Overview
The ZF 4657.056.197 6 WG 210 Powershift Transmission Assembly | Complete Unit is a fully assembled, direct-replacement gearbox designed for heavy-duty off-highway machinery. This complete unit integrates the main drive train, clutch packs, and hydraulic valve body into a single, pre-tested assembly. As a core component of the WG 210 Series, it is responsible for delivering seamless power distribution under extreme torque loads. The SKU 4657.056.197 identifies a factory-spec unit that eliminates the need for piecemeal rebuilding, ensuring immediate operational readiness. When installing this assembly, it is critical to pair it with a structurally sound 4657101080: TRANSMISSION HOUSING to guarantee proper alignment of the internal shafts.
Symptoms of Failure
When the ZF 4657.056.197 assembly begins to degrade, operators typically notice these specific failure modes:
- Erratic gear engagement under load: The transmission hesitates or clunks violently when shifting between forward and reverse, often caused by worn clutch discs within the unit.
- Torque converter overheating: Persistent high-temperature warnings occur due to internal seal failure, leading to fluid bypass and reduced hydraulic pressure.
- Oil leaks at the bell housing interface: Visible drips from the joint between the transmission and engine indicate a compromised front seal, often requiring replacement of the 4657201167: HOUS.FRONT SECT.
- Delayed directional shifts: A noticeable lag of 2-3 seconds when moving from neutral to drive signals a failing control valve spool or worn pump gears.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number / SKU | 4657.056.197 |
| Assembly Type | Complete Powershift Unit (6 WG 210) |
| Dry Weight (approx.) | 385 kg (849 lbs) |
| Overall Length | 720 mm |
| Housing Material | High-Grade Cast Iron (GGG-40) |
| OEM Reference | ZF 6 WG 210 |
| Torque Capacity | 2,100 Nm (1,549 lb-ft) |
| Fluid Capacity | 28 Liters (7.4 Gallons) |
Compatibility
This complete unit is engineered for the ZF WG 210 Series but is also compatible with several related ZF transmission models that share the same bolt pattern and input shaft spline. It directly replaces units in the WG 180 and WG 200 series when upgraded to the higher torque capacity of the 210. Additionally, it fits select WG 160 applications with adapter plates. For proper sealing, always inspect the 4657201171: HOUSING REAR PART and the 4657298103: HOUSING REAR SECTION for cracks during installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101080 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657201167 | HOUS.FRONT SECT | Front section housing torque converter |
| 4657201171 | HOUSING REAR PART | Rear casing for output shaft support |
| 4657298103 | HOUSING REAR SECTION | End cover for PTO mounting |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing mating |
| 0636100801 | CAP SCREW | M16 bolt for housing fastening |
| 4656301148 | FIXING PLATE | Locking plate for clutch piston |
| 4657301034 | SCREEN SHEET | Fine mesh filter for oil circuit |
| 4657301035 | SCREEN SHEET | Coarse mesh pre-filter |
| 0636100803 | CAP SCREW | M12 bolt for valve body |
