Troubleshooting, adjusting, and replacing AC and DC electrical equipment such as batteries, control stations, fuses, motor starters, relays, switches, timers, servo-driven equipment, photo-electrical devices, transducers, Variable Frequency Drives (VFD's), and encoders. Inspecting, troubleshooting, repairing, and/or replacing mechanical components such as motors, reducers, drive chains, sprockets, sheaves, pulleys, rollers, conveyor belts, bearings, and transfer plates.