TM 5-3805-262-20
3-4. ENGINE TROUBLESHOOTING (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2. ENGINE HARD TO START OR WILL NOT START (NO EXHAUST SMOKE) (Cont).
S t e p 2 . ( C o n t ).
b. If pressure gage does not indicate 20 to 30 psi, disconnect zero
to 50 psi pressure gage from elbow port.
Reinstall plug in elbow port.
Go to page 3-41, fuel system troubleshooting, MALFUNCTION 1.
Step 3.
Check if there is wrong or contaminated fuel in fuel tank (contami-
nated fuel will have a milky white appearance).
a. If wrong or contaminated fuel in fuel tank, drain and clean fuel
t a n k ( p a g e 4 - 3 2 ) , 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 ) , a n d r e f i ll
w i t h c o r r e c t f u e l.
b. If fuel is okay, go to step 4 below.
step 4.
Check for air in fuel system.
a .
b .
Open bleed valve on first stage
f i l t e r .
T e l l a s s i s t a n t t o t u r n i g n i t i o n
key switch to on position.
Close bleed valve when clear
bubble free fuel appears. Tell
a s s i s t a n t t o t u r n i g n i t i o n k ey
switch to off position.
Open bleed valve on second stage
f i l t e r .
T e l l a s s i s t a n t t o t u r n i g n i t i on
key switch to on position.
Close bleed valve when clear
bubble free fuel appears. Tell
a s s i s t a n t t o t u r n i g n i t i o n k ey
switch to off position.
Use clean cloth and wipe up any
D i e s e l f u e l s p i l l a g e.
If no air in fuel system, go to step 5 below.
3-9
