Auto Upkeep Basic Car Care, Maintenance, and Repair (2nd Edition) Chapter 1 - Introduction and How Cars Wor Auto Upkeep Basic Car Care, Maintenance, and Repair (2nd Edition) Chapter 14 Suspension, Steering, and Tires Chapter 14 © 2007 Rolling Hills Publishing www.AutoUpkeep.com

Chapter 1 - Introduction and How Cars Wor Fuel for Thought What would it feel like to ride in a vehicle that did not have a suspension system? Why might the steering wheel of a vehicle pull to one side? How are tires designed to help you determine when they are worn out? Chapter 14 © 2007 Rolling Hills Publishing www.AutoUpkeep.com

© 2007 Rolling Hills Publishing www.AutoUpkeep.com Objectives Upon completion of this chapter and activities, you will be able to: Define the purpose and identify the functions of the suspension system. Define the purpose and identify the functions of the steering system. Discuss the importance of tires and explain their ratings. Inspect suspension and steering components. Inspect and rotate tires. Chapter 14 © 2007 Rolling Hills Publishing www.AutoUpkeep.com

Suspension System Purpose Control the up and down movement of the vehicle. Keeps the tires in contact with the road. Chapter 14 © 2007 Rolling Hills Publishing www.AutoUpkeep.com

Suspension Components Frame or unibody Shocks Springs Struts Chapter 14 © 2007 Rolling Hills Publishing www.AutoUpkeep.com

Steering System Purpose The steering system controls the directional movements of the vehicle. Chapter 14 © 2007 Rolling Hills Publishing www.AutoUpkeep.com

Steering System Components Steering wheel Steering linkage Power steering pump Some are electric Chapter 14 © 2007 Rolling Hills Publishing www.AutoUpkeep.com

© 2007 Rolling Hills Publishing www.AutoUpkeep.com Tire Classifications Tread Design M + S Snow Tire Sizes Chapter 14 © 2007 Rolling Hills Publishing www.AutoUpkeep.com

© 2007 Rolling Hills Publishing www.AutoUpkeep.com Tire Classifications Tire Plies Tire Grading Treadwear Traction Temperature Chapter 14 © 2007 Rolling Hills Publishing www.AutoUpkeep.com

© 2007 Rolling Hills Publishing www.AutoUpkeep.com Tire Classifications Light Truck Tire Load Range Chapter 14 © 2007 Rolling Hills Publishing www.AutoUpkeep.com

© 2007 Rolling Hills Publishing www.AutoUpkeep.com Tire Classifications Run Flat Tires Self-sealing Self-supporting Tire/wheel combination systems Chapter 14 © 2007 Rolling Hills Publishing www.AutoUpkeep.com

Tire Care and Maintenance Tire wear Chapter 14 © 2007 Rolling Hills Publishing www.AutoUpkeep.com

Tire Care and Maintenance Tire Wear Indicator Bars Set at 2/32nds of an inch (1.6 mm) Chapter 14 © 2007 Rolling Hills Publishing www.AutoUpkeep.com

Tire Care and Maintenance Tire Rotation Chapter 14 © 2007 Rolling Hills Publishing www.AutoUpkeep.com

Tire Care and Maintenance Torque lug nuts in a star pattern Chapter 14 © 2007 Rolling Hills Publishing www.AutoUpkeep.com

Tire Care and Maintenance Tire Repairs Use a patch/plug combination – requires removal of tire from wheel Do not repair sidewalls Tire Pressure Monitoring System Monitors tire pressure Required on vehicles built on or after Sept 1st, 2007 Chapter 14 © 2007 Rolling Hills Publishing www.AutoUpkeep.com

Tire Care and Maintenance Always refer to the tire placard for tire pressure information Chapter 14 © 2007 Rolling Hills Publishing www.AutoUpkeep.com

© 2007 Rolling Hills Publishing www.AutoUpkeep.com Summary The suspension system absorbs bumps in the road to give you a smooth ride. The steering system allows the operator to control left and right motions of the vehicle. Tires provide the traction (adhesive friction) necessary for maneuvering. Chapter 14 © 2007 Rolling Hills Publishing www.AutoUpkeep.com