Standard

 

AUT 130 - AUTOMOTIVE BRAKE SYSTEMS

Course Description

Introduces Brake systems theory and its application to automotive systems.  Topics include:  hydraulic system diagnosis and repair; drum brake diagnosis and repair; disc brake diagnosis and repair; power assist units diagnosis and repair; miscellaneous ( wheel bearings, parking brakes, electrical, etc.) diagnosis and repair.

 

Competency Areas

Hours

 

Hydraulic System Diagnosis and Repair

Class

3

Drum Brake Diagnosis and Repair

D. Lab

0

Disc Brake Diagnosis and Repair

P. Lab/O.B.I.

3

Power Assist Units Diagnosis and Repair

Credit

4

Miscellaneous (Wheel Bearings, Parking Brakes, Electrical, Etc.) Diagnosis and Repair

 

 

 

 

 

 

 

 

 

 

 

Prerequisite:

AUT 122

Corequisite:

 

 

Course Guide

 

Competency

After completing this section, the student will:

Hours

Class

D.Lab

P.Lab/

O.B.I.

Hydraulic System Diagnosis and Repair

  6   

     

   6  

 

Measure and adjust pedal height.

 

Check master cylinder for internal and external leaks and proper operation; determine necessary action.

 

Remove, bench bleed, and reinstall master cylinder.

 

Diagnose poor stopping, pulling or dragging concerns caused by problems in the hydraulic system; determine necessary action.

 

Inspect brake lines, flexible hoses, and fittings for leaks, dents, kinks, rust, cracks, bulging or wear; tighten loose fittings and supports; determine necessary action.

 

Fabricate and install brake lines (double flare and ISO types); replace hoses, fittings, and supports as needed.

 

Select, handle, store, and install brake fluids to proper level.

 

Inspect, test, and replace metering (hold-off), proportioning (balance), pressure differential, and combination valves.

 

Inspect, test, replace, and adjust height (load) sensing proportioning valve.

 

Inspect, test, and replace components of brake warning light system.

 

Bleed (manual, pressure, vacuum or surge) brake system.

 

Flush hydraulic system.

 

 

 

Drum Brake Diagnosis and Repair

  8   

     

  8   

 

Diagnose poor stopping, noise, pulling, grabbing, dragging or pedal pulsation concerns; determine necessary action.

 

Remove, clean (using proper safety procedures), inspect, and measure brake drums; service or replace as needed.

 

Mount brake drum on lathe; machine braking surface.

 

Remove, clean, and inspect brake shoes, springs, pins, clips, levers, adjusters/self-adjusters, other related brake hardware, and backing support plates; lubricate and reassemble.

 

Remove, inspect, and install wheel cylinders.

 

Pre-adjust brake shoes and parking brake before installing brake drums or drum/hub assemblies and wheel bearings.

 

Install wheel, torque lug nuts, and make final checks and adjustments.

 

 

 

Disc Brake Diagnosis and Repair

  6   

     

  6   

 

 

 

 

 

 

 

Diagnose poor stopping, noise, pulling, grabbing, dragging or pedal pulsation concerns; determine necessary action.

 

Remove caliper assembly from mountings; clean and inspect for leaks and damage to caliper housing; determine necessary action.

 

Clean and inspect caliper mounting and slides for wear and damage; determine necessary action.

 

Remove, clean, and inspect pads and retaining hardware; determine necessary action.

 

Disassemble and clean caliper assembly; inspect parts for wear, rust, scoring, and damage; replace seal, boot, and damaged or worn parts.

 

Reassemble, lubricate, and reinstall caliper, pads, and related hardware; seat pads, and inspect for leaks.

 

Reassemble, lubricate, and reinstall caliper, pads, and related hardware; seat pads, and inspect for leaks.

 

Refinish rotor according to manufacturer’s recommendations.

 

Adjust calipers with integrated parking brake system.

 

Install wheel, torque lug nuts, and make final checks and adjustments.

 

Remove and replace rotor.

 

 

 

Power Assist Units Diagnosis and Repair

  6   

     

  6   

 

Test pedal free travel with and without engine running; check power assist operation.

 

Check vacuum supply (manifold or auxiliary pump) to vacuum-type power booster.

 

Inspect the vacuum-type power booster unit for vacuum leaks; inspect the check valve for proper operation; determine necessary action.

 

Inspect and test hydro-boost system and accumulator for leaks and proper operation; determine necessary action..

 

 

 

Miscellaneous (Wheel Bearings, Parking Brakes, Electrical, Etc.) Diagnosis and Repair

4

     

  4   

 

Diagnose wheel bearing noises, wheel shimmy, and vibration concerns; determine necessary action. 

 

Remove, clean, inspect, repack, and install wheel bearings and replace seals; install hub and adjust wheel bearings.

 

Check parking brake cables and components for wear, rusting, binding, and corrosion; clean, lubricate, and replace as needed.

 

Check parking brake operation; adjust as needed.

 

Check operation of parking brake indicator light system.

 

Check operation of brake stop light system; adjust and service as needed.

 

Replace wheel bearing and race.

 

 

 

 

 

 

 

 

Suggested Resources

 

 

Books

 

Duffy, J. E.  (2000).  Modern AutomotiveTechnology.  South Holland, IL: Goodheart-Willcox.

Erjavec, J.  (2000).  Automotive Technology (3rd ed.).  Albany, NY: Delmar.

Erjavec, J.  (2000).  Automotive Technology Workbook (3rd ed.).  Albany, NY: Delmar.

Gilles, T. (1999). Automotive Service Inspection, Maintenance, and Repair (1st ed.). Albany, NY: Delmar

Toboldt, W. K., & Johnson, L.  (1995).  Automotive Encyclopedia.  South Holland, IL: Goodheart-Willcox.

Webster, J., & Owen, C. E.   (2000).    Basic Automotive Service & Systems (2nd ed.).

           Albany, NY: Delmar.