Inspects, diagnoses, and repairs equipment including heavy duty trucks, mulching and refuse equipment, garbage trucks, spreaders, excavators, dozers, loaders, dump bodies/trailers, tractors, backhoes, sweepers, and all fire and rescue apparatus. Diagnoses, disassembles, inspects and repairs or replaces systems including air and hydraulic brakes, cooling systems, drive lines, gas and diesel engines, HVAC, advanced hydraulics, electrical, steering and suspension, and transmission.