Abstract: A rake classifier assembly including an elongate rake member reciprocally movable up an inclined surface to move solid material thereup is described. A pair of guide arrangements are provided each with a pivotally mounted elongate guide track along which respective wheels connected to the elongate rake member are movable. The guide tracks are selectively movable between first and second alignments, with the guide tracks extending substantially parallel to the inclined surface in the first alignment such that the elongate rake member can be moved up the inclined surface moving solid materials thereup, and in the second alignment the guide tracks diverge downwardly away from the inclined surface, such that as the elongate rake member is moved downwardly the elongate rake member also moves away from the inclined surface.