TM 9-2320-211-10-1
(2) The service brake system is an air-hydraulic system made up of the
foot brake pedal, pedal linkage, master cylinder, air-hydraulic cylinder, hydraulic
lines to all wheels, wheel cylinders, brake drums, and shoes. The master cylinder
contains hydraulic fluid. Pressure on the brake pedal is sent to the air-hydraulic
cylinder. The air-hydraulic cylinder increases pressure to the wheel cylinders.
The wheel cylinders expand and press the brakeshoes against the drum to slow or
stop the truck. The system components are shown in fig. 2-16.
TA
081060
Foot brake pedal
1.
2.
Master cylinder
3.
Wheel cylinders
4.
Hydraulic lines
5.
Air-hydraulic brake cylinder