You’re driving along when the car in front of you suddenly slams on their brakes. Your foot shoots out for the brake pedal and you hear a loud screeching noise as your worn brakes attempt to stop your car. Don’t be caught off guard without proper working brakes! Brake pads are one of the highest wearable parts of your car, truck or SUV. Properly working brakes are also one of the most important parts on your vehicle and do a lot to keep you safe. Don’t put off a brake inspection till you hear or notice something not quite right. Waiting to service and or repair brake pads can cause further damage and safety concerns. It’s cheaper and faster to replace brake pads before further damage occurs. Disc brakes usually include a part called a wear indicator. A wear indicator is a small piece of metal attached to the brake pad that contacts the brake rotor when the pad material has been worn down to a certain level. When the wear indicator grinds against the rotor, it makes a squealing noise as you apply the brakes. This noise is a signal which tells you it’s time to have your brakes examined.
If you’re not sure if it’s time for your car or truck brakes to be serviced or replaced, come on by for a quick brake inspection.
The brake system is actually composed of two kinds of systems: hydraulics and friction materials. Here’s what happens within these systems between the time your foot hits the brake pedal and your car stops:
Hydraulics
Master Cylinder
When pressure is applied to the brake pedal the master cylinder creates hydraulic pressure which pushes brake fluid to the wheel brakes.
Brake Lines and Hoses
Steel brake lines and high pressure rubber hoses are the avenues through which the pressurized brake fluid travels.
Wheel Cylinders and Calipers
These are the hydraulic cylinders that apply pressure to the friction materials, causing your car to stop.
Friction Materials: Disc Brake Pads and Drum Brake Shoes
These brake linings are composed of high temperature materials that create the friction that stops your car.
Types of Brakes:
Disc Brakes
Disc brakes consist of a disc brake rotor, which is attached to the wheel, and a caliper, which holds the disc brake pads. Hydraulic pressure from the master cylinder causes the caliper piston to clamp the disc brake rotor between the disc brake pads. This creates friction between the pads and rotor, causing your car to slow down or stop.
Drum Brakes
Drum brakes consist of a brake drum attached to the wheel, a wheel cylinder, brake shoes and brake return springs. Hydraulic pressure from the master cylinder causes the wheel cylinder to press the brake shoes against the brake drum. This creates friction between the shoes and drum to slow or stop your car.
Parking Brake
The parking brake uses cables to mechanically apply the brakes (usually the rear brake.) This is used to prevent the car from rolling when not being driven.
Anti-Lock Brakes: A System Built For Safety
Computer-controlled anti-lock braking systems (ABS) are a recently developed safety feature. When sudden stops are made, the ABS prevents wheel lock-up. The system is comprised of wheel-speed sensors that monitor wheel rotation, computer-controlled hydraulics that pulse the brakes on and off rapidly, and the on-board computer.
