Overview
The ZF 4657.064.006 4 WG 211 Powershift Transmission Assembly is a complete, factory-engineered unit designed for heavy-duty off-highway machinery. This assembly integrates the main gear cluster, clutch packs, and hydraulic control components into a single, ready-to-install package. As the core power transfer module in the WG 211 series, it converts engine torque into precise, shift-on-the-go performance for loaders, graders, and industrial tractors. The SKU 4657.064.006 is a direct OEM replacement, ensuring seamless fitment without modifications. When installing this unit, it is critical to pair it with a properly sealed TRANSMISSION HOUSING to maintain alignment and fluid integrity.
Symptoms of Failure
- Erratic or delayed shifting under load: Worn clutch discs or piston seals inside the assembly cause hesitation between gears, especially when the machine is working in high-torque applications like pushing or lifting.
- Internal hydraulic pressure loss: A failing unit often leads to low line pressure, resulting in gear slipping or the transmission refusing to engage a specific range. This is frequently accompanied by a whining noise from the pump circuit.
- Contaminated transmission fluid with metallic debris: As internal bearings or gear teeth degrade, fine metal particles appear in the oil filter or sump magnet, indicating imminent failure of the 4657.064.006 assembly.
- External oil seepage from the bell housing joint: Cracks in the main casing or worn gaskets allow ATF to leak past the HOUS.FRONT SECT interface, creating visible drips after shutdown.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4657.064.006 |
| Assembly Type | 4 WG 211 Powershift (Complete Unit) |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Overall Length | 620 mm |
| Overall Width | 480 mm |
| Overall Height | 510 mm |
| Housing Material | High-grade cast iron (GGG-40) |
| Max Input Torque | 1,200 Nm |
| Fluid Capacity (assembly only) | 8.5 liters |
| OEM Reference | ZF 4657.064.006 / 4 WG 211 |
Compatibility
This complete unit is engineered for the ZF WG 211 series, but it also serves as a direct replacement in several other ZF powershift models. It is compatible with the WG 180, WG 200, and WG 210 series transmissions found in articulated dump trucks, wheel loaders, and telescopic handlers. The assembly shares mounting bolt patterns with earlier WG 150 variants when used with the correct HOUSING REAR PART. Always verify the input shaft spline count and bell housing depth before installation. For final alignment, a CYLINDRICAL PIN is required to index the assembly to the engine flywheel housing.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101049 | TRANSMISSION HOUSING | Main structural casing that encloses the gear train and supports the output shaft. |
| 4657301130 | HOUS.FRONT SECT | Front section of the housing that houses the input shaft and torque converter interface. |
| 4657301131 | HOUSING REAR PART | Rear housing segment that contains the output flange and PTO mounting points. |
| 0631306816 | CYLINDRICAL PIN | Dowel pin used for precise alignment between housing sections during assembly. |
| 0636102489 | CAP SCREW | M12 x 1.5 bolt for securing the housing front section to the main casing. |
| 4656301148 | FIXING PLATE | Locking plate that prevents cap screws from loosening under vibration. |
| 0636102463 | CAP SCREW | M10 x 1.5 bolt used for attaching the rear housing to the main assembly. |
| 4657201133 | SCREEN SHEET | Fine mesh filter screen placed in the oil return gallery to catch debris. |
| 0636115287 | CAP SCREW | M8 x 1.25 bolt for securing the screen sheet and valve body covers. |
| 4657301065 | PLATE | Reinforcement plate that distributes clamping force on the housing joint. |
Frequently Asked Questions
Q: Can the 4657.064.006 assembly be rebuilt, or must it be replaced as a complete unit?
A: While individual clutch packs and seals are serviceable, the 4 WG 211 assembly is factory-balanced and pressure-tested. For most field repairs, replacing the complete unit with SKU 4657.064.006 is recommended to avoid internal clearance issues and ensure consistent shift quality.
Q: What is the typical service life of this powershift transmission assembly?
A: Under normal operating conditions with proper fluid maintenance (ZF approved ATF, changed every 1,000 hours), the assembly can last 8,000 to 12,000 hours. Contaminated fluid or frequent overloads will significantly reduce this lifespan.
Q: Does this unit include the torque converter?
A: No. The 4657.064.006 is the main gear and clutch assembly only. The torque converter is a separate component that mounts to the HOUS.FRONT SECT and must be ordered independently if needed.
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Phone: +86 158 2286 3467 |
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