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DSL 201 Preventive Maintenance I

This course prepares the student to perform preventative maintenance inspections on medium/heavy duty trucks in the areas of brakes, steering suspension and drivetrain. Laboratory exercises include inspection and maintenance on medium/heavy duty trucks and related accessory systems that meet or exceed DOT standards.

Credits

4

Prerequisite

Prerequisites: (Test score or ENG 102 or higher or concurrent) and AUT 102 and AUT 103 and AUT 104

See Course Syllabus

Course Number and Title:

DSL 201 Preventive Maintenance I

Campus Location

  • Georgetown

Prerequisites

Prerequisites: (Test score or ENG 102 or higher or concurrent) and AUT 102 and AUT 103 and AUT 104

Course Credits and Hours

4 credit(s)

2 lecture hours/week

6 lab hours/week

Course Description

This course prepares the student to perform preventative maintenance inspections on medium/heavy duty trucks in the areas of brakes, steering suspension and drivetrain. Laboratory exercises include inspection and maintenance on medium/heavy duty trucks and related accessory systems that meet or exceed DOT standards.

Additional Materials

Safety glasses

Required Text(s)

Obtain current textbook information by viewing the campus bookstore - https://www.dtcc.edu/bookstores online or visit a campus bookstore. Check your course schedule for the course number and section.

Disclaimer

None

Core Course Performance Objectives (CCPOs)

  1. Analyze air brake-service braking systems and determine necessary action. (1, 2, 3, 4, 5, 6; PGC 1, 2, 3, 4, 5)
  2. Analyze air brake-parking brake systems and determine necessary action. (CCC 1, 2, 3, 4, 5, 6; PGC 1, 2, 3, 4, 5)
  3. Analyze various steering system components to determine necessary action. (CCC 1, 2, 3, 4, 5, 6; PGC 1, 2, 3, 4, 5)
  4. Demonstrate proper wheel alignment analysis as it pertains to medium/heavy trucks. (CCC 1, 2, 3, 4, 5, 6; PGC 1, 2, 3, 4, 5)
  5. Perform service on wheels and tires for medium/heavy trucks. (CCC 1, 2, 3, 4, 5, 6; PGC 1, 2, 3, 4, 5)
  6. Evaluate various clutch assemblies and transmissions for medium/heavy trucks and perform service as needed. (CCC 1, 2, 3, 4, 5, 6; PGC 1, 2, 3, 4, 5)
  7. Identify various drive axles, driveshaft and universal joints on medium/heavy trucks and perform service as needed. (CCC 1, 2, 3, 4, 5, 6; PGC 1, 2, 3, 4, 5)

See Core Curriculum Competencies and Program Graduate Competencies at the end of the syllabus. CCPOs are linked to every competency they develop.

Measurable Performance Objectives (MPOs)

Upon completion of this course, the student will:

