Abstract: A power driven auxiliary conveyor assembly used in conjunction with a standard grain auger for sweeping grain on a supporting surface toward the infeed end of the grain auger. The auxiliary conveyor assembly consists of a longitudinally extending material conveying element driven by a hydraulic motor and in one form is an endless belt having cleats mounted thereon at longitudinally spaced intervals and, in a second embodiment, is a screw conveyor or auger. A sliding swivel connection, detachably connects the auxiliary conveyor assembly to the grain auger. The sliding connection facilitates loading the auxiliary conveyor assembly onto the grain auger so that it may be transported in a piggyback fashion. The pivot connection allows moving the auxiliary conveyor assembly relative to the grain auger during use.