TM-9-2320-283-20-1
TRUCK TRACTOR, LINE HAUL, 50,000 GVWR, 6X4, M915A1
TECHNICAL MANUAL; ORGANIZATIONAL MAINTENANCE PART 1 OF 3
DECEMBER 1983
TM-9-2320-283-20-1 - Page 95 of 926
TM 9-2320-283-20-1
PRINCIPLES OF OPERATION.
1-20.
BRAKE SYSTEM (Continued).
b.
Brake System Components (Continued).
(9)
Trailer Supply Valve.
In applied position, supplies air pressure to trailer service and emergency air lines.
(10)
Front Axle Ratio Valve.
Directs air pressure from a single incoming line to brakes on both ends of the front axle.
Limits brake application
pressure to actuators during normal service braking.
TA 236793
1-74
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