Heavy Diesel Service Technician

Program Overview

The Heavy Diesel Service Technician certificate program provides training in both theory, diagnosis, and repair of basic systems on diesel engines and diesel equipment.  Program instruction includes shop safety, shop equipment, diesel engines and fuel systems, electrical and electronic systems, off road power trains, and heavy equipment hydraulics.  Successful completion of this program will prepare the student for entering industry as an entry level diesel service technician.

Students who complete this program have participated in a training program that was certified by the National Institute for Automotive Service Excellence.

Students may enter the Heavy Diesel Service Technician program any semester.  A full-time student can complete this program in 3 semesters.  To graduate, students must earn a minimum of 32 semester credit hours. 

Career Traits/Requirements

Individuals wanting to enroll in the Heavy Diesel Service Technician program must have good eyesight, manual dexterity, hand eye coordination, critical thinking skills, problem solving skills, math skills, and the ability to apply technology to the work environment.

View Advisement Guide Sheet

Offered at the Following Campus

South Campus (Dublin)

    Salary Potential

    $15,000 - $20,000

    Program Costs

    Tuition & Fees: $3,615.00
    Books & Supplies: $900.00
    (Costs are estimated and are subject to change.)

    Georgia's Strategic Industries Workforce Development Grant (SIWDG):

    Beginning Fall Semester 2014, this program will qualify for the Strategic Industrial Workforce Development Grant.  To qualify, a TCSG student must be fully admitted to the college and receive the HOPE Grant for the same term.  

    The amount of SIWDG award is a fixed amount for each term of enrollment:

    • 9 or more credit hours = $500/term
    • 3-8 credit hours = $250/term
    • 1-2 credit hours = $125/term
    • Commercial Truck Driving = $1,000 one time award

    High School students in dual enrollment and joint enrollment are NOT eligible.

    Employment Opportunities

    Graduates are prepared for employment as an entry-level diesel service technician.

    For more information about our graduation rates, the median debt of students who completed the program, and other important information, please view OFTC's gainful employment data for this program.  Due to the number of graduates in Academic Year 2014, Gainful Employment data is not available for this program.

    Admission Requirements

    • Submit a completed application and application fee;
    • Be at least 16 years of age;
    • Submit official high school transcript or GED transcript;
    • Submit official college transcripts, if applicable;
    • Meet assessment requirements by taking the ASSET or COMPASS placement test. In lieu of the placement test, official scores on the SAT, CPE, or ACT may be substituted.


    Credit Hours
    Contact Hours
    Occupational Courses
    Prerequisites: Provisional Admission; Corequisites: None

    This course introduces basic knowledge and skills the student must have to succeed in the Diesel Equipment Technology field. Topics include an overview of diesel powered vehicles, diesel technology safety skills, basic tools and equipment, reference materials, measuring instruments, shop operation, mechanical fasteners, welding safety, and basic welding skills. Classroom and lab experiences on safety, precision measuring, and basic shop practices are highly emphasized.

    Prerequisites: None; Corequisites: DIET 1000

    This course introduces students to electrical and electronic systems used on medium/heavy duty trucks and heavy equipment. Topics include: general electrical system diagnosis, battery diagnosis and repair, starting system diagnosis and repair, charging system diagnosis and repair, lighting system diagnosis and repair, gauges and warning devices, and an introduction and familiarization with electrical and electronic systems.

    Prerequisites: None; Corequisites: DIET 1010

    This course introduces diesel engines used in medium/heavy duty trucks and heavy equipment. Topics include: general engine diagnosis, cylinder head and valve train, engine block, engine lubrication system, hydraulic pumps, engine cooling, air induction, exhaust, fuel supply systems, electronic fuel management, and engine brakes. Using and interpreting test and measuring equipment is highly emphasized.

    Prerequisites: None; Corequisites: DIET 1000

    This course introduces the student to basic hydraulic fundamentals, components, system servicing, symbols and schematics. The student will learn component operation and service techniques for maintaining a hydraulic system. The student will also learn to identify the ISO symbols used on hydraulic schematics and to trace the hydraulic schematics. Topics include: general system operation; basic hydraulic principles; hydraulic system components; hydraulic control valves; load sensing pressure control systems; pilot operated hydraulic system operation; and hydraulic actuators.

    Prerequisites: None; Corequisites: DIET 1000, DIET 1010

    This course introduces power trains used on heavy equipment such as bulldozers, excavators, wheel loaders, back-hoe loaders and skidders. Classroom and lab instruction on components and systems with use and interpreting testing and diagnosing equipment are highly emphasized. Topics include: power train theory and principles, clutches, manual transmissions, drive shafts, differentials, final drives, special drives, final drive failure analysis, torque converters, hydraulically shifted transmissions, electronic transmissions, hydrostatic transmissions, and transmission failure analysis.

    and one of the following:
    Prerequisites: None; Corequisites: DIET 1010

    This course introduces systems used in medium/heavy duty trucks and heavy equipment. Classroom instruction on HVAC theory and operation along with local, state, and federal regulations are strongly emphasized. Topics include: HVAC safety, HVAC system theory and operation, A/C system component diagnosis and repair, HVAC system diagnosis and repair, HVAC operating systems and related controls, and refrigeration recovery, recycling, and handling procedures.

    Prerequisites: DIET 1000, DIET 1010, DIET 1030; Corequisites: None

    This internship provides the student work experience in the occupational environment.  Topics include:  application of prerequisite knowledge and skills, problem solving, adaptability to job setting equipment and technology, and development of productivity and quality job performance through practice.  The student's internship experience may be implemented through the use of written individualized training plans, written performance evaluations, and required integrative experiences at the internship site.

    Credit Hours: 32 - 33
    Contact Hours: 919 - 1009
    Designations indicate course delivery method in selected term: Online=OL, Web Enhanced=W, Hybrid=H, Traditional=T.