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 91 of 926
TM 9-2320-283-20-1
PRINCIPLES OF OPERATION.
1-20.
BRAKE SYSTEM (Continued).
b.
Brake System Components (Continued).
(3) Front-Axle Air Brake Chamber.
Receives compressed air from ratio valve to mechanically rotate slack adjuster.
(4)
Forward-Rear Axle Brake Chamber.
Receives compressed air from double check and quick release valve to mechanically rotate slack adjuster.
Spring
loaded chamber rotates slack adjuster (and applies brakes) when air pressure drops due to one of the following:
(a) Compressed air system failure.
(b) Application of park brakes.
(c) Air system draining.
TA 236790
1-71
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