Truck Mechanic apprenticeship

Description of an apprenticeship as a Truck Mechanic

Truck Mechanic apprenticeship

DOT code: 620.261-010

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Repairs and overhauls automobiles, buses, trucks, and other automotive vehicles: Examines vehicle and discusses with customer or AUTOMOBILE‑REPAIR‑SERVICE ESTIMATOR; AUTOMOBILE TESTER; or BUS INSPECTOR nature and extent of damage or malfunction. Plans work procedure, using charts, technical manuals, and experience. Raises vehicle, using hydraulic jack or hoist, to gain access to mechanical units bolted to underside of vehicle. Removes unit, such as engine, transmission, or differential, using wrenches and hoist. Disassembles unit and inspects parts for wear, using micrometers, calipers, and thickness gauges. Repairs or replaces parts, such as pistons, rods, gears, valves, and bearings, using mechanic's handtools. Overhauls or replaces carburetors, blowers, generators, distributors, starters, and pumps. Rebuilds parts, such as crankshafts and cylinder blocks, using lathes, shapers, drill presses, and welding equipment. Rewires ignition system, lights, and instrument panel. Relines and adjusts brakes, aligns front end, repairs or replaces shock absorbers, and solders leaks in radiator. Mends damaged body and fenders by hammering out or filling in dents and welding broken parts. Replaces and adjusts headlights, and installs and repairs accessories, such as radios, heaters, mirrors, and windshield wipers.

Work process schedule

Task Hours
A. Front axle assemblies: dismantle for repair; repair or replace worn parts; align front end for proper steering. 500
B. Rear axle and differential: use of proper types of lubrication; dismantle and clean for repair; check grease seals; assemble differential and adjust. 800
C. Brake repairs: remove wheels, remove work brake shoes; reline shoes with new lining; check system and adjust. 500
D. Clutches: remove clutch housing; remove worn clutch, replace with new assembly. 500
E. Engines: remove from truck when necessary; dismantle for repairs; check bearings for wear; fit pistons, rings, rods and bearings; reface vales and lock, grind and adjust; set timing and adjust engine after assembly. 2000
F. Transmission repairs: remove and replace; clean and examine parts; install and adjust. 1100
G. Fuel system: Install new parts and adjust carburetors; repair or replace fuel pumps; check, repair, install and adjust various components of diesel system. 500
H. Electrical system: repair and adjust distributors; clean and adjust plugs; maintain proper condition of storage battery; repair electrical wiring system. 500
I. Miscellaneous repairs: repair or replace springs, shock absorbers, muffler and exhaust pipes; remove and replace universal joints, drive shafts; lubrication, grease, oil, P.M. checks; wheel balancing; electrical and gas weld; sheet metal and body; overhaul and rebuilding or tractors; tires; air systems; accessories rebuilding (electrical and air). 1400
J. Cooling systems 200
(Every 2,000 hours = one year) total hours: 8,000

Related technical instruction
The Commonwealth of Massachusetts requires 150 hours each year of related technical instruction which must be mastered by the apprentice in order to successfully complete the program. For further information, please call the Division of Apprentice Standards at (617) 626-5409.