TM 9-2330-384-14&P
1-13. BRAKE SYSTEM (Con't).
b. MAJOR COMPONENTS AND THEIR FUNCTION.
FUNCTION
NAME
KEY
Provide conveniently operated, leak-free air connections between
EMERGENCY and
1
tractor and semitrailer.
SERVICE Air Couplings
FUNCTION
NAME
KEY
Delivers air pressure to air reservoirs and to semitrailer brakes
2
SERVICE Supply Line
whenever service brake pedal in tractor is applied.
EMERGENCY Supply Line
Delivers constant air pressure to air reservoirs and to rear chamber
3
of each brake chamber.
1-28
