Diesel/Heavy Equipment Technologies


Generally, over half the investment of a mining, construction, highway transportation or logging business is in its equipment. Good preventive maintenance is a priority and contributes to the success of the business. The hands-on approach to AVTEC’s Diesel/Heavy Equipment Technologies program helps students learn how to service, maintain, and repair equipment ranging from semi-trucks to bulldozers. As most equipment is powered by diesel engines, students will disassemble, measure, and reassemble engines to factory specifications. The technology changes in the past few years have led to the use of laptop and dedicated scan tools for diagnosis of electronically controlled engines and systems. Because of the complexity of this equipment, students should have good mechanical aptitude, strong reading and mathematics skills, should possess a good work ethic, and have the desire to succeed.

The nature of the training requires that students sometimes work outdoors. Warm clothing, rain gear, and proper safety boots are required. Construction equipment such as dump trucks, road graders, front-end loaders, backhoes, bulldozers, and a large transport truck are utilized by students developing mechanical skills.

Students may download reference for the Heavy Diesel text book Resource page (this page only accessible from AVTEC student network)

Clock Hours
8:30 a.m. to 3:30 p.m., Monday through Friday
Start Date
Program Costs
Room and Board
Technology Fee
Student Service Fee
Books (Provided by AVTEC)
Supplies (Provided by AVTEC)
Items NOT Provided by AVTEC
Total Cost
  • Good math and reading skills.
  • Students will need to provide their own tools, safety equipment, and work clothing
Physical requirements for program

Physical requirements of the occupation are the ability to lift 100 pounds, carry 50 pounds, stoop, kneel, crawl, walk, and stand continuously. The work also requires good finger dexterity.

Office Phone
Mechanic and Operator, 31 years
Owner, Supervisor, Mechanic, Commercial Truck Service, 4 years. Commercial Driver’s License (CDL)
Office Phone
A.S. Thomas Edison State
AVTEC Welding graduate
Diesel/Heavy Equipment Technologies
Employability Skills
Clock Hours
Participate in school safety orientation, complete achievement tests, complete applied math class and computer skills practice, participate in resume writing and job search training, and participate in an interview and communications training.
General Shop Operations
Clock Hours
Identify, use, and maintain basic shop tools, demonstrate the proper use of hand tools and basic power tools, define and apply mechanic terminology, identify common fasteners; read, tap, and thread chart and perform basic tapping and threading; identify and use precision measuring tools. Workplace Safety.
Hydraulic Systems
Clock Hours
Identify hydraulic components, understand basic pumps, explain hydraulic principles, demonstrate industrial applications, and troubleshoot hydraulic systems.
Clock Hours
Describe the design and operation of air and hydraulic brake systems, describe air and hydraulic supply system and service, truck rear axle brake application system and service, trailer brake application and service, tractor steering axle brake application system and service; service hydraulic and air brakes on truck or loader.
Tire Repair
Clock Hours
State safety issues and demonstrate proficiency in the repair of tires, service, and repair a large truck and loader tire; Service light truck, truck, and heavy equipment tires.
Introduction to Commercial Transportation
Clock Hours
Federal regulations; record keeping, shop management, and the role of the mechanic; tools, fasteners, and general shop operations with an introduction to trucks, buses, and motor coaches.
Chassis Components
Clock Hours
Remove and replace vehicle clutch, repack and adjust wheel bearings, disassemble and reassemble 3- and 4-speed transmissions; disassemble, reassemble, and adjust differential assembly; diagnose and repair chassis and suspension components including air suspension systems.
Clock Hours
Service batteries, troubleshoot and repair vehicle wiring and lighting systems; service ignition systems, including tune-up, timing, and repair; explain the basic theory of ignition system operations; service starters, including bench testing rebuilt units; explain theory of starting system operations and generator/regulator system operations; service alternators, including bench testing rebuilt units; explain theory of alternator system operation, use scan tools and scopes to diagnose system operation and malfunction, includes electronic fuel systems and advance drivability diagnosis.
Clock Hours
Describe the construction, operation, inspection, and maintenance of the standard transmission; describe service procedures for standard transmissions; describe the construction, operation, inspection, and maintenance of the automatic transmission; and service a standard and an automatic transmission.
Clock Hours
Identify different diesel engines, explain the basics of diesel engine functions, demonstrate basic repair practices, disassemble engines, clean and inspect all parts, inspect and measure all parts for wear using manufacturers’ specifications, explain camshaft and valve train functions, measure or replace valve guides, replace engine bearings and measure clearance, install cylinder liners, fit pistons to connecting rods, correctly install piston rings, assemble engine and all associated parts, test run and adjust engine to specifications, troubleshoot various engine problems.
Fuel Systems
Clock Hours
Inspect fuel systems, identify fuel system components, understand fuel system flow, demonstrate fuel filter replacement, demonstrate fuel system bleeding procedure, troubleshoot fuel system problems, install and time fuel injection pumps, remove and install fuel injectors, clean and adjust fuel injectors, a basic understanding of computer-controlled injection pumps and fuel injectors.
Engine Cooling and Lubrication
Clock Hours
Explain Automated Precision, Inc. oil classification system, working knowledge of oil filters and filtration systems, working knowledge of oil pumps and oil supply, understand oil coolers. Correctly identify all parts of the cooling system, understand functions of a water pump and pump development, understand workings of a thermostat, inspect and test heat exchangers, and correct use of antifreeze.
Intake and Exhaust Systems
Clock Hours
Understand intake manifolds, air filters, and air filtration system; inspect and service air intake systems. Identify exhaust system components, diagnose leaks and repair. Understand and service Tier 4 DPF Urea systems and filters. Understand the function of and service the turbocharger and EGR systems.
Clock Hours
Remove and replace track on crawler tractor, disassemble and reassemble final drive on crawler tractor; remove, repair, and install swing frames on a crawler tractor; replace cutting edges on blade, use torch, porta-power, and/or hydraulic press to straighten parts on equipment; jack up and install blocking or jack stands on heavy equipment.
Education/Technical Knowledge
Clock Hours
Write up and research parts list; carry out instructions furnished in written, oral, or diagrammatic form; read manuals and apply to work situation; apply mechanics math as required.
Engine Controls
Clock Hours
Covers cab and body systems, HVAC service, and diagnosis of refrigerant types and regulations.
Cab/Body Systems
Clock Hours
Covers cab and body systems, HVAC service, and diagnosis of refrigerant types and regulations.
Applied Math
Clock Hours
The applied math class will build from reviewing basic skills to specific math used in the Diesel/Heavy Equipment trade. The class focuses on helping students learn, understand and practice these necessary skills.