• Inspect: Check equipment for faults and malfunctions
• Diagnose: Use computerized tools to identify problems
• Repair: Use hand and power tools to fix or replace parts
• Test: Make sure repairs meet manufacturer specifications
• Maintain: Perform routine maintenance, such as cleaning and lubricating
• Record: Keep detailed records of serviced machines
• Advise: Recommend equipment maintenance schedules to clients and management

Skills 

• Mechanical skill
• Ability to identify problems in large engines
• Ability to use a variety of hand and power tools
• Ability to consult equipment manuals and blueprints