Repairs and maintains, in accordance with diagrams, sketches, operation manuals, and manufacturer's specifications, machinery and mechanical equipment, such as engines, motors, pneumatic tools, conveyor systems, production machines and equipment using hand tools, power tools, and precision measuring and testing instruments.Observes mechanical devices in operation and listens to their sounds to locate causes of malfunctions. Dismantles devices to gain access to and remove defective parts, using hoists, cranes, hand and power tools.Examines form and texture of parts to detect imperfections. Inspects used parts to determine changes in dimensional requirements, using rules, calipers and other instruments.Adjusts functional parts of devices and control instruments, using hand tools, levels, plumb bobs, and straight edges. Repairs or replaces defective parts using hand or power tools.Installs special functional and structural parts in devices using hand tools.Start devices to test their performance.Lubricate and clean parts.Setup and operate lathe, drill press, grinder and other metal working machines.May have some electrical equipment repair.