Overview
The ZF 4657.056.301 6 WG 210 Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty off-highway applications. This assembly integrates the main drive housing, clutch packs, and hydraulic control circuits into a single, ready-to-install package. As the core of the WG 210 series, it manages torque distribution across six forward speeds and one reverse speed. The SKU 4657.056.301 denotes a fully assembled powershift unit, eliminating the need for piecemeal component sourcing. During installation, the assembly mates directly to the engine bellhousing and requires precise alignment with the HOUS.FRONT SECT to ensure proper shaft engagement. All internal clearances are pre-set at the factory, reducing on-site assembly time.
Symptoms of Failure
- Delayed or harsh engagement: When the unit’s internal clutch seals degrade, hydraulic pressure drops, causing a 2-3 second lag between shifting and actual gear engagement. Operators often report a “clunk” sound during direction changes.
- External oil seepage at the front housing: Worn gaskets or a cracked O-RING between the main assembly and the front section leads to ATF weeping. This is commonly spotted as a reddish stain near the bellhousing joint.
- Intermittent power loss under load: A failing torque converter lock-up clutch within the assembly causes the transmission to slip when climbing grades or pushing heavy loads. The engine RPM rises without a corresponding increase in wheel speed.
- Metallic grinding from the sump area: Worn planetary gear bearings shed debris into the oil pan. This symptom often accompanies a failure of the CYLINDRICAL PIN that locates the clutch drum assembly.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4657.056.301 |
| Series | WG 210 (6 WG 210) |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Overall Length | 720 mm |
| Overall Width | 480 mm |
| Overall Height | 510 mm |
| Housing Material | Cast iron (GGG-40) |
| Max Input Torque | 2,100 Nm |
| Fluid Capacity | 22 liters (ZF TE-ML 03 spec) |
| Bolt Torque (housing-to-engine) | 120 Nm (use CAP SCREW M12) |
| Clutch Plate Count | 6 friction / 6 steel (per pack) |
Compatibility
This complete unit is engineered for the ZF WG 210 series, specifically the 6-speed variant (6 WG 210). It is also mechanically interchangeable with the WG 200 series after replacing the 螺栓 (bolts) that secure the output flange, as the WG 200 uses a shorter bolt pattern. The assembly will not fit the WG 180 series without significant modification to the bellhousing adapter. For WG 210 applications, verify the serial number prefix “4657.056” to confirm compatibility with your existing hydraulic valve body.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657201161 | HOUS.FRONT SECT | Front housing section; aligns input shaft |
| 0636115293 | 螺栓 | M10x30 bolt; secures front housing to main case |
| 0634313603 | O-RING | Seals oil passage between housing sections |
| 0631306816 | CYLINDRICAL PIN | Locates clutch drum to prevent rotation |
| 0636100801 | CAP SCREW | M12x40 bolt; mounts transmission to engine |
| 4656301148 | FIXING PLATE | Retains output shaft bearing in housing |
| 4657301032 | SCREEN SHEET | Fine mesh filter for hydraulic circuit (inner) |
| 4657301033 | SCREEN SHEET | Fine mesh filter for hydraulic circuit (outer) |
| 0636100803 | CAP SCREW | M8x25 bolt; secures valve body cover |
| 4681301040 | OIL FEED.HOUSG. | Distributes pressurized oil to clutch packs |
