Overview
The ZF 4657.066.009 6 WG 211 Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty off-highway applications. This assembly integrates the clutch packs, planetary gear sets, and hydraulic control system into a single, ready-to-install package. As the core of the WG 211 series, it manages torque distribution across six forward speeds and one reverse, enabling smooth power shifts under load. The SKU 4657.066.009 is a direct OEM replacement, ensuring precise alignment with the original transmission housing and valve body. For optimal hydraulic pressure stability, this unit is often paired with a new 4657120005: PRESSURE REGULATOR, which modulates oil flow to prevent clutch pack overheating.
Symptoms of Failure
- Erratic gear engagement or slipping under load: Worn internal seals or piston rings cause pressure loss, leading to delayed shifts or clutch slip during grading or loading operations.
- Oil leaks from the bell housing or output shaft seal: Degraded gaskets or a cracked 4657101049: TRANSMISSION HOUSING allow ATF to escape, leaving puddles under the equipment.
- Harsh or clunking shifts: A failing 0501211384: VALVE in the hydraulic control module can cause abrupt pressure spikes, resulting in jarring gear changes.
- Reduced power output or transmission overheating: A stuck 4656306145: PISTON within a clutch pack prevents full engagement, generating excessive friction and heat.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4657.066.009 |
| 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 | High-tensile cast iron |
| OEM Reference | ZF 4657.066.009 |
| Max Input Torque | 1,200 Nm (885 lb-ft) |
| Hydraulic Pressure Range | 14–22 bar (203–319 psi) |
Compatibility
This complete assembly is engineered for the ZF WG 211 transmission series, which includes the WG180, WG200, and WG211 variants. It is commonly found in telescopic handlers, wheel loaders, and agricultural tractors from manufacturers like Manitou, JCB, and Claas. The unit is not backward-compatible with the older WG 150 series without significant modifications to the 4657301130: HOUS.FRONT SECT and 4657301131: HOUSING REAR PART. Always verify the bell housing pattern and input shaft spline count before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657120005 | PRESSURE REGULATOR | Controls main hydraulic pressure to clutch packs |
| 0501211384 | VALVE | Directs oil flow for shift timing |
| 0630532183 | INDENTED RING | Secures piston and spring assemblies |
| 4656306145 | PISTON | Applies clamping force to clutch discs |
| 0732042767 | COMPRESSION SPRING | Returns piston to neutral position |
| 0631612064 | SET SCREW | Locks valve body adjustment |
| 0631610026 | SET SCREW | Secures pressure regulator housing |
| 4657101049 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657301130 | HOUS.FRONT SECT | Front section of split housing |
| 4657301131 | HOUSING REAR PART | Rear section of split housing |
