TM 9-2320-365-20-2
2-1628
YES
NO
5.
Visual inspection
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
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.
Is air present at the check
valve delivery air hose
when applying brakes?
A lack of air from the air
delivery port of the check
valve will not allow the
rear brakes to be applied.
Replace check
valve (para 11-14).
Faulty check valve.
Faulty air hose to load
sensing valve.
Faulty load sensing valve.
Faulty air hose to control
port of relay valve.
Faulty air hose to supply
port of relay valve.
Faulty relay valve.
Faulty air hoses to spring
brakes.
Faulty vent hose from
spring brake service
chamber.
Faulty spring brake
chamber.
i2. REAR BRAKES DO NOT APPLY (CONT)