Abstract: A wheel supported wagon includes a gravity discharge container or hopper for directing grain, feed, dry fertilizer or other granular material into a receiving box mounted on the side of the hopper. An inclined elongated auger unit includes a tubular conduit enclosing a hydraulically driven auger, and the lower end portion of the conduit has an inwardly projecting and upwardly curved annular upper flange. The flange seats on a downwardly projecting and outwardly curved lower flange forming part of an annular auger support member projecting downwardly from the material receiving box. The mating flanges provide for rotating the auger unit on a vertical axis and also for tilting the auger unit in a vertical plane at any selected rotational position.