The air brake system parts include the following:
| • | The low air pressure switch |
| • | The dual air pressure gauge |
| • | Trailer air brake couplings |
| • | The trailer air brake stoplamp switch |
Air is supplied by a piston type air compressor. Refer to Air Compressor
for on-vehicle service information of the air compressor equipment and controls.
Air flow is directed and controlled by air valves. Refer to specific
portions of this section for on-vehicle service information of the air brake
control valves.
The air foundation brakes are cam type. They are applied by the following:
The parking brakes at the rear wheels are actuated by the spring brake
chambers, which are controlled by the system park valve located in the cab.
Refer to Air Compressor for on-vehicle service information of brake components
located at the wheels.
