Air Brakes Study Tool

The mechanic himself must use this to adjust the brakes

• Manual slack adjuster

• Foundation brake

• Air Drier

• Glad-Hands

Consists of : spider, brake shoes and lining, rollers, s-cam, return spring.

• Manual slack adjuster

• Foundation brake

• Air Drier

• Glad-Hands

Cleans and removes water vapor, dirt, and oil from the air system.

• Manual slack adjuster

• Foundation brake

• Air Drier

• Glad-Hands

Quick connect or disconnect to trailer.

• Manual slack adjuster

• Foundation brake

• Air Drier

• Glad-Hands

This part adjusts the brakes without the help of a mechanic.

• Automatic slack adjuster

• Foot valve

• Double check valve

• Clevis and pin

Controls the service brakes.

• Automatic slack adjuster

• Foot valve

• Double check valve

• Clevis and pin

Allows air of greater pressure through the lines from one item to another

• Automatic slack adjuster

• Foot valve

• Double check valve

• Clevis and pin

Attaches the push plate and rod to the slack adjuster.

• Automatic slack adjuster

• Foot valve

• Double check valve

• Clevis and pin

Match

• Seals the air pressure in brake chamber

• Diaphragm

• Controls the trailer service brakes only

• Trailer control valve (spike, trolley, hand valve)

• Used to manually release the spring brak

• Power spring

Connects to the slack adjuster on 1 end spreads the brake shoes with the other.

• S-Cam

• Tractor, Trailer Supply Valve

• Service Brake Chamber

• Tractor protection valve