TM 9-2320-365-20-2
2-1642
NO
YES
Visual inspection
KNOWN INFO
TEST OPTIONS
REASON FOR QUESTION
Is air present at spring
brake vent hose on frame?
Blocked vent hoses will
prevent air from escaping
at brake service chambers
and will cause rear brakes
not to apply.
12.
Front brakes OK.
Air tanks pressurized.
Supply air hose to foot
control valve OK.
Foot control valve OK.
Air hoses at cab floor OK.
Air hose to check valve OK.
Check valve OK.
Air hose to load sensing
valve OK.
Load sensing valve OK.
Air hose to control port of
relay valve OK.
Air hose to supply port
relay valve OK.
Relay valve OK.
Air hoses to spring
brakes OK.
POSSIBLE PROBLEMS
Faulty vent hose from
spring brake service
chamber.
Faulty spring brake
chamber.
Replace vent hose(s)
(para 11-19) or relay
valve (para 11-13).
Replace rear service brake
air chamber (para 11-8).
i2. REAR BRAKES DO NOT APPLY (CONT)
