Drills, taps, or reams holes, aligns components, and bolts, screws, or rivets them together using hand tools or portable power tools; installs moving parts, such as shafts, levers, fan blades, bearings, and work them to test free movement; bends and installs pipe for lubricating systems. Troubleshoots, dismantles, and reassembles machines, equipment, and their subassemblies according to customers' needs following drawings and other written and verbal specifications; plans assembly procedures, following specifications and using knowledge gained by experience.