Skip navigation

Bus and Truck Mechanics and Diesel Engine Specialists - 49-3031.00

O*NET-SOC Description

Diagnose, adjust, repair, or overhaul buses and trucks, or maintain and repair any type of diesel engines. Includes mechanics working primarily with automobile or marine diesel engines.

Sample of Reported Job Titles

  • Bus Mechanic
  • Diesel Mechanic
  • Diesel Technician
  • Fleet Mechanic
  • General Repair Mechanic
  • Mechanic
  • Service Technician
  • Trailer Mechanic
  • Transit Mechanic
  • Truck Mechanic

SOC Occupation Groups

Related Occupations

Tasks

  • Adjust and reline brakes, align wheels, tighten bolts and screws, and reassemble equipment.
  • Adjust or repair computer controlled exhaust emissions devices.
  • Align front ends and suspension systems.
  • Attach test instruments to equipment, and read dials and gauges to diagnose malfunctions.
  • Diagnose and repair vehicle heating and cooling systems.
  • Disassemble and overhaul internal combustion engines, pumps, generators, transmissions, clutches, and differential units.
  • 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.
  • Inspect and verify dimensions and clearances of parts to ensure conformance to factory specifications.
  • 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.
  • Inspect, test, and listen to defective equipment to diagnose malfunctions, using test instruments such as handheld computers, motor analyzers, chassis charts, and pressure gauges.
  • Install or repair accessories.
  • Maintain or repair vehicles with alternative fuel systems, including biodiesel, hybrid, or compressed natural gas vehicles.
  • Measure vehicle emissions to determine whether they are within acceptable limits.
  • Operate valve-grinding machines to grind and reset valves.
  • Perform routine maintenance such as changing oil, checking batteries, and lubricating equipment and machinery.
  • Raise trucks, buses, and heavy parts or equipment using hydraulic jacks or hoists.
  • Rebuild gas or diesel engines.
  • Recondition and replace parts, pistons, bearings, gears, and valves.
  • Repair or adjust seats, doors, or windows.
  • Rewire ignition systems, lights, and instrument panels.
  • Specialize in repairing and maintaining parts of the engine, such as fuel injection systems.
  • Test drive trucks and buses to diagnose malfunctions or to ensure that they are working properly.
  • 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.

Detailed Work Activities

  • Adjust equipment to ensure optimal performance.
  • Adjust vehicle components according to specifications.
  • Align equipment or machinery.
  • Dismantle heavy equipment or machinery.
  • Grind parts to required dimensions.
  • Inspect mechanical components of vehicles to identify problems.
  • Install vehicle parts or accessories.
  • Lubricate equipment to allow proper functioning.
  • Measure distances or dimensions.
  • Measure equipment outputs.
  • Observe equipment in operation to detect potential problems.
  • Operate cranes, hoists, or other moving or lifting equipment.
  • Operate transportation equipment to demonstrate function or malfunction.
  • Rebuild parts or components.
  • Repair defective engines or engine components.
  • Repair non-engine automotive or vehicle components.
  • Replace worn, damaged, or defective mechanical parts.
  • Rewire electrical or electronic systems.
  • Service green vehicles to make repairs or maintain good working order.
  • Service vehicles to maintain functionality.
  • Test mechanical equipment to ensure proper functioning.
  • Troubleshoot equipment or systems operation problems.

