Overview
The ZF 4657.056.066 6 WG 210 Powershift Transmission Assembly | Complete Unit is a fully integrated, factory-assembled gearbox core designed for heavy-duty off-highway machinery. This complete unit serves as the central power distribution hub, converting engine torque into controlled, multi-speed output for wheel loaders, graders, and industrial vehicles. The SKU 4657.056.066 identifies a specific build variant within the WG 210 series, incorporating all internal clutch packs, planetary gearsets, and hydraulic control valves. When replacing a worn unit, ensure the 4657101046: TRANSMISSION HOUSING is inspected for cracks, as the housing provides the structural foundation for the entire assembly.
Symptoms of Failure
- Erratic gear engagement or slipping under load: Worn clutch discs or degraded seals within the assembly cause delayed shifts or loss of torque during operation, often accompanied by a burning smell.
- External oil leaks at housing joints: Cracks in the 4657201028: HOUS.FRONT SECT or the 4657201021: HOUSING REAR PART allow transmission fluid to escape, leading to low pressure and eventual gearbox failure.
- Unusual metallic grinding or whining noises: Damaged bearings or misaligned shafts inside the complete unit produce audible distress signals, particularly during directional changes.
- Intermittent loss of drive in forward or reverse: Hydraulic circuit blockages or a failing torque converter cause the machine to stall or refuse to move, requiring immediate replacement of the assembly.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 4657.056.066 |
| Assembly Type | Complete Powershift Transmission Unit |
| Series | WG 210 |
| Dry Weight (approx.) | 385 kg (849 lbs) |
| Overall Length | 720 mm |
| Overall Width | 510 mm |
| Overall Height | 580 mm |
| Housing Material | High-grade cast iron (GGG-40) |
| OEM Reference | ZF 6 WG 210 |
| Number of Speeds | 6 forward / 3 reverse |
| Max Input Torque | 2100 Nm |
Compatibility
This complete unit is engineered for the ZF WG 210 series. It is directly compatible with models including the WG180, WG200, and WG210 when used as a direct replacement for the main gearbox assembly. The unit also fits select variants of the WG160 and WG250 series with adapter modifications. Always verify the bellhousing pattern and output flange configuration against your machine’s original equipment. For proper installation, the 0631306792: CYLINDRICAL PIN must be aligned correctly to ensure precise dowel alignment between the housing sections.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101046 | TRANSMISSION HOUSING | Main structural casing for the gearbox assembly |
| 4657201028 | HOUS.FRONT SECT | Front section housing the input shaft and torque converter |
| 4657201021 | HOUSING REAR PART | Rear section supporting output shaft and PTO drive |
| 0631306792 | CYLINDRICAL PIN | Alignment dowel for precise housing mating |
| 0636100801 | CAP SCREW | Fastener for securing housing flanges |
| 4656301148 | FIXING PLATE | Locking plate for clutch pack retention |
| 4657301034 | SCREEN SHEET | Fine mesh filter for hydraulic circuit protection |
| 4657301035 | SCREEN SHEET | Coarse mesh pre-filter for oil sump |
| 0636100803 | CAP SCREW | High-tensile bolt for valve body mounting |
| 0750301003 | OIL FEED.HOUSG. | Lubrication oil distribution manifold |
