Repairs and troubleshoots equipment; observes mechanical devices in operation to locate causes of trouble; dismantles devices to gain access to repair or replaces defective parts using hoists, cranes, hand tools and power tools; repairs electrical equipment; welds and uses cutting torches; Performs routine mechanical, electrical, welding, or machining maintenance activities on equipment including lubrication, inspection, and replacement parts; order and maintains stock levels of lubricants used in plant equipment. Maintains in accordance with diagrams, sketches, operation manuals and manufacturer''s specifications, machinery and mechanical equipment such as engines, motors, pneumatic tools, chemical feeders, chlorinators, control units, pumps, water tanks, screens and other production equipment using hand tools, power tools, and precision measuring and testing instruments; adjusts functional parts of devices; identifies equipment maintenance needs; records mechanical equipment readings; lubricates and clean parts.