An in-cab controlled turbine cleaning fan maintains a constant air flow across the pan, chaffer and sieve for optimum cleaning in all conditions.
Air begins separating grain from chaff as soon as the material leaves the grates beneath the rotor, initiating the precleaning process.
The process is advanced even more by the large cleaning shoe, which measures 6,800 square inches in the Model 660 and 8,300 square inches in the Model 670.