  1. Analyze air brake-service braking systems and determine necessary action.         
    1. Utilize vehicle service information, including fluid type, vehicle service history, service precautions, technical service bulletins, and adhere to simulated shop procedures.
    2. Explain and differentiate between various air brake system designs.
    3. Identify brake system components and configurations (including air and hydraulic systems, parking brake, power assist, and vehicle dynamic brake systems).
    4. Check air supply system components such as compressor, governor, air drier, tanks, , lines; inspect service system components such as lines, fittings, mountings, valves (hand brake/trailer control, brake relay, quick release, tractor protection, emergency/spring brake control/modulator, pressure relief/safety) to determine needed action.
    5. Inspect and test air tank relief (safety) valves, one-way (single) check valves, two-way (double) check valves, drain valves, camshafts (S-cams), tubes, rollers, bushings, seals, shields, anchor pins, and springs and perform service as needed.
    6. Check brake drum and rotor, clean and inspect mounting surface, measure brake diameter, measure brake lining thickness, and inspect brake lining condition to determine needed action.
    7. Troubleshoot concerns related to the mechanical/foundation brake system including poor stopping, brake noise, premature wear, pulling, grabbing, or dragging to determine needed action.
  2. Analyze air brake-parking brake systems and determine necessary action.    
    1. Utilize vehicle service information, including fluid type, vehicle service history, service precautions, and technical service bulletins and adhere to simulated shop procedures.
    2. Check parking (spring) brake chamber, check valves, lines, hoses, fittings, parking (spring) brake application and release valve to determine necessary action.
    3. Perform manual release (cage) and reset (uncage) parking (spring) brakes.
    4. Test brake assist/booster system (vacuum or hydraulic) hoses, control valves to determine necessary action.
    5. Identify concerns related to the power assist system (vacuum or hydraulic), including stopping problems caused by the brake assist/booster system and determine needed action.
  3. Analyze steering system components to determine necessary action.
    1. Perform required supplemental restraint system (SRS)testing and verify indicator lamp operation.
    2. Check steering wheel for free play, binding, and proper centering; inspect and service steering shaft U-joint(s), slip joint(s), bearings, bushings, seals and phase steering shaft.
    3. Inspect, service, repair, and/or replace tie rod ends, ball joints, kingpins, pitman arms, idler arms, replace leaf springs, center bolts, clips, pins, bushings, shackles, U-bolts, insulators, brackets, and mounts to determine needed action.
    4. Inspect and repair/replace axle and axle aligning devices such as radius rods, track bars, stabilizer bars, and torque arms
    5. Inspect related bushings, mounts, shims and attaching hardware to determine needed action.
    6. Troubleshoot rough ride problems.
    7. Explain steering pump and gear unit operation and service.
    8. Inspect power steering pump and gear operation, mountings, lines, and hoses to determine necessary action
    9. Check fluid level, fluid condition and service filter to determine necessary action.
    10. Inspect, test, repair, and/or replace air suspension pressure regulator and height control along with related components and measure and record ride height.
  4. Demonstrate proper wheel alignment analysis as it pertains to medium/heavy trucks.
    1. Demonstrate understanding of alignment angles.
    2. Identify causes of vehicle wandering, pulling, shimmy, hard steering, and off-center steering wheel problems.
    3. Check and record camber, caster and adjust toe settings.
    4. Identify turning/Ackerman angle (toe-out-on-turns) problems.
    5. Verify front axle alignment (centerline).
  5. Perform service on wheels and tires for medium/heavy trucks.
    1. Explain wheels and tire operation and service for medium/heavy trucks.
    2. Inspect tire condition, wear patterns and tread depth to determine necessary action.
    3. Verify tire matching and set tire pressure.
    4. Identify wheel/tire vibration, shimmy, pounding, and hop (tramp) problems; determine needed action.  
    5. Check wheel mounting hardware; check wheel condition; remove and install wheel/tire assemblies (steering and drive axle); torque fasteners to manufacturer's specification using torque wrench. 
    6. Inspect tire and wheel for proper application; determine needed action.       
    7. Perform wheel and tire service to include wheel balancing.
  6. Evaluate various clutch assemblies and transmissions for medium/heavy trucks and perform service as needed. 
    1. Inspect and adjust clutch and related components to determine necessary action.
    2. Check pedal height and travel to determine needed action.
    3. Inspect clutch master cylinder fluid level and fluid condition.
    4. Check clutch hydraulic system components for leaks and damage and determine necessary action.
    5. Inspect, adjust, lubricate, or replace release (throw-out) bearing, sleeve, bushings, springs, housing, levers, release fork, fork pads, rollers, shafts, and seals.
    6. Inspect, adjust, and/or replace single-disc clutch pressure and two-plate clutch pressure plate, clutch discs, intermediate plate, and drive pins/lugs.
    7. Check clutch brake assembly to determine needed action.
    8. Inspect transmission shifter and linkage; inspect and/or replace transmission mounts, insulators, and mounting bolts.
    9. Inspect and test function of REVERSE light, NEUTRAL start, and warning device circuits; determine needed action.
    10. Troubleshoot causes of transmission noise, shifting concerns, lockup, jumping out-of-gear, overheating, and vibration problems.
    11. Inspect operation of automatic transmission components, and controls.
    12. Troubleshoot automatic transmission system problems to determine needed action.
  7. Identify various drive axles, driveshaft and universal joints on medium/heavy trucks.
    1. Explain various drive axles, driveshaft and universal joints operation and service.
    2. Inspect, service, and/or replace driveshafts, and related components to determine necessary action
    3. Inspect driveshaft center support bearings and mounts and determine needed action.
    4. Check and repair drive axle housing fluid leaks.
    5. Check drive axle fluid level and condition to determine necessary action.
    6. Inspect and/or adjust air-operated power divider (inter-axle differential) assembly and related components.
    7. Troubleshoot causes of drive axle(s) drive unit noise and overheating problems.

Evaluation Criteria/Policies

The grade will be determined using the Delaware Tech grading system:

90-100 = A
80-89 = B
70-79 = C
0-69 = F
Students should refer to the Catalog/Student Handbook for information on the Academic Standing Policy, the Academic Integrity Policy, Student Rights and Responsibilities, and other policies relevant to their academic progress.

Final Course Grade

Calculated using the following weighted average

Evaluation Measure

Percentage of final grade

Summative- (4-6) Tests (equally weighted)

20 %

Summative-(7-10) Quizzes (equally weighted)

20 %

Summative/Formative- Minimum 10 Repair Orders/Worksheets (equally weighted)

30%

Summative Assessments - Minimum 2 Practical Assessments (equally weighted) 

30%

TOTAL

100%

Program Graduate Competencies (PGCs are the competencies every graduate will develop specific to his or her major)

  1. Use appropriate diesel diagnostic and service equipment, hand tools, and precision measuring devices to determine and perform the proper repair as necessary.
  2. Interpret diesel electronic service information, service manuals, and diagnostic charts.
  3. Document service repair procedures that accurately reference the 3Cs:
    1. Customer complaint verification
    2. Correct the problem
    3. Complete the repair
  4. Employ proper diesel industry service facility safety practices.
  5. Practice professional conduct as required in the diesel industry.

Core Curriculum Competencies (CCCs are the competencies every graduate will develop)

  1. Apply clear and effective communication skills.
  2. Use critical thinking to solve problems.
  3. Collaborate to achieve a common goal.
  4. Demonstrate professional and ethical conduct.
  5. Use information literacy for effective vocational and/or academic research.
  6. Apply quantitative reasoning and/or scientific inquiry to solve practical problems.

Students in Need of Accommodations Due to a Disability

We value all individuals and provide an inclusive environment that fosters equity and student success. The College is committed to providing reasonable accommodations for students with disabilities. Students are encouraged to schedule an appointment with the campus Disabilities Support Counselor to request an accommodation needed due to a disability. The College's policy on accommodations for persons with disabilities can be found in the College's Guide to Requesting Academic Accommodations and/or Auxiliary Aids Students may also access the Guide and contact information for Disabilities Support Counselors through the Student Resources web page under Disabilities Support Services, or visit the campus Advising Center.

Minimum Technology Requirements

Minimum technology requirements for all distance education type courses.

Academic Integrity

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Cell phone/Electronic Device

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Tuition Adjustment Policy

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