Overview
The ZF 4657.065.300 5 WG 211 Powershift Transmission Assembly | Complete Unit (SKU: 4657.065.300) is a fully assembled, direct-replacement gearbox unit engineered for heavy-duty off-highway applications. This complete assembly integrates the planetary gear sets, clutch packs, and hydraulic control system within a single, ready-to-install package. It serves as the central power transfer component in the ZF WG 211 series, converting engine torque into precise, shiftable output for wheel loaders, graders, and industrial vehicles. The unit is designed to be mounted directly to the engine bell housing and mates with the TRANSMISSION HOUSING to form a sealed, high-pressure oil circuit. Every 4657.065.300 assembly is factory-balanced and pressure-tested to meet OEM specifications, ensuring minimal downtime during replacement.
Symptoms of Failure
- Erratic or delayed gear engagement: When the internal clutch packs or valve body wear, operators experience hesitation or harsh shifts, especially when transitioning from forward to reverse under load.
- Torque converter shudder at low RPM: A vibrating or chattering sensation during inching or slow-speed maneuvering indicates internal wear on the stator or one-way clutch within the assembly.
- External oil seepage from the main case: Leaks often develop at the mating surfaces between the HOUS.FRONT SECT and the HOUSING REAR PART, leading to low fluid levels and eventual gear slippage.
- Metallic debris in the transmission fluid: Worn bearings or planetary gear teeth produce fine metal particles, which can clog the CYLINDRICAL PIN oil galleries and accelerate internal damage.
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Part Number | 4657.065.300 |
| Series | WG 211 (5-speed Powershift) |
| Dry Weight | Approx. 185 kg (408 lbs) |
| Overall Length | 620 mm (24.4 in) |
| Overall Width | 410 mm (16.1 in) |
| Overall Height | 480 mm (18.9 in) |
| Housing Material | High-strength cast iron (GGG-40) |
| Max Input Torque | 650 Nm (479 lb-ft) |
| Fluid Capacity | 12.5 liters (3.3 gal) |
| Mounting Pattern | SAE 3 (standard) |
Compatibility
This complete unit is specifically engineered for the ZF WG 211 transmission series. It is also a direct fit for the WG 180 and WG 200 series when used with the appropriate bell housing adapter. The assembly is commonly found in ZF 4WG-211 and 5WG-211 variants, covering both 4-speed and 5-speed configurations. It is not compatible with the WG 310 or WG 150 series without significant modification to the TRANSMISSION HOUSING.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101087 | TRANSMISSION HOUSING | Main structural case enclosing the gear train |
| 4657301172 | HOUS.FRONT SECT | Front section housing the torque converter |
| 4657301173 | HOUSING REAR PART | Rear section supporting output shaft bearings |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing mating surfaces |
| 0636102489 | CAP SCREW | M10 bolt for securing the front housing |
| 4656301148 | FIXING PLATE | Locks the clutch piston in position |
| 0636102463 | CAP SCREW | M8 bolt for the valve body cover |
| 4657201133 | SCREEN SHEET | Fine mesh filter for the oil pump intake |
| 0636115287 | CAP SCREW | M12 bolt for the rear housing flange |
| 4657301065 | PLATE | Spacer plate between clutch packs |
