Overview
The ZF 4657.066.036 6 WG 211 Powershift Transmission Assembly represents a complete, drop-in replacement unit engineered for heavy-duty off-highway machinery. This fully assembled gearbox integrates the main drive train, clutch packs, and hydraulic control system into a single, pre-tested module. As a core component of the WG 211 Series, this assembly is designed to deliver precise power modulation under extreme load conditions. The SKU 4657.066.036 is the definitive reference for this complete unit, ensuring a direct match for your equipment’s driveline requirements. When installing this assembly, it is critical to pair it with a properly sealed 4657101049: TRANSMISSION HOUSING to maintain structural integrity and fluid containment.
Symptoms of Failure
When the ZF 4657.066.036 assembly begins to degrade, operators will notice distinct operational deficits. Delayed gear engagement under load is a primary indicator, often accompanied by a momentary loss of tractive effort when shifting from forward to reverse. Internal hydraulic pressure loss manifests as erratic clutch modulation, causing the machine to surge or hesitate during acceleration. Contaminated transmission fluid with metallic debris signals advanced wear within the planetary gear sets or clutch discs. Additionally, audible whining or grinding noises from the bell housing during power take-off (PTO) operation point to bearing fatigue within the assembly. Ignoring these symptoms can lead to catastrophic failure, damaging the 4657301130: HOUS.FRONT SECT and requiring a full rebuild.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number / SKU | 4657.066.036 |
| Assembly Type | 6-Speed Powershift Transmission (Complete Unit) |
| Series | WG 211 |
| Dry Weight (approx.) | 385 kg (849 lbs) |
| Overall Length | 720 mm |
| Overall Width | 510 mm |
| Overall Height | 480 mm |
| Housing Material | High-Grade Cast Iron (GGG-40) |
| Input Spline Count | 14-tooth, SAE 14″ |
| Max Input Torque | 1,200 Nm |
| OEM Reference | ZF 4657.066.036 |
Compatibility
This complete assembly is specifically designed for the ZF WG 211 transmission series. It is directly compatible with models including the WG180, WG200, and WG211 variants used in articulated dump trucks, wheel loaders, and telehandlers. The unit is a direct replacement for earlier 6-speed configurations found in OEM applications from manufacturers such as Volvo, Liebherr, and Terex. For proper installation, ensure the 4657301131: HOUSING REAR PART is correctly aligned with the output flange, and that the 0631306816: CYLINDRICAL PIN is used to index the housing halves during assembly to prevent misalignment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101049 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657301130 | HOUS.FRONT SECT | Front section housing input shaft and PTO |
| 4657301131 | HOUSING REAR PART | Rear section supporting output flange |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing assembly |
| 0636102489 | CAP SCREW | Fastener for housing bolt pattern |
| 4656301148 | FIXING PLATE | Locks clutch pack retaining ring |
| 0636102463 | CAP SCREW | Secures valve body to housing |
| 4657201133 | SCREEN SHEET | Filter mesh for hydraulic return line |
| 0636115287 | CAP SCREW | High-torque fastener for clutch cover |
| 4657301065 | PLATE | Spacer shim for gear end-play adjustment |
