The grain harvester series is completed with the SIKU grain pusher based on the Dutch Holaras model. The three-part metal plate can be powerfully moved in the bunker silo, even with the biggest tractors. The plate elements to the right and left of the central main plate are movable. This makes it easy to adjust the pusher width and direction of grain material. The grain pusher can be attached both at the rear coupling and using a supplied adapter at the front coupling element of SIKU tractors.