TM 5-3805-262-34
2-5. FUEL SYSTEM TROUBLESHOOTING
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. FUEL INJECTION PUMP NOT OPERATING PROPERLY.
Step 1.
Remove fuel injection pump from engine (page 3-136).
Dry cleaning solvent P-D-680 used to clean parts is toxic and flammable.
Wear protective goggles and gloves and use only in a well ventilated
area. Avoid contact with skin, eyes and clothes and don’t breathe
vapors . Do not use near open flame or excessive heat and don-t smoke
when using it. Failure to do so could cause serious injury. If you be-
come dizzy while using cleaning solvent, get fresh air and medical
attention immediately. If contact with skin or clothes is made, flush
with large amounts of water.
If contact with eyes is made, wash eyes
with water and get medical aid immediately.
Using clean cloth moistened
with cleaning solvent, thor-
oughly clean exterior of
fuel injection pump. Dry us-
ing clean cloths.
Remove two capscrews and
copper gaskets, then remove
cover plate and gasket.
Allow oil to drain from fuel
injection pump.
Rotate camshaft in counter-
clockwise direction as
viewed from drive end while
checking that roller tap-
pets, springs, and plungers
operate in firing order se-
quence 1-5-3-6-2-4.
a.
b.
If roller tappets,
springs, and plungers
operate in firing order
sequence, go to step 2
below.
If roller tappets, springs, and plungers do not operate in fir-
ing order sequence, problem could be damaged camshaft or cam-
shaft is installed incorrectly. Disassemble fuel injection pump
(page 3-140) and check cause.
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