TM 9-2320-365-20-2
2-1640
YES
NO
Is air present at service
brake air chamber(s) of
spring brakes?
Visual inspection
KNOWN INFO
TEST OPTIONS
REASON FOR QUESTION
A lack of air at service
brake air chambers will
cause rear brakes not to
apply.
11.
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.
POSSIBLE PROBLEMS
Faulty air hoses to spring
brakes.
Faulty vent hose from
spring brake service
chamber.
Faulty spring brake
chamber.
Replace damaged air hose(s)
(para 11-19).
i2. REAR BRAKES DO NOT APPLY (CONT)