Abstract: A riding saw apparatus (20) has hydrostatic and hydraulic controls (26, 30, 31, 32) which are movable to various positions for different sawing operations. In addition, saw blades (72) mounted on a cutting assembly (24, 25) are movable to different positions at different angles for performing a number of sawing operations including sawing joints, making angled cuts, and following random cracks or curves. In addition, a timing mechanism (82) may be added so that the saw (20) may utilized for sawing recesses (110) in the pavement. The timing - mechanism (82) uses a cam (84) with a cam follower (86) controlling the depth of the cut of the blades (72). The saw also utilizes a mounting bracket (80) for mounting front wheels (38) or the cutting assemblies (24, 25) in different positions for the various sawing operations.

Abstract: A cooling system for a wheeled saw for widening cracks in an asphalt or concrete surface is disclosed. The cooling system includes a compressor and a water reservoir which provide pressurized air and water to one or more mist forming nozzles or fluid directing blocks. The mist is directed unto the cutting blade to keep it cool. After enlarging a crack, foreign materials are blown from the crack allowing it to be immediately sealed.