Quick Facts
Median Salary$58,816
Most Common EducationHigh school or GED
Projected 10-Year Growth+21.85%
Assessment MatchTake the Assessment
What They Do
A Diesel Mechanic repairs and rebuilds diesel engines for vehicles like trucks, ships, tractors, and buses.
Core Tasks:
- 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.
- Inspect brake systems, steering mechanisms, wheel bearings, and other important parts to ensure that they are in proper operating condition.
- Raise trucks, buses, and heavy parts or equipment using hydraulic jacks or hoists.
- Adjust and reline brakes, align wheels, tighten bolts and screws, and reassemble equipment.
- Perform routine maintenance such as changing oil, checking batteries, and lubricating equipment and machinery.
- Attach test instruments to equipment, and read dials and gauges to diagnose malfunctions.
- Examine and adjust protective guards, loose bolts, and specified safety devices.
- Inspect, test, and listen to defective equipment to diagnose malfunctions, using test instruments such as handheld computers, motor analyzers, chassis charts, or pressure gauges.
- Diagnose and repair vehicle heating and cooling systems.
- Test drive trucks and buses to diagnose malfunctions or to ensure that they are working properly.
- Rewire ignition systems, lights, and instrument panels.
- Inspect, repair, and maintain automotive and mechanical equipment and machinery, such as pumps and compressors.
- Inspect and verify dimensions and clearances of parts to ensure conformance to factory specifications.
- Disassemble and overhaul internal combustion engines, pumps, generators, transmissions, clutches, and differential units.
- Adjust or repair computer controlled exhaust emissions devices.
- Rebuild gas or diesel engines.
- Specialize in repairing and maintaining parts of the engine, such as fuel injection systems.
- Recondition and replace parts, pistons, bearings, gears, and valves.
- Install or repair accessories.
- Repair or adjust seats, doors, or windows.
- Dismount, mount, and repair or replace tires.
- Align front ends and suspension systems.
- Maintain or repair vehicles with alternative fuel systems, including biodiesel, hybrid, or compressed natural gas vehicles.
What to expect as a Diesel Mechanic
1Earn a High school or GED Diploma
44% of people achieve this level of education.
2Gain skills and experience
See Diesel Mechanic related courses on Tallo
3Land a job
7206 openings for Diesel Mechanics
Career Progression
in United States (Nation)
The career progression is an interactive way to explore careers related to Diesel Mechanic. Click on each career to see its associated salary, job availability, skills, and more.



