Overview
The ZF 4657.056.090 6 WG 210 Powershift Transmission Assembly is a complete, factory-grade unit engineered for heavy-duty off-highway applications. This fully assembled gearbox integrates the main drive, clutch packs, and hydraulic control systems into a single, ready-to-install package. As the core power transfer module in the WG 210 series, it replaces worn or failed assemblies to restore original performance. The SKU 4657.056.090 is precision-machined to ZF OEM tolerances, ensuring seamless integration with existing driveline components. When installing this unit, it is critical to pair it with a properly sealed TRANSMISSION HOUSING to maintain structural integrity and oil containment.
Symptoms of Failure
- Erratic gear engagement or slipping under load: Worn clutch discs or hydraulic valve degradation inside the assembly cause delayed shifts or complete loss of drive in specific ranges.
- External oil leaks at the bell housing or output flange: Cracks in the main casing or failed seals allow transmission fluid to escape, often visible as drips after shutdown.
- Unusual whining or grinding noises during operation: Bearing wear or gear tooth damage within the 4657.056.090 produces audible distress, especially in lower gears.
- Overheating and burnt fluid odor: Internal friction material breakdown or blocked oil passages generate excessive heat, leading to thermal degradation of the hydraulic fluid.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number / SKU | 4657.056.090 |
| Assembly Type | Complete Powershift Transmission (6 WG 210) |
| Overall Length (approx.) | 720 mm |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Housing Material | High-strength cast iron (GGG-40) |
| OEM Reference | ZF 6 WG 210 |
| Bolt Torque (main housing) | 120 Nm (M12 cap screws) |
Compatibility
This complete unit is designed exclusively for the ZF WG 210 series of powershift transmissions. It is directly compatible with models including the WG 180, WG 200, and WG 210 variants used in construction loaders, graders, and industrial tractors. The assembly also fits select ZF 6WG-210 configurations found in older OEM equipment. For proper installation, ensure the HOUS.FRONT SECT and HOUSING REAR PART are free from cracks or distortion. Additionally, the CYLINDRICAL PIN must be replaced to guarantee accurate alignment during reassembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101039 | TRANSMISSION HOUSING | Main structural casing for gear and shaft support |
| 4657201028 | HOUS.FRONT SECT | Front section housing input shaft and pump drive |
| 4657201013 | HOUSING REAR PART | Rear section enclosing output shaft and parking brake |
| 0631306792 | CYLINDRICAL PIN | Alignment dowel for precise housing mating |
| 0636100801 | CAP SCREW | M12 bolt for housing flange fastening |
| 4656301148 | FIXING PLATE | Locking plate for clutch pack retention |
| 4657301034 | SCREEN SHEET | Fine mesh filter for hydraulic circuit |
| 4657301035 | SCREEN SHEET | Coarse mesh pre-filter for oil sump |
| 0636100803 | CAP SCREW | M10 bolt for cover plate mounting |
| 4681301040 | OIL FEED.HOUSG. | Pressurized oil distribution manifold |
