HOW THE BRAKE SYSTEM WORKS
Before there were seat belt, air bags, power brakes and anti-lock brakes, there were always brakes. Brakes are the primary safety feature on your vehicle.

Master Cylinder: When your are stepping on your brake pedal you are pushing brake fluid threw your brake lines down to each of your wheels the pistons in your master cylinder creates pressure which allows you to stop.

Disc Brakes: When you step on the brake pedal, the brake fluid becomes pressurized. This pressure causes the caliper piston to extend which pushes the outer brake pad against the rotor. Then the caliper shifts outward sliding on the caliper mounting bolt and disc hardware forcing the inner brake pad against the rotor. This sandwiching effect creates friction against the turning rotor, which stops your vehicle. When you release the brake pedal the caliper seal pulls the piston back and retracts the pad away from the rotor and the caliper sifts inward to it's original position.

Drum Brakes: When you step on the brake pedal the brake fluid becomes pressurized. This pressure forces the wheel cylinder pistons to extend outward forcing the primary and secondary shoes against the drum creating friction against the turning drum which stops your vehicle. When you release the brake pedal the return springs pull the shoes away from the drum returning the shoes to their original position.