A professional who repairs railroad-car air compressors and compressor motors, following wiring diagrams and using handtools. Respnsibilities include:

• Disassembles compressor and examines parts for wear or breakage.
• Cleans parts and installs new piston rings and wrist pins.
• Replaces worn bearings, armatures, field coils, gears, and pinions in electric motors, following wiring diagram.
• Reassembles compressor and connects compressor to compressed air and electrical outlets to test operation.