Overview
The ZF 4657.056.088 6 WG 210 Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty off-highway machinery. As the core of the WG 210 series, this assembly integrates the main gear cluster, clutch packs, and hydraulic control circuits into a single, ready-to-install package. The SKU 4657.056.088 specifically identifies a fully assembled powershift transmission, eliminating the need for piecemeal rebuilding. This unit sits between the engine bellhousing and the final drive, managing torque distribution across six forward speeds. For a complete installation, ensure the TRANSMISSION HOUSING is properly aligned, as it forms the structural backbone for this assembly.
Symptoms of Failure
- Erratic gear engagement under load: When the internal clutch packs wear, operators experience delayed or harsh shifting, particularly when moving from neutral to forward. This is a common symptom of internal hydraulic pressure loss within the assembly.
- Persistent transmission fluid leaks at the bellhousing: A failing main seal or cracked HOUS.FRONT SECT can cause oil to weep from the front of the unit, leading to low fluid levels and eventual overheating.
- Loss of power in higher gears: Worn planetary gears or damaged thrust washers inside the 6 WG 210 assembly often result in the transmission slipping out of 5th or 6th gear, especially during uphill operation.
- Unusual metallic grinding noises: A failing bearing or a loose CYLINDRICAL PIN inside the gear train produces a distinct whining or grinding sound that increases with engine RPM.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 4657.056.088 |
| Assembly Type | Complete Powershift Unit (6 WG 210) |
| Overall Length (approx.) | 685 mm |
| Dry Weight (approx.) | 195 kg (430 lbs) |
| Housing Material | High-strength cast iron |
| OEM Reference | ZF 6 WG 210 Series |
| Max Input Torque | 850 Nm (estimated) |
| Fluid Capacity | 12.5 liters (ZF TE-ML 03) |
Compatibility
This complete assembly is engineered for the ZF WG 210 series, but its core components are shared across several ZF powershift families. It is directly compatible with the WG 180 and WG 200 series when used with the correct HOUSING REAR PART. Additionally, it can be adapted to certain WG 160 and WG 250 configurations, though the rear mounting flange may require modification. Always verify the bellhousing pattern and output shaft spline count before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101039 | TRANSMISSION HOUSING | Main structural casing for the gear train |
| 4657201028 | HOUS.FRONT SECT | Front section housing the input shaft and pump drive |
| 4657201013 | HOUSING REAR PART | Rear section supporting output shaft and PTO |
| 0631306792 | CYLINDRICAL PIN | Alignment pin for housing mating surfaces |
| 0636100801 | CAP SCREW | Fastener for housing flanges |
| 4656301148 | FIXING PLATE | Retains clutch pack assembly |
| 4657301034 | SCREEN SHEET | Fine mesh filter for hydraulic circuit |
| 4657301035 | SCREEN SHEET | Coarse mesh pre-filter for oil sump |
| 0636100803 | CAP SCREW | High-torque bolt for clutch housing |
| 4681301040 | OIL FEED.HOUSG. | Distributes pressurized oil to clutch packs |
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