 liters (ATF Dexron III) |
Compatibility
This complete unit is engineered for the ZF WG 210 series, but it also shares mounting patterns and hydraulic interfaces with the WG 180 and WG 200 families. It is commonly found in articulated dump trucks, wheel loaders, and telescopic handlers from manufacturers such as Liebherr, JCB, and Volvo CE. When replacing the assembly, always inspect the HOUS.FRONT SECT and HOUSING REAR PART for wear, as these sections mate directly to the 4657.056.170. For extended service life, verify that the HOUSING REAR SECTION is free of cracks before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101082 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657201166 | HOUS.FRONT SECT | Front section housing input shaft |
| 4657201170 | HOUSING REAR PART | Rear section supporting output shaft |
| 4657298102 | HOUSING REAR SECTION | Extended rear housing for PTO mount |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing sections |
| 0636100801 | CAP SCREW | M12 fastener for housing bolts |
| 4656301148 | FIXING PLATE | Locks clutch pack retaining nuts |
| 4657301032 | SCREEN SHEET | Fine mesh filter for hydraulic circuit |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter for sump |
| 0636100803 | CAP SCREW | M10 fastener for cover plates |
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