Overview
The ZF 4657.056.074 6 WG 210 Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty off-highway applications. This assembly integrates the core hydraulic and mechanical components of the WG 210 series, serving as the primary power transfer module between the engine and driveline. The SKU 4657.056.074 is a direct replacement for worn or failed assemblies, ensuring seamless integration with existing ZF drivetrains. It sits centrally within the transmission housing, connecting the torque converter to the output shaft, and is critical for maintaining consistent gear engagement under high load cycles.
Symptoms of Failure
- Erratic gear engagement or slipping: When the 4657.056.074 assembly wears, operators often report delayed or harsh shifting, particularly when transitioning between forward and reverse under load.
- Internal hydraulic pressure loss: A failing unit may cause a drop in clutch pack pressure, leading to overheating or a complete loss of drive in specific gear ranges.
- Contaminated transmission fluid: Debris from worn internal components can circulate through the system, causing erratic operation and premature wear of seals and bearings.
- Audible whining or grinding noises: Mechanical wear within the assembly often produces a distinct whine during acceleration or deceleration, indicating imminent failure.
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Reference | ZF 4657.056.074 |
| Assembly Type | Complete Powershift Unit (6 WG 210) |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Housing Material | High-strength cast iron (GGG-40) |
| Overall Length | 620 mm |
| Overall Width | 480 mm |
| Overall Height | 510 mm |
| Torque Capacity | 2,100 Nm (max) |
| Related Part: 0636100801 CAP SCREW | M12 x 1.5, grade 10.9 |
| Related Part: 4656301148 FIXING PLATE | Steel, 4 mm thick |
| Related Part: 4657301034 SCREEN SHEET | Fine mesh, 0.5 mm aperture |
| Related Part: 4657301035 SCREEN SHEET | Coarse mesh, 1.0 mm aperture |
| Related Part: 0636100803 CAP SCREW | M16 x 2.0, grade 10.9 |
| Related Part: 4681301040 OIL FEED HOUSG. | Cast aluminum, with O-ring groove |
Compatibility
This complete assembly is engineered for the ZF WG 210 series, but it also shares mounting and hydraulic interfaces with the WG 180 and WG 200 families. It is commonly used in telehandlers, wheel loaders, and industrial tractors from manufacturers such as JCB, Manitou, and Claas. For proper fitment, verify that your transmission model number begins with “6 WG 210” and that the bellhousing pattern matches your engine. The assembly is not backward-compatible with older WG 120 or WG 150 units without significant adapter modifications.
When replacing the 4657.056.074, it is critical to inspect the TRANSMISSION HOUSING for cracks or wear at the mounting flanges. The HOUS.FRONT SECT and HOUSING REAR PART must be aligned precisely using a CYLINDRICAL PIN to prevent oil leaks and gear misalignment. Always replace all seals and gaskets during assembly to ensure a leak-free installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101039 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 4657201028 | HOUS.FRONT SECT | Front section housing torque converter |
| 4657201013 | HOUSING REAR PART | Rear section supporting output shaft |
| 0631306792 | CYLINDRICAL PIN | Alignment dowel for housing sections |
| 0636100801 | CAP SCREW | Fastener for housing bolts |
| 4656301148 | FIXING PLATE | Secures clutch pack assembly |
| 4657301034 | SCREEN SHEET | Fine filter for hydraulic circuit |
| 4657301035 | SCREEN SHEET | Coarse filter for sump return |
| 0636100803 | CAP SCREW | High-torque fastener for bellhousing |
| 4681301040 | OIL FEED HOUSG. | Distributes pressurized oil to clutches |
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