Perform preventative maintenance and repairs on trailer refrigeration. Perform simple and complex mechanical and electrical repairs. Diagnose, remove, repair, replace or rebuild clutches, water pumps, tires, tractor suspension, body repairs, rear differentials, drive lines, transmissions, wheel seals, and brake systems. Diagnose and tune up or make repairs on diesel engines. Perform front wheel and axle alignments. Troubleshoot cooling systems. Conduct diagnostic tests. Cut or weld using cutting torch and welding machine. Read, understand and use service bulletins and technical manuals. Maintain shop tools. Complete all paperwork and computer input.