Overview
The ZF 4657.056.168 6 WG 210 Powershift Transmission Assembly | Complete Unit is a fully assembled, ready-to-install core component designed for heavy-duty off-highway applications. As a complete powershift unit, it integrates the torque converter, planetary gear sets, and hydraulic control system into a single, sealed assembly. The SKU 4657.056.168 specifically identifies this as a 6-speed forward, 1-reverse configuration within the WG 210 series, providing seamless power delivery under load. This unit sits at the heart of the drivetrain, directly coupling the engine to the final drive, and is engineered to withstand the high torque demands of construction, mining, and agricultural machinery.
Symptoms of Failure
When the ZF 4657.056.168 assembly begins to fail, operators typically notice one or more of the following distinct symptoms:
- Delayed or harsh engagement: A noticeable lag when shifting from neutral to forward or reverse, often accompanied by a jarring clunk, indicates internal hydraulic pressure loss or clutch pack wear.
- Transmission overheating under light load: If the unit runs hotter than normal during routine operation, it may signal a failing torque converter or blocked internal oil passages, leading to reduced efficiency.
- Intermittent gear slipping: The engine revs up without a corresponding increase in vehicle speed, especially under load on inclines. This points to worn clutch discs or a failing valve body within the assembly.
- External oil seepage at the bell housing: Leaks originating from the front seal or housing joint indicate seal degradation, which can lead to low fluid levels and catastrophic failure if ignored.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number / SKU | 4657.056.168 |
| Assembly Type | Complete Powershift Transmission (6 WG 210) |
| Gear Configuration | 6 Forward / 1 Reverse |
| OEM Reference | ZF 6 WG 210 |
| Estimated Weight | 385 kg (849 lbs) |
| Housing Material | High-strength cast iron |
| Torque Converter Type | Single-stage, multi-element |
| Hydraulic Control | Electro-hydraulic modulation |
Compatibility
This complete unit is specifically engineered for the ZF WG 210 series of powershift transmissions. It is directly compatible with models including the WG 180, WG 200, and WG 210 variants found in articulated dump trucks, wheel loaders, and graders from manufacturers such as Volvo, Case, and Caterpillar. The 4657.056.168 assembly is a direct replacement for earlier 6-speed configurations within this family. When installing, ensure the bell housing pattern matches your engine flywheel housing; the unit is designed to bolt directly to the 4657101080: TRANSMISSION HOUSING and interfaces with the 4657201167: HOUS.FRONT SECT for proper alignment. The rear of the assembly seals against the 4657201171: HOUSING REAR PART and the 4657298103: HOUSING REAR SECTION to complete the drivetrain enclosure.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101080 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657201167 | HOUS.FRONT SECT | Front section housing for torque converter |
| 4657201171 | HOUSING REAR PART | Rear casing for output shaft support |
| 4657298103 | HOUSING REAR SECTION | Final rear enclosure for PTO mounting |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing assembly |
| 0636100801 | CAP SCREW | Fastener for housing bolt joints |
| 4656301148 | FIXING PLATE | Retainer for clutch pack assembly |
| 4657301034 | SCREEN SHEET | Filter screen for hydraulic return line |
| 4657301035 | SCREEN SHEET | Fine mesh filter for valve body protection |
| 0636100803 | CAP SCREW | High-torque fastener for rear housing |
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