Overview
The ZF 4657.066.018 6 WG 211 Powershift Transmission Assembly | Complete Unit is a fully assembled, drop-in ready gearbox core designed for heavy-duty off-highway machinery. As a complete assembly, it integrates the main gear cluster, clutch packs, and hydraulic control system within a single robust housing. This SKU (4657.066.018) serves as the central power transfer module in the WG 211 series, converting engine torque into controlled wheel or driveline motion. When rebuilding a transmission, this complete unit is typically mated to the 4657101049: TRANSMISSION HOUSING to form the primary structural shell, while the 4657301130: HOUS.FRONT SECT and 4657301131: HOUSING REAR PART enclose the forward and aft sections of the assembly.
Symptoms of Failure
- Erratic gear engagement or slipping under load: Worn clutch discs or piston seals inside the assembly cause delayed shifts or loss of torque transfer, particularly in forward gears.
- External oil leaks at housing joints: Cracks or warpage in the main body lead to fluid seepage around the mating surfaces, often requiring replacement of the 0631306816: CYLINDRICAL PIN which aligns the housing sections.
- Unusual grinding or whining noises: Bearing failure or gear tooth spalling within the assembly produces metallic sounds during operation, indicating imminent internal damage.
- Inability to hold park or neutral: Hydraulic pressure loss from internal seal degradation prevents the transmission from staying in a selected mode, a common failure in high-hour units.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number / SKU | 4657.066.018 |
| Assembly Type | Complete Powershift Unit (6 WG 211) |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Overall Length | 720 mm |
| Overall Width | 480 mm |
| Overall Height | 510 mm |
| Primary Material | Cast Iron Housing with Steel Gears |
| OEM Reference | ZF 6 WG 211 |
| Fastener Torque Spec | Refer to 0636102489: CAP SCREW and 0636102463: CAP SCREW for housing bolts |
| Sealing Components | 4657201133: SCREEN SHEET and 4657301065: PLATE |
Compatibility
This complete assembly is engineered for the ZF WG 211 series powershift transmissions. It is directly compatible with models in the WG180, WG200, and WG211 families used in wheel loaders, forklifts, and telehandlers. The unit also fits select variants of the WG150 and WG250 series when used with the appropriate 4656301148: FIXING PLATE and 0636115287: CAP SCREW kits. Always verify your transmission serial number before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101049 | TRANSMISSION HOUSING | Main structural shell for gear train |
| 4657301130 | HOUS.FRONT SECT | Forward housing section for input shaft |
| 4657301131 | HOUSING REAR PART | Rear housing section for output shaft |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing mating |
| 0636102489 | CAP SCREW | Housing fastening bolt (M12) |
| 4656301148 | FIXING PLATE | Mounting bracket for transmission |
| 0636102463 | CAP SCREW | Housing fastening bolt (M10) |
| 4657201133 | SCREEN SHEET | Oil filter screen for hydraulic circuit |
| 0636115287 | CAP SCREW | Cover fastening bolt |
| 4657301065 | PLATE | Clutch piston retaining plate |
