Brake Systems & Basic Hydraulics A History of Braking How do you stop a Stage Coach? No Matter the how you stop it! Friction – the resistance between two moving parts! Is the Key!

Basic Hydraulics “Pascal's Law” Pressure exerted upon a mass of liquid in a closed container, transmits that pressure in all directions! 3000 lbs 3000 lbs 3000 lbs 100 lbs 500 lbs 3000 lbs 100 lbs 500 lbs 500 lbs 3000 lbs 3000 lbs

Basic Hydraulics “Pascal's Law” ½” 2” ½” 1” ½” 1” 1” Transmits Motion Also! ½” 2” ½” 1” ½” 1” 1” Volume down must equal volume up ! Down Diameter 1” Up Diameters ½” 1” Diameter Each Down Diameter 1” Up Diameter 2”

Pascal Law & Automotive Braking

Hydraulic Brake Components Single Cylinder Master Cylinder Dual Cylinder Master Cylinder Master Cylinder Pedal Pressure

Hydraulic Brake Components Proportioning Valve Wheel Cylinder

Hydraulic Brake Components Brake Caliper

Bleeding the Hydraulics With a Pressure Bleeder Manual Bleeding “DOWN” “UP” “Open” “Close” No More Air Pockets “Repeat at other wheels” Remember to Check fluid in Master Cylinder

Drum Brakes Anchor Pin Secondary Shoe Wheel Cylinder Brake Drum Brake Shoes Return Springs Brake Shoe Retainer Primary Shoe

Drum Brakes Manual Adjusting Self Adjusting Parking Brake

Pressure exerted over a larger surface area per PSI means Disk Brakes Disk Brake Pads Basic Operation Caliper Types Pressure exerted over a larger surface area per PSI means “BETTER BRAKING”

Disk Brakes Disk Brake Advantages Disk Brake Disadvantages - better braking - cost more, initial & replacement less parts - wet splash - easy replacement - parking brake problems - easy wear inspection - better cooling - no adjustment required

Power Brakes

ABS Brakes Anti Lock Brake System

Brake Demo’s Replacing Brake Pads Wheel Cylinder Honing Replacing Brake Shoes Replacing Brake Pads Wheel Cylinder Honing Machining a Drum Machining a Rotor