Overview
The ZF 4657.056.142 6 WG 210 Powershift Transmission Assembly | Complete Unit is a fully assembled, ready-to-install gearbox core designed for heavy-duty off-highway machinery. This complete unit integrates the torque converter, planetary gear sets, and clutch packs within a single robust housing, serving as the primary power transfer module in ZF’s WG 210 series. The SKU 4657.056.142 identifies a factory-spec replacement assembly that eliminates the need for partial rebuilds, ensuring direct bolt-on compatibility with existing driveline components. It sits at the heart of the powertrain, converting engine torque into controlled hydraulic power for forward and reverse motion in wheel loaders, graders, and industrial tractors.
Symptoms of Failure
When the ZF 4657.056.142 assembly begins to fail, operators typically encounter these specific issues:
- Delayed or harsh gear engagement: A noticeable lag when shifting from neutral to forward or reverse, often accompanied by a jarring clunk, indicating worn clutch discs or degraded seals inside the unit.
- Internal oil leaks pooling at the bell housing: Transmission fluid seeping from the joint between the engine and transmission, usually caused by a compromised TRANSMISSION HOUSING or a failed front seal.
- Intermittent power loss under load: The machine struggles to maintain speed when climbing or digging, suggesting slipping clutches or a failing torque converter stator within the assembly.
- Metallic grinding or whining noise: High-pitched sounds during operation, often traced to bearing wear or gear damage inside the HOUS.FRONT SECT or the HOUSING REAR PART.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 4657.056.142 |
| Assembly Type | Complete Powershift Transmission Unit |
| Series | WG 210 |
| Overall Length (approx.) | 680 mm |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Housing Material | High-Strength Cast Iron |
| OEM Reference | ZF 4657.056.142 |
| Torque Capacity (est.) | 2100 Nm |
Compatibility
This complete unit is engineered for the ZF WG 210 transmission series, which includes models such as the WG180, WG200, and WG210. It is commonly used in articulated dump trucks, wheel loaders, and telescopic handlers from manufacturers like Volvo, Liebherr, and JCB. The assembly directly replaces the original unit in any vehicle originally equipped with a 6-speed WG210 powershift gearbox. For proper sealing, ensure the HOUSING REAR SECTION is inspected for cracks during installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101082 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657201166 | HOUS.FRONT SECT | Front section housing torque converter |
| 4657201170 | HOUSING REAR PART | Rear cover for output shaft support |
| 4657298102 | HOUSING REAR SECTION | Extended rear housing for PTO mounting |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing assembly |
| 0636100801 | CAP SCREW | Fastener for housing flanges |
| 4656301148 | FIXING PLATE | Locks bearing preload in rear section |
| 4657301032 | SCREEN SHEET | Fine mesh filter for oil return |
| 4657301033 | SCREEN SHEET | Coarse mesh filter for suction line |
| 0636100803 | CAP SCREW | High-torque bolt for clutch pack retention |
