Overview
The ZF 4657.056.306 6 WG 210 Powershift Transmission Assembly is a complete, factory-grade unit designed for heavy-duty off-highway applications. This fully assembled transmission integrates the clutch pack, planetary gear sets, and hydraulic control system into a single, ready-to-install package. As a core component of the WG 210 Series, the SKU 4657.056.306 replaces the need for individual sub-assembly repairs, providing a direct OEM-matched solution for loaders, graders, and industrial vehicles. The unit sits as the primary power transfer module between the engine and the driveline, managing torque distribution across six forward speeds and three reverse ranges.
Symptoms of Failure
- Erratic gear engagement or slipping under load: When the internal clutch packs wear, operators experience delayed shifts or complete loss of drive in specific ranges, particularly during high-torque operations.
- Hydraulic oil leaks from the front housing interface: Degraded seals around the HOUS.FRONT SECT allow pressurized ATF to escape, leaving visible puddles under the bell housing.
- Abnormal whining or grinding noises from the gear train: Worn bearings or damaged planetary gears produce metallic sounds that intensify with engine RPM, indicating imminent internal failure.
- Overheating transmission fluid with burnt odor: Slipping clutches generate excessive friction, causing the oil to degrade rapidly and trigger thermal warnings on the dash.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4657.056.306 |
| Transmission Series | WG 210 (6 WG 210) |
| Assembly Type | Complete Powershift Unit |
| Dry Weight (approx.) | 385 kg (849 lbs) |
| Overall Length | 720 mm |
| Housing Material | High-tensile cast iron |
| Max Input Torque | 2,100 Nm |
| Oil Capacity | 28 liters (SAE 10W-30) |
| Bolt Torque (housing) | 120 Nm (M12 fasteners) |
Compatibility
This complete assembly is engineered for the ZF WG 210 Series, but it also shares mounting patterns and hydraulic interfaces with the WG 180 and WG 200 families. Specifically, the 4657.056.306 fits models such as the 6 WG 180, 6 WG 200, and 6 WG 210 used in Volvo, Case, and Caterpillar machinery. During installation, ensure the 螺栓 (mounting bolts) are torqued to spec, and replace the O-RING on the oil feed gallery to prevent pressure loss. The CYLINDRICAL PIN must be aligned correctly to index the front housing to the main case.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657201161 | HOUS.FRONT SECT | Front housing section for bell housing interface |
| 0636115293 | 螺栓 | High-strength mounting bolt for housing |
| 0634313603 | O-RING | Seal for hydraulic oil passages |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing assembly |
| 0636100801 | CAP SCREW | Fastener for clutch pack retention |
| 4656301148 | FIXING PLATE | Locks planetary gear carrier |
| 4657301032 | SCREEN SHEET | Fine mesh filter for oil sump |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter |
| 0636100803 | CAP SCREW | Bolt for valve body attachment |
| 4681301040 | OIL FEED.HOUSG. | Oil distribution housing for clutch lubrication |
