TM 9-2320-365-20-2
2-1632
YES
NO
Visual inspection
KNOWN INFO
TEST OPTIONS
REASON FOR QUESTION
A lack of air at load
sensing valve will
prevent air delivery to
service brake chambers
and cause rear brakes
not to apply.
Is air present at load
sensing valve
outlet hose?
7.
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.
POSSIBLE PROBLEMS
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.
Replace load sensing
valve (para 11-10).
i2. REAR BRAKES DO NOT APPLY (CONT)