TM 5-3805-262-20
3-19. AIR BRAKE SYSTEM TROUBLESHOOTING (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
3. LOW AIR PRESSURE (AIR PRESS GAGE INDICATES IN RED ZONE AND LOW AIR PRESSURE
BUZZER SOUNDS) (Cont).
Step 10. (Cont).
a . I f a i r p r e s s u r e i s n o r m a l
go to step 11 below.
b . I f a i r p r e s s u r e i s s t i ll
low, open air reservoir
drain valve to drain air.
Loosen and remove 9/16-18
p i p e p l u g i n s t a l l e d in
hose. Reconnect and
t i g h t e n h o s e f i t t i n g t o
elbow installed in pres-
s u r e p r o t e c t i o n v a l v e.
C l o s e a i r r e s e r v o i r d r a in
valve. Go to step 12
below.
Step 11. Connect an air pressure regulator to shop compressed air system.
Connect air hose between
a i r p r e s s u r e r e g u l a t or
outlet and elbow installed
3-125
