TM 5-3805-262-20
3-5. FUEL SYSTEM TROUBLESHOOTING (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. LOW FUEL PRESSURE (Cont).
S t e p 1 . ( C o n t ) .
Put two hose clamps on ends of 1/4 inch inside diameter hose.
Connect hose between barb hose connectors installed in filter head
and fuel injection pump feed pump. Do this by pushing end of hose
firmly onto barb hose connector.
Position hose clamps over each end of hose attached to barb hose
connector and tighten.
I n s t a l l z e r o t o 5 0 p s i p r e s s u r e g a g e i n t e e i n s t a l l e d i n f u e l i n j e c-
tion pump feed pump port.
Bleed air from fuel system (page 4-40).
If air cannot be bled from fuel
valves with ignition key switch
NOTE
s y s t e m ( f u e l d o e s n o t
on) go to step 5 below.
Tell assistant to crank engine for 30 seconds
sure gage.
Pressure gage should indicate 20 to 30 psi.
a .
b .
f l o w f r o m b l e ed
while you watch pres-
If pressure gage indicates 20 to 30 psi, there is a blockage in
f u e l f i l t e r s , f i l t e r h e ad , or filter hose, connected between fil-
ter head and fuel injection pump.
Go to step 2 below.
If pressure gage does not indicate 20 to 30 psi, go to step 5
below.
Step 2. Loosen clamps and disconnect hose from barb fittings installed in
filter head and fuel injection pump feed pump.
Disconnect pressure gage from tee.
R e m o v e b a r b h o s e c o n n e c t o r s a n d t e e i n s t a l l e d i n f i l t e r h e a d a nd
fuel injection pump feed pump.
R e i n s t a l l e l b o w s i n f i l t e r h e a d a n d f u e l i n j e c t i o n p u m p f e e d p u m p .
Compressed air used for cleaning purposes will not exceed 30 psi. Use
o n l y w i t h e f f e c t i v e c h i p g 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 e e 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 o c o u l d c a u s e s e r i o u s
i n j u r y t o e y e s a n d p o s s i b l e b l i n d n e s s.
If you hurt your eyes or if a
foreign object is blown into your eyes, seek medical attention immedi-
a t e l y .
3-43
