Overview
The ZF 4657.066.006 6 WG 211 Powershift Transmission Assembly is a complete, factory-grade unit designed for heavy-duty off-highway applications. This assembly integrates the full gear train, clutch packs, and hydraulic control system into a single, ready-to-install package. As a core component of the WG 211 series, it manages torque distribution across six forward speeds, ensuring smooth power delivery under extreme loads. The SKU 4657.066.006 is a direct replacement for OEM units, eliminating the need for partial rebuilds. It sits at the heart of the drivetrain, connecting the engine to the final drive, and is engineered to withstand continuous operation in construction, mining, and agricultural machinery.
Symptoms of Failure
- Erratic gear engagement or slipping: When the assembly wears, you may experience delayed or harsh shifting, particularly under load. This often manifests as a “flare” between gears, indicating internal clutch pack wear or hydraulic pressure loss.
- External oil leaks near the housing seals: Degraded gaskets or cracked casings in the complete unit can lead to visible fluid seepage around the bell housing or output flange. This is a common sign that the 4657101049: TRANSMISSION HOUSING or its mating surfaces require inspection.
- Unusual whining or grinding noises: Worn bearings or damaged gears within the assembly produce metallic sounds during operation. This symptom often escalates quickly, risking catastrophic failure if the unit is not replaced.
- Reduced power or overheating: A failing assembly cannot maintain proper hydraulic pressure, leading to torque converter overheating and a noticeable drop in machine performance. This is frequently linked to a malfunctioning 4657120005: PRESSURE REGULATOR.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number / SKU | 4657.066.006 |
| Assembly Type | Complete Powershift Transmission (6 WG 211) |
| Dimensions (L x W x H) | Approx. 780 mm x 450 mm x 520 mm |
| Dry Weight | ~185 kg (408 lbs) |
| Primary Material | Cast Iron Housing with Hardened Steel Gears |
| OEM Reference | ZF 6 WG 211 Series |
| Fluid Capacity | ~22 Liters (SAE 10W-30 or equivalent) |
| Max Input Torque | 1,200 Nm (885 lb-ft) |
Compatibility
This complete unit is specifically engineered for the ZF WG 211 series, but its core architecture shares design principles with other WG family models. It is a direct fit for transmissions in the WG180, WG200, and WG210 series, provided the bell housing pattern matches. The assembly is commonly used in loaders, graders, and telescopic handlers from manufacturers like Volvo, Case, and JCB. For precise fitment, always cross-reference your existing transmission tag with the SKU 4657.066.006. Internal components such as the 0501211384: VALVE and 0630532183: INDENTED RING are shared across multiple WG variants, ensuring broad serviceability.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657120005 | PRESSURE REGULATOR | Controls hydraulic pressure to clutch packs |
| 0501211384 | VALVE | Directs oil flow for gear selection |
| 0630532183 | INDENTED RING | Secures piston assemblies within drums |
| 4656306145 | PISTON | Applies clutch pack pressure |
| 0732042767 | COMPRESSION SPRING | Returns pistons to neutral position |
| 0631612064 | SET SCREW | Locks valve body adjustments |
| 0631610026 | SET SCREW | Secures shift rail position |
| 4657101049 | TRANSMISSION HOUSING | Main structural casing for the assembly |
| 4657301130 | HOUS.FRONT SECT | Front section of the transmission housing |
| 4657301131 | HOUSING REAR PART | Rear section of the transmission housing |
Authorized ZF Distributor
We are a certified supplier of genuine ZF components.
