Overview
The ZF 4657.066.010 6 WG 211 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 circuits into a single, pre-tested assembly. As the core of the WG 211 series, it manages torque distribution across six forward speeds, ensuring smooth power delivery under load. The SKU 4657.066.010 designates a factory-spec complete unit, eliminating the need for piecemeal rebuilding. It directly interfaces with the 4657101049: TRANSMISSION HOUSING and the 4657301130: HOUS.FRONT SECT to form the sealed driveline envelope.
Symptoms of Failure
When the ZF 4657.066.010 complete unit begins to fail, operators typically notice these specific issues:
- Delayed or harsh engagement between forward and reverse gears, often accompanied by a loud clunk. This indicates internal clutch pack wear or hydraulic pressure loss.
- Constant oil leaks from the bell housing or output shaft seal area, suggesting a compromised housing or seal interface within the assembly.
- Gear slipping under load, particularly in higher ranges (4th-6th gear), which points to worn friction discs or a failing 4657120005: PRESSURE REGULATOR unable to maintain clutch apply pressure.
- Unusual whining or grinding noises during deceleration, often caused by damaged bearings or a misaligned 0630532183: INDENTED RING that has shifted out of its groove.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number / SKU | 4657.066.010 |
| Assembly Type | Complete Powershift Unit (6 WG 211) |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Overall Length | 620 mm |
| Overall Width | 480 mm |
| Overall Height | 510 mm |
| Housing Material | Cast Iron (GGG-40) |
| OEM Reference | ZF 4657.066.010 / 6 WG 211 |
| Max Input Torque | 1,200 Nm |
| Hydraulic Pressure Range | 14-18 bar |
Compatibility
This ZF 4657.066.010 complete unit is specifically engineered for the WG 211 Series powershift transmissions. It is a direct fit for models including the WG180, WG200, and WG211 variants found in agricultural tractors and construction loaders. The assembly is also compatible with earlier WG150 and WG170 series when used with the appropriate 4657301131: HOUSING REAR PART adapter. Always verify the bell housing pattern and input shaft spline count before installation. The unit works in tandem with the 0501211384: VALVE for directional control and the 4656306145: PISTON for clutch pack actuation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657120005 | PRESSURE REGULATOR | Maintains hydraulic system pressure for clutch engagement |
| 0501211384 | VALVE | Directs oil flow for gear selection and modulation |
| 0630532183 | INDENTED RING | Locks clutch piston assembly in place |
| 4656306145 | PISTON | Applies force to clutch packs for gear engagement |
| 0732042767 | COMPRESSION SPRING | Returns piston to neutral position |
| 0631612064 | SET SCREW | Secures valve body to housing |
| 0631610026 | SET SCREW | Adjusts shift detent tension |
| 4657101049 | TRANSMISSION HOUSING | Main structural casing for the assembly |
| 4657301130 | HOUS.FRONT SECT | Front section housing input shaft and pump |
| 4657301131 | HOUSING REAR PART | Rear section housing output shaft and PTO drive |
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