Operated entirely from outside the bin, the Power-Sweep Bin Unloading System allows grain to be unloaded without having to enter the bin. One motor on the exterior power head operates both the unloading auger and the bin sweep. The basic system includes: (1) center power well and roller-supported gate with gear boxes, (2) bin sweep w/ back-up shield and reduction wheel, (3) under-bin tube and auger, (4) intermediate wells w/ roller-supported gates, and (5) bin wall flange; and control pipe kit with lever opener. The power head attaches with a square stub to make moving bin to bin more time efficient; the sweep remains in the bin at all times. Six-, eight-, and ten-inch package systems available for 15- to 60-foot-diameter bins.