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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
15.
Front brakes OK.
Visual inspection
REASON FOR QUESTION
Air tanks pressurized.
Is air present at spring
Blocked vent hoses will
Supply air hose to foot
brake vent hose on frame?
prevent air from escaping
control valve OK.
at brake service chambers
Foot control valve OK.
and will cause rear brakes
Air hoses at cab floor OK.
not to apply.
Air hose to check valve OK.
NO
Check valve OK.
Air hose to control port of
booster valve OK.
Replace vent hose(s)
Air hose to supply port of
YES
(para 11-21) or relay
booster valve OK.
valve (para 11-14).
Booster 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 rear service brake
air chamber (para 11-8).
2-1876
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