Overview
The ZF 4657.066.003 6 WG 211 Powershift Transmission Assembly is a complete, fully assembled unit designed for heavy-duty off-highway machinery. This integral component serves as the core of the drivetrain, managing torque distribution and gear selection under high-stress conditions. Positioned between the engine and the final drive, the SKU 4657.066.003 replaces the entire transmission housing and internal gear cluster. For optimal hydraulic control, this assembly works directly with the 4657120005: PRESSURE REGULATOR to maintain consistent oil flow, while the 0501211384: VALVE governs shift timing within the valve body.
Symptoms of Failure
- Erratic gear engagement or slipping under load: Worn internal clutches or a failing 4656306145: PISTON can cause delayed or incomplete shifts, especially in reverse or first gear.
- External oil leaks near the bell housing: Degraded seals or a cracked housing allow transmission fluid to escape, often visible as drips after shutdown.
- Unusual grinding or whining noises during operation: Damaged bearings or a loose 0630532183: INDENTED RING create metallic sounds that worsen with speed.
- Loss of power in forward gears: Internal pressure drops from a faulty regulator or valve cause the transmission to slip, reducing torque delivery to the wheels.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4657.066.003 |
| Assembly Type | Complete Powershift Transmission Unit |
| Weight (approx.) | 185 kg (408 lbs) |
| Dimensions (L x W x H) | 620 mm x 480 mm x 410 mm |
| Housing Material | Cast Iron (GGG-40) |
| OEM Reference | ZF 6 WG 211 |
| Max Input Torque | 1,200 Nm |
| Oil Capacity | 14.5 liters |
Compatibility
This complete assembly is engineered for the ZF WG 211 series, but its core architecture shares design principles with the WG 180 and WG 200 families. It is a direct fit for models including the 6 WG 211, 6 WG 180, and 6 WG 200 used in loaders, graders, and agricultural tractors. The unit also integrates with earlier WG 160 variants when paired with the correct 4657101049: TRANSMISSION HOUSING and 4657301130: HOUS.FRONT SECT. For rear-mounted applications, the 4657301131: HOUSING REAR PART ensures proper alignment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657120005 | PRESSURE REGULATOR | Controls hydraulic pressure for clutch engagement |
| 0501211384 | VALVE | Directs oil flow for shift timing |
| 0630532183 | INDENTED RING | Secures piston assembly within drum |
| 4656306145 | PISTON | Applies force to clutch packs |
| 0732042767 | COMPRESSION SPRING | Returns piston to neutral position |
| 0631612064 | SET SCREW | Locks valve body components |
| 0631610026 | SET SCREW | Adjusts pressure regulator setting |
| 4657101049 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 4657301130 | HOUS.FRONT SECT | Front section housing input shaft |
| 4657301131 | HOUSING REAR PART | Rear section supporting output flange |