Military Crosswalk Titles

  • 16V146TI Diesel Engine/Waste Heat System Technician (Navy - Enlisted)
  • Advanced Construction Mechanic (Navy - Enlisted)
  • Advanced Diagnostics Shop Management (Navy - Enlisted)
  • Aircraft Powerplant Repairer (Army - Enlisted)
  • ALCO (251C), and General Motors EMD (645) Diesel Engine Technician (Navy - Enlisted)
  • Assault Amphibious Vehicle (AAV) Repairer/Technician (Marine Corps - Enlisted)
  • Assault Breacher Vehicle/Joint Assault Bridge (JAB) Mechanic (Marine Corps - Enlisted)
  • Aviation Machinist's Mate (Navy - Enlisted)
  • Aviation Support Equipment Technician Basic (Navy - Enlisted)
  • Aviation Support Equipmentman (Navy - Enlisted)
  • Battle Force Intermediate Maintenance Activity (BFIMA) Governor and Injector Repair Technician (Navy - Enlisted)
  • BFIMA Diesel Engine, Governor and Injector Repair Tech, LSD-41 Class Propulsion Specialization (Navy - Enlisted)
  • BRADLEY Fighting Vehicle System Maintainer (Army - Enlisted)
  • BRADLEY Fighting Vehicle System Mechanic (Army - Enlisted)
  • Caterpillar Diesel Technician (Navy - Enlisted)
  • Caterpillar Electronically Controlled Engine Technician (Navy - Enlisted)
  • Construction Equipment Repairer (Army - Enlisted)
  • Construction Mechanic (Navy - Enlisted)
  • Construction Mechanic Basic (Navy - Enlisted)
  • Cummins Diesel Engines Technician (Navy - Enlisted)
  • Diesel-Electric Locomotive Repairman (Army - Enlisted)
  • Engineer Equipment Mechanic (Marine Corps - Enlisted)
  • Fairbanks Morse (38D 8-1/8) and Colt Pielstick (PC2.5V) Diesel Engine Technician (Navy - Enlisted)
  • Field Artillery (FA) Firefinder Radar Operator (Army - Enlisted)
  • Field Artillery Surveyor/Meteorological Crewmember (Army - Enlisted)
  • Heavy Wheel Vehicle Mechanic (Army - Enlisted)
  • Locomotive Repairer (RC) (Army - Enlisted)
  • LSD-41 Class Propulsion System Technician (Navy - Enlisted)
  • LSD-41/49 Class Advanced Engineering Control System-Machinery Control System (AECS-MCS) Propulsion Systems Technician (Navy - Enlisted)
  • M1 Abrams Tank System Maintainer (Army - Enlisted)
  • M1 ABRAMS Tank System Mechanic (Army - Enlisted)
  • M60A1/A3 Tank System Mechanic (Army - Enlisted)
  • Machinist's Mate (Navy - Enlisted)
  • Main Battle Tank (MBT) Repairer/Technician (Marine Corps - Enlisted)
  • MCM 1and2 Propulsion Technician (Navy - Enlisted)
  • MCM Propulsion Technician (Navy - Enlisted)
  • MTU Diesel Technician (Navy - Enlisted)
  • Multiple Launch Rocket System (MLRS) Operations/Fire Direction Specialist (Army - Enlisted)
  • Multiple Launch Rocket System (MLRS)/High Mobility Artillery Rocket System (HIMARS) Crewmember (Army - Enlisted)
  • NAMTS Diesel Engine, Governor and Injector Repair Technician, ALCO (251C) and General Motors EMD (645) Specialization (Navy - Enlisted)
  • NAMTS Diesel Engine, Governor and Injector Repair Technician, Fairbanks Morse (38D 8-1/8) and Colt Pielstick (PC2.5V) Specialization (Navy - Enlisted)
  • NAMTS Diesel Engine, Governor and Injector Repair Technician, FFG-7 Class Auxiliaries Mechanical System Specialization (Navy - Enlisted)
  • NAMTS Diesel Engine, Governor and Injector Repair Technician, MCM Propulsion (Isotta Franchini / SOLAR) Specialization (Navy - Enlisted)
  • NAMTS Diesel Engine, Governor, and Injector Repair Technician, Generalist (Navy - Enlisted)
  • PATRIOT Launching Station Enhanced Operator/Maintainer (Army - Enlisted)
  • PAXMAN Valenta Diesel Engine Operator (Navy - Enlisted)
  • Petroleum Supply Specialist (Army - Enlisted)
  • Power Generation Equipment Repairer (Army - Enlisted)
  • Power-Generation Equipment Repairer (Army - Enlisted)
  • Small Craft Mechanic (Marine Corps - Enlisted)
  • Special Vehicle Maintenance Journeyman, Fire Fighting Vehicles (Air Force - Enlisted)
  • Special Vehicle Maintenance Journeyman, Refueling Vehicles (Air Force - Enlisted)
  • SSN 719-725 and 750 Submarine Vertical Launch System Tube Maintenance Technician (Navy - Enlisted)
  • SSN/SSBN Diesel Engine (Fairbanks-Morse) Maintenance Technician (Navy - Enlisted)
  • STRYKER Systems Maintainer (Army - Enlisted)
  • Track Vehicle Repairer (Army - Enlisted)
  • Tracked Vehicle Repairer (Army - Enlisted)
  • Vehicle And Vehicular Equipment Maintenance Journeyman (Air Force - Enlisted)
  • Wheel Vehicle Repairer (Army - Enlisted)
  • Wheeled Vehicle Repairer (Army - Enlisted)

Apprenticeship Crosswalk Titles

  • Bus Maintenance Technician
  • Diesel Mechanic
  • Machinist, Marine Engine
  • Maintenance Mechanic
  • Mechanic, Industrial Truck
  • Oil Field Equipment Mechanic (Operator I Frac-Acid
  • Oil-Field Equipment Mechanic
  • Tractor Mechanic

DOT Crosswalk Titles

  • Deep Submergence Vehicle Crewmember
  • Diesel Mechanic
  • Diesel-Mechanic Apprentice
  • Machinist Apprentice, Marine Engine
  • Machinist, Marine Engine
  • Maintenance Mechanic
  • Maintenance Mechanic, Engine
  • Mechanic, Industrial Truck
  • Oil-Field Equipment Mechanic
  • Tractor Mechanic