Activity Industry Sector

Activity Originally Created By: MaryRose Lovgren

Introduction to Brake System Hydraulics

Part of Lesson Plan: Brake System Operation (updated) By Ken Hamel

Activity Overview / Details

Students are split into teams of four.  Each team is given a vehicle and a set of tools and I place two students on each side of the vehicle.

The instructor begins the lesson by describing the master cylinder and its function in the brake system. The instructor should also cover how to diagnose a defective master cylinder. (At this point I don't spend much time on the brake booster other than quickly explaining its basic function because my goal in this lesson is to have the students become familiar with the components at the wheel assemblies.)

The instructor then has the students follow the routing of the brake lines and hoses to the wheel assemblies. During the process inspection of each component should be covered.

Activity Details

Following along with the instructor, ( who will be demonstrating on either a portable trainer or another vehicle) the students will identify and inspect each of the major components in the vehicle braking system. Half of the class will be working on drum brakes and the other  half will be working on disc brakes. Students will operate the vehicles hydraulic system in order to learn how hydraulic force is used to transfer force from the output cylinder (master cylinder) to the input cylinder (wheel cylinders). Students also will also be able to see how the hydraulic force is multiplied by increasing the diameter of the input cylinder without changing the size of the output cylinder or the amount of force applied to the system.

Familiarize students with brake system components


Assessment Types:
Demonstrations, Observations,

Students will be able to correctly name and identify the major components of the brake system to the instructor. Students will also be able to demonstrate the function of each.  Students will also  correctly show how to inspect each component and identify those which need repair or replacement.

Students are required to be able to do this with 100% accuracy.