Ability to diagnose mechanical defects and make repairs to engines, assemblies, components, and other systems on automotive, construction and other specialized equipment and also to detect by inspection, worn and broken parts, and parts that have been assembled incorrectly. Overhauls, repairs, adjusts and rebuilds engines, transmissions, differentials, clutches, and components of vehicle and equipment ignition, hydraulic, steering, braking, electrical, fuel, exhaust, cooling, suspension, components and mechanisms.