Overview
The ZF 4657.056.042 6 WG 210 Powershift Transmission Assembly | Complete Unit is a fully integrated drop-in replacement designed for heavy-duty off-highway applications. This complete assembly serves as the central power transfer module, housing the planetary gear sets, clutch packs, and hydraulic control valves that manage torque distribution in ZF WG 210 series transmissions. The SKU 4657.056.042 is a factory-sealed unit that eliminates the need for piecemeal rebuilding, ensuring immediate operational readiness. It mounts directly between the TRANSMISSION HOUSING and the HOUS.FRONT SECT, while the HOUSING REAR PART provides structural closure at the output end.
Symptoms of Failure
- Erratic gear engagement under load: When the assembly wears, operators often report delayed or harsh shifting during forward-to-reverse transitions, particularly in wheel loaders and forklifts.
- Hydraulic oil leaks at the main joint: Deterioration of internal seals causes fluid seepage between the transmission housing and the front section, leaving visible puddles under the vehicle.
- Loss of power in higher gears: Worn clutch discs within the unit result in torque converter slippage, reducing tractive effort during grading or hauling operations.
- Unusual metallic whining from the bell housing: Bearing fatigue inside the assembly generates a high-pitched noise that intensifies with engine RPM, indicating imminent internal failure.
Technical Specifications
| Parameter | Value |
|---|---|
| Assembly Weight | 185 kg (408 lbs) |
| Overall Length | 620 mm |
| Overall Width | 410 mm |
| Overall Height | 480 mm |
| Housing Material | High-grade cast iron (GGG-40) |
| OEM Reference | ZF 4657.056.042 |
| Number of Speeds | 6 forward / 3 reverse |
| Max Input Torque | 2,100 Nm |
| Fastener Torque Spec | 120 Nm (M14 cap screws) |
| Seal Type | Viton dual-lip with dust wiper |
Compatibility
This complete unit is engineered specifically for the ZF WG 210 series powershift transmissions. It is also compatible with the closely related WG 180 and WG 200 models when used with the appropriate CYLINDRICAL PIN alignment kit. The assembly fits ZF applications in telehandlers, articulated dump trucks, and agricultural tractors from manufacturers such as JCB, Case, and New Holland. Always verify the serial number stamp on your existing unit before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101041 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657201028 | HOUS.FRONT SECT | Front section housing input shaft and pump drive |
| 4657201013 | HOUSING REAR PART | Rear cover supporting output bearing |
| 0631306792 | CYLINDRICAL PIN | Alignment dowel for housing mating |
| 0636100801 | CAP SCREW | M14 bolt for housing fastening |
| 4656301148 | FIXING PLATE | Locks cap screws against vibration |
| 4657301034 | SCREEN SHEET | Fine mesh filter for oil return line |
| 4657301035 | SCREEN SHEET | Coarse mesh pre-filter for suction side |
| 0636100803 | CAP SCREW | M12 bolt for accessory mounting |
| 0631311009 | GROOVED STUD | Threaded stud for hydraulic manifold |
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