Ohio-based contractor Shelly and Sands, Inc., devised a highly efficient system for installing dowel bars used in concrete pavement patching. Its workers mounted an epoxy dispensing machine and a multiple-bit hydraulic drill on a used backhoe. The backhoe hydraulic system provided power for both drill and dispenser. Workers saw and remove deteriorated sections of the old pavement. Before patching, they use the triple-bit drill to bore 1 1/8-inch-diameter holes in the existing concrete. Workers next inject the paste into the drilled holes, then insert 1-inch diameter bars.