Diagnose, adjust, repair, or overhaul trucks, buses, and all types of diesel engines. Includes mechanics working primarily with automobile diesel engines.

• Use handtools such as screwdrivers, pliers, wrenches, pressure gauges, and precision instruments, as well as power tools such as pneumatic wrenches, lathes, welding equipment, and jacks and hoists.
• Inspect brake systems, steering mechanisms, wheel bearings, and other important parts to ensure that they are in proper operating condition.
• Adjust and reline brakes, align wheels, tighten bolts and screws, and reassemble equipment.
• Raise trucks, buses, and heavy parts or equipment using hydraulic jacks or hoists.
• Perform routine maintenance such as changing oil, checking batteries, and lubricating equipment and machinery.
• Test drive trucks and buses to diagnose malfunctions or to ensure that they are working properly.
• Examine and adjust protective guards, loose bolts, and specified safety devices.
• Attach test instruments to equipment, and read dials and gauges to diagnose malfunctions.
• Inspect, test, and listen to defective equipment to diagnose malfunctions, using test instruments such as handheld computers, motor analyzers, chassis charts, and pressure gauges.
• Inspect, repair, and maintain automotive and mechanical equipment and machinery such as pumps and compressors.
• Operate tow truck as needed.