TM 5-3805-262-203-19. AIR BRAKE SYSTEM TROUBLESHOOTING (CONT)MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTION3. LOW AIR PRESSURE (AIR PRESSURE GAGE INDICATES IN RED ZONE AND LOW AIR PRES-SURE BUZZER SOUNDS) (Cont).Step 6.Disconnect hose connected to check valve.Remove check valve from elbow.Connect an air hose connected to a regulated air supply capablesupplying up to 160 psi air pressure to check valve female end.ofApply air pressure to check valve; check valve shall not v e n t a i r.a. If check valve vents air, replace it (page 7-58).b. If check valve does not vent air, reinstall it and connect hoseto check valve. Go to step 7 below.Step 7.Close air reservoir drain valve.T e l l a s s i s t a n t t o s t a r t e n g i n e.W i t h e n g i n e o p e r a t i n g , i n s p e c t a i r r e s e r v o i r , f i t t i n g s , a n d h o s esfor air leakage (page 7-56).a. If a hose is leaking, replace (page 7-58).b . I f a f i t t i n g i s l e a k i n g , t i g h t e n i t ; i f i t s t i l l l e a k s a f t e rt i g h t e n i n g , r e p l a c e i t ( p a g e 7 - 5 8 ).c . I f a i r r e s e r v o i r i s d a m a g e d , r e p l a c e i t ( p a g e 7 - 5 8 ).d. If fittings and hoses are okay, go to step 8 below.Step 8.With engine operating, inspect air compressor lines for air leakage(page 7-102).a. If air compressor lines are leaking tighten; if tightening doesno good, replace leaking lines (page 7-106).b. If air compressor lines are okay, go to step 9 below.3-123
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business