Overview
The ZF 4657.056.022 6 WG 210 Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty off-highway applications. This assembly integrates the main gear cluster, clutch packs, and hydraulic control components into a single ready-to-install package. As the core power delivery module for the WG 210 series, it replaces worn or failed transmissions in wheel loaders, dump trucks, and material handlers. The SKU 4657.056.022 is a direct OEM equivalent, ensuring seamless fitment with the TRANSMISSION HOUSING and the HOUS.FRONT SECT to form a complete driveline assembly.
Symptoms of Failure
- Erratic gear engagement or slipping under load – Worn clutch discs or piston seals inside the assembly cause delayed shifts or loss of torque during operation.
- Internal oil leaks and low hydraulic pressure – Cracks in the HOUSING REAR PART or damaged sealing surfaces lead to fluid loss, overheating, and eventual transmission failure.
- Unusual grinding or whining noises – Failed bearings or damaged planetary gears within the assembly produce metallic sounds, especially during direction changes.
- Inability to hold park or neutral – A failing spool valve or broken CYLINDRICAL PIN prevents proper detent engagement, causing unintended vehicle movement.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number / SKU | 4657.056.022 |
| 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 4657.056.022 |
| Torque Capacity (max) | 2,100 Nm |
| Number of Speeds | 6 forward / 3 reverse |
| Hydraulic Pressure Range | 18–22 bar |
Compatibility
This complete unit is engineered for the ZF WG 210 series, but it also fits earlier WG 180 and WG 200 models with minor adapter modifications. It is commonly used in ZF 6WG210, 6WG200, and 6WG180 transmissions found in Volvo L120, Caterpillar 950, and Komatsu WA380 wheel loaders. Always verify the bellhousing pattern and torque converter match before installation. For partial rebuilds, the TRANSMISSION HOUSING and HOUS.FRONT SECT are critical mating components.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101039 | TRANSMISSION HOUSING | Main structural casing for gear and clutch assembly |
| 4657201028 | HOUS.FRONT SECT | Front section housing input shaft and torque converter |
| 4657201013 | HOUSING REAR PART | Rear section supporting output shaft and PTO |
| 0631306792 | CYLINDRICAL PIN | Alignment pin for housing sections |
| 0636100801 | CAP SCREW | Fastener for housing bolts |
| 4656301148 | FIXING PLATE | Secures clutch pack retaining ring |
| 4657301034 | SCREEN SHEET | Fine mesh filter for hydraulic circuit |
| 4657301035 | SCREEN SHEET | Coarse mesh pre-filter for oil pump |
| 0636100803 | CAP SCREW | Bolt for valve body mounting |
| 4681301040 | OIL FEED.HOUSG. | Distributes pressurized oil to clutch packs |
Authorized ZF Distributor
We are a certified supplier of genuine ZF components.
