Overview
The ZF 4657.056.190 6 WG 210 Powershift Transmission Assembly | Complete Unit is a fully assembled, drop-in replacement for heavy-duty powershift applications. This complete unit integrates the main gear cluster, clutch packs, and hydraulic control system into a single, pre-tested assembly. As the core of the WG 210 series, it manages torque distribution across six forward speeds, ensuring smooth power delivery under load. The SKU 4657.056.190 identifies this as a factory-matched unit, eliminating the need for individual component sourcing. During installation, the assembly mates directly with the 4657101082: TRANSMISSION HOUSING to form the primary structural shell, while the 4657201166: HOUS.FRONT SECT seals the forward clutch cavity.
Symptoms of Failure
- Delayed engagement or gear slipping under load: Worn internal clutches or valve body wear in the 4657.056.190 cause hesitation when shifting from neutral to drive, or slipping during uphill hauling.
- Low hydraulic pressure and erratic shifting: Internal seal degradation leads to pressure drops, resulting in harsh or missed shifts, often accompanied by a whining noise from the pump section.
- External oil leaks at housing joints: Cracks or gasket failure in the assembly allow ATF to seep from the mating surfaces, particularly where the unit connects to the 4657201170: HOUSING REAR PART and the 4657298102: HOUSING REAR SECTION.
- Metal debris in transmission fluid: Advanced wear of planetary gears or bearings generates metallic particles, visible during fluid changes, indicating imminent internal failure of the complete unit.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number / SKU | 4657.056.190 |
| 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 4657.056.190 |
| Bolt Torque (main housing) | 120 Nm (use 0636100801: CAP SCREW) |
| Alignment Pin | 0631306816: CYLINDRICAL PIN |
Compatibility
This complete unit is engineered for the ZF WG 210 series powershift transmissions. It is directly compatible with the following ZF models: WG 180, WG 200, and WG 210 (all variants). The assembly also fits select ZF 6 WG 200 and 6 WG 210 configurations used in construction loaders, forklifts, and agricultural tractors. For proper sealing, the unit requires the 4656301148: FIXING PLATE to secure the rear cover, and either the 4657301032: SCREEN SHEET or 4657301033: SCREEN SHEET for oil filtration. Always verify your transmission serial number against the ZF parts catalog before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101082 | TRANSMISSION HOUSING | Main structural casing for the assembly |
| 4657201166 | HOUS.FRONT SECT | Front section housing clutch packs |
| 4657201170 | HOUSING REAR PART | Rear structural component for output shaft |
| 4657298102 | HOUSING REAR SECTION | End cover for rear bearing support |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing assembly |
| 0636100801 | CAP SCREW | Fastener for main housing bolts |
| 4656301148 | FIXING PLATE | Secures rear housing section |
| 4657301032 | SCREEN SHEET | Oil filter screen (fine mesh) |
| 4657301033 | SCREEN SHEET | Oil filter screen (coarse mesh) |
| 0636100803 | CAP SCREW | Fastener for rear section bolts |
