TM 5-3805-262-203-31. FUEL SYSTEM TROUBLESHOOTING (CONT)MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTION1. LOW FUEL PRESSURE (Cont).S t e p 2 . ( C o n t ).b. If VTM display does not indicate 20 to 30 psi, go to step 3 be-low.S t e p 3 . R e p l a c e f u e l f i l t e r s ( p a g e 4 - 3 8 ) .Bleed air from fuel system (page 4-40).Tell assistant to crank engine for 30 seconds while you watch VTMd i s p l a y.Display should indicate 20 to 30 psi.a. If VTM display indicates 20 to 30 psi, troubleshooting is com-plete. Problem was in fuel filters. Disconnect test equipmentand reinstall plug in elbow.b. If pressure gage does not indicate 20 to 30 psi, go to step 4below.Step 4. Loosen fitting and disconnect filter hose from fitting.Disconnect opposite end off i l t e r h o s e f r o m f i l t e r h e a d.Check filter hose for obstruc-t i o n.Compressed air used for cleaningp u r p o s e s w i l l n o t e x c e e d 3 0 p s i.U s e o n l y w i t h e f f e c t i v e c h i pg u a r d i n g a n d p e r s o n a l p r o t e c t i v ee q u i p m e n t ( g o g g l e s / s h i e l d ,g l o v e s , e t c ) . F a i l u r e t o d o s oc o u l d c a u s e s e r i o u s i n j u r y t oe y e s a n d p o s s i b l e b l i n d n e s s . Ify o u h u r t y o u r e y e s o r i f a f o r -e i g n o b j e c t i s b l o w n i n t o y o u re y e s , s e e k m e d i c a l a t t e n t i o n i m-m e d i a t e l y.a .b .If filter hose is obstructed, clear obstruction using compresseda i r .If filter hose is not obstructed, disconnect transducer cable W4from pressure transducer. Remove pressure transducer and adapterfrom elbow, reinstall plug, and replace filter head (page 4-41).3-249
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