As a purpose HEAVY MOBILE EQUIPMENT MECHANIC (WG-5803-10) your purpose is to maintain, troubleshoot, overhaul, repair, modify, and inspect heavy mobile equipment, various support equipment, and special purpose vehicles such as; fuel dispensing trucks, refueling equipment, crash/structural firefighting equipment and pump trucks, forklifts, materiel handling, aircraft cargo loaders, aircraft and equipment tow tractors, large runway snow removal vehicles, aircraft de-icing equipment, sweepers, bulldozers, mobile cranes, road graders, heavy construction and earth moving vehicles, backhoes, front end loaders, excavators, trenchers, and tactical/armored protected vehicles. The work requires knowledge of how heavy duty machinery, engines, parts, and systems work; ability to detect faulty items, determine causes of malfunction, and determine best repair methods; and skill to assemble, disassemble, repair, rebuild or modify components and a variety of interconnected systems.