Install or repair accessories.

Inspect brake systems, steering mechanisms, wheel bearings, and other important parts to ensure that they are in proper operating condition.

Inspect, repair, and maintain automotive and mechanical equipment and machinery, such as pumps and compressors.

Adjust and reline brakes, align wheels, tighten bolts and screws, and reassemble equipment.

Examine and adjust protective guards, loose bolts, and specified safety devices.

Follow green operational practices involving conservation of water or energy or reduction of solid waste.

Use handtools, such as screwdrivers, pliers, wrenches, pressure gauges, or precision instruments, as well as power tools, such as pneumatic wrenches, lathes, welding equipment, or jacks and hoists.

Raise trucks, buses, and heavy parts or equipment using hydraulic jacks or hoists.

Attach test instruments to equipment, and read dials and gauges to diagnose malfunctions.

Perform routine maintenance such as changing oil, checking batteries, and lubricating equipment and machinery.

Inspect, test, and listen to defective equipment to diagnose malfunctions, using test instruments such as handheld computers, motor analyzers, chassis charts, or pressure gauges.

Test drive trucks and buses to diagnose malfunctions or to ensure that they are working properly.

Adjust or repair computer controlled exhaust emissions devices.

Maintain or repair vehicles with alternative fuel systems, including biodiesel, hybrid, or compressed natural gas vehicles.

Repair or adjust seats, doors, or windows.

Rewire ignition systems, lights, and instrument panels.

Inspect and verify dimensions and clearances of parts to ensure conformance to factory specifications.

Measure vehicle emissions to determine whether they are within acceptable limits.

Diagnose and repair vehicle heating and cooling systems.

Align front ends and suspension systems.

Disassemble and overhaul internal combustion engines, pumps, generators, transmissions, clutches, and differential units.

Specialize in repairing and maintaining parts of the engine, such as fuel injection systems.

Rebuild gas or diesel engines.

Operate valve-grinding machines to grind and reset valves.

Recondition and replace parts, pistons, bearings, gears, and valves.