The Heavy Equipment Mechanic, lead analyzes malfunctions and repairs, rebuilds, and maintains power equipment, such as cranes, power shovels, scrapers, paving machines, motor graders, trench-digging machines, conveyors, bulldozers, dredges, pumps, compressors, generators, weed eaters, tractors, and pneumatic tools. This worker operates and inspects machines or equipment to diagnose defects, dismantles, and reassembles equipment, using hoists and hand tools, examines parts for damage or excessive wear, using micrometers and gauges, replaces defective engines and subassemblies, such as transmissions, and tests overhauled equipment to insure operating efficiency.