Revised 01/2010

DSL 152 - Diesel Power Trains, Chassis, and Suspension (4 CR.)

Course Description

Studies the chassis, suspension, steering and brake systems found on medium and heavy-duty diesel trucks. Covers construction features, operating principles and service procedures for such power train components as clutches, multi-speed transmissions, propeller shafts, and rear axles. Teaches operations of modern equipment to correct and adjust abnormalities. Lecture 2 hours. Laboratory 4 hours. Total 6 hours per week.

General Course Purpose

This course is designed to provide the student with a comprehensive knowledge of medium/heavy-duty truck steering systems, front and rear suspension, front and rear axle alignment, transmissions and drivetrain components, and various types of truck chassis. Emphasis is placed upon suspension inspection, troubleshooting techniques, repair, and adjustment.

Course Prerequisites/Corequisites

Ability to read, write, and speak the English language.

Course Objectives

Upon completion of this course, the student will be able to:

  • Explain how a pinion and crown gearset change the direction of powerflow.
  • Identify the types of axles used on trucks and trailers.
  • Describe how steering and axle alignment affect tire wear, directional stability, and handling.
  • Identify the components in a truck driveline.
  • Explain the importance of drive shaft phasing.
  • Identify the components of the steering system.
  • Identify and describe the types of suspension systems used on current trucks.
  • Identify the wheel configurations used on heavy-duty trucks.
  • Outline the operating principles of a clutch.
  • Identify the types of gears used in truck transmissions.
  • Explain the relationship between speed and torque from input to output in different gear arrangements.

Major Topics to Be Included

  • Transmissions and Clutches
  • Steering and Suspension Systems
  • Wheels and Tires
  • Axles, Differential Assy. and Driveshafts
  • Fifth wheels and chassis
  • Suspension and steering system designs
  • Steering and suspension system inspections