Overview
The ZF 4657.056.325 6 WG 210 Powershift Transmission Assembly represents a complete, fully assembled unit engineered for heavy-duty off-highway applications. This core assembly integrates the main gear cluster, clutch packs, and hydraulic control circuits within a single robust housing. As a direct replacement for the WG 210 series, the SKU 4657.056.325 serves as the central power transfer module, converting engine torque into precise, multi-speed output for loaders, graders, and industrial vehicles. When installing this assembly, ensure the 4657201161: HOUS.FRONT SECT is correctly aligned to maintain structural integrity and oil gallery continuity.
Symptoms of Failure
- Erratic gear engagement and slipping under load: Worn internal clutches or valve body wear in the 4657.056.325 cause delayed shifts and power loss during acceleration, often accompanied by high engine RPM with low wheel speed.
- External oil leaks at the front housing interface: Degraded seals between the transmission assembly and the 0634313603: O-RING result in visible fluid drips, particularly after thermal cycling.
- Metallic grinding or whining noises from the gear train: Bearing fatigue or gear tooth spalling within the complete unit produces distinct high-frequency sounds that intensify with speed changes.
- Intermittent loss of hydraulic pressure: Internal debris or a failing pump within the assembly leads to erratic clutch application, causing the vehicle to unexpectedly lose drive in specific ranges.
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Part Number | 4657.056.325 |
| Assembly Type | Complete Powershift Transmission Unit |
| Series | WG 210 |
| Overall Length (approx.) | 680 mm |
| Dry Weight (approx.) | 185 kg |
| Housing Material | High-Grade Cast Iron |
| Input Torque Capacity (est.) | 2100 Nm |
| Number of Speeds | 6 Forward / 3 Reverse |
| Mounting Interface | SAE 3 |
Compatibility
This complete unit is specifically designed for the ZF WG 210 series. It is directly compatible with WG 180, WG 200, and WG 211 variants that share the same bell housing pattern and hydraulic control architecture. The assembly also integrates with earlier WG 160 models when using the appropriate adapter plate. For secure fastening during installation, the 0636115293: 螺栓 must be torqued to factory specifications, and the 0631306816: CYLINDRICAL PIN ensures precise dowel alignment between the transmission and engine flywheel housing.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657201161 | HOUS.FRONT SECT | Front housing section for gear support |
| 0636115293 | 螺栓 | Mounting bolt for assembly |
| 0634313603 | O-RING | Seal for hydraulic passages |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel pin |
| 0636100801 | CAP SCREW | Fastener for cover plates |
| 4656301148 | FIXING PLATE | Retention plate for clutch pack |
| 4657301032 | SCREEN SHEET | Fine mesh filter element |
| 4657301033 | SCREEN SHEET | Coarse mesh filter element |
| 0636100803 | CAP SCREW | High-strength cap screw |
| 4681301040 | OIL FEED.HOUSG. | Oil feed housing for lubrication |
