Overview
The ZF 4657.056.140 6 WG 210 Powershift Transmission Assembly | Complete Unit is a fully assembled, ready-to-install core component designed for heavy-duty off-highway machinery. This complete unit integrates the main gear train, clutch packs, and hydraulic control system within a single, robust assembly. As the central power transfer module in the WG 210 series, it converts engine torque into precise, multi-speed output for wheel loaders, graders, and industrial vehicles. The SKU 4657.056.140 identifies this as a factory-grade replacement unit, ensuring seamless compatibility with existing drivelines. When installing this assembly, it is critical to inspect the surrounding structural components, including the 4657101082: TRANSMISSION HOUSING, which provides the primary mounting envelope, and the 4657201166: HOUS.FRONT SECT that seals the forward clutch area.
Symptoms of Failure
When the ZF 4657.056.140 assembly begins to degrade, operators typically notice these specific failure modes:
- Erratic gear engagement or slipping under load: Worn clutch discs or valve body issues cause the transmission to hesitate or lose torque during acceleration, especially on inclines.
- Internal hydraulic pressure loss: A failing unit often results in low line pressure, leading to slow shifting and overheating of the transmission fluid.
- Metallic debris in the oil pan: Bearing or gear wear produces visible metal particles, indicating imminent internal failure of the complete unit.
- Oil leaks from the rear adapter area: Cracks in the 4657201170: HOUSING REAR PART or the 4657298102: HOUSING REAR SECTION can cause fluid seepage, reducing lubrication efficiency.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number / SKU | 4657.056.140 |
| Assembly Type | Complete Powershift Unit (6 WG 210) |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Overall Length | 620 mm |
| Overall Width | 450 mm |
| Overall Height | 510 mm |
| Housing Material | High-strength cast iron (GGG-40) |
| OEM Reference | ZF 6 WG 210 |
| Max Input Torque | 2100 Nm |
| Fluid Capacity | 12.5 liters (ATF Dexron III) |
Compatibility
This complete unit is engineered for the ZF WG 210 series powershift transmissions. It is directly compatible with the following models and their derivatives:
- ZF 6 WG 210 (primary application)
- ZF WG 180 (with adapter modifications)
- ZF WG 200 (shared clutch pack architecture)
- ZF WG 250 (limited compatibility with rear housing swap)
Always verify the rear housing configuration before installation, as the 4657298102: HOUSING REAR SECTION must match the vehicle’s PTO interface.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101082 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657201166 | HOUS.FRONT SECT | Forward clutch and pump mounting |
| 4657201170 | HOUSING REAR PART | Rear output shaft support |
| 4657298102 | HOUSING REAR SECTION | PTO and parking brake interface |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing halves |
| 0636100801 | CAP SCREW | M16 bolt for main housing |
| 4656301148 | FIXING PLATE | Retains clutch piston assembly |
| 4657301032 | SCREEN SHEET | Fine mesh filter for oil circuit |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter |
| 0636100803 | CAP SCREW | M12 bolt for rear housing |
