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Page Title:
REAR BRAKES DO NOT APPLY (cont) |
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 TM 9-2320-366-20-2
TM
i2. REAR BRAKES DO NOT APPLY (CONT)
i2.
KNOWN INFO
TEST OPTIONS
12.
Front brakes OK.
Visual inspection
REASON FOR QUESTION
Air tanks pressurized.
Is air present at supply
A blocked or leaking
Supply air hose to foot
port of relay valve?
supply air hose from
control valve OK.
primary tank to supply port
Foot control valve OK.
of relay valve will prevent
Air hoses at cab floor OK.
air delivery to service
Air hose to check valve OK.
NO
brake chambers and
Check valve OK.
cause rear brakes not to
Air hose to control port of
apply.
booster valve OK.
Air hose to supply port of
YES
booster valve OK.
Replace damaged air hose
Booster valve OK.
(para 11-21).
Air hose to load sensing
valve OK.
Load sensing valve OK.
Air hose to control port of
relay valve OK.
POSSIBLE PROBLEMS
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.
2-1870
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