A professional who diagnoses mechanical failures and repairs tractors and tractor components according to manuals, factory specifications, and knowledge of engine performances, using handtools, power tools, and testing instruments. Respnsibilities include:

• Attaches compression, ignition, and timing test instruments to certain parts of tractor, using clamps and handtools.
• Starts engine dials and reads meters and gauges of testing equipment to diagnose engine malfunction.
• Removes and disassembles engine, transmission, and clutches, using hoists, jacks, and mechanic's handtools.
• Inspects parts for damage, and verifies dimensions and clearances of parts for conformance to factory specifications, using gauges, such as calipers, and micrometers.
• Replaces or repairs worn or damaged parts.
• Grinds valves, relines and adjusts brakes, tightens body bolts, aligns wheels, and tunes engine.
• May weld defective body or frame parts.