FIELD: agricultural engineering. SUBSTANCE: grate 4 is installed in screen 2 independently with a provision for being moved from upper riddle 7 to transport board and back by flat lever mechanism 9 secured on separator panels. Kinematic linkage of grate 4 with screen 2 consists of a link with two kinematic rotating pairs. Mechanism 9 has the form of four-link assembly one link of which is adjustable. Installation angle to horizon of grate 4 is adjustable and its separating surface is convex. EFFECT: higher output of separator achieved by intensification of grain movement in the drop zone. 6 cl, 7 dwg
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