TM 5-4320-302-14
6-4. ADJUSTMENT OF FUEL INJECTION TIMING (CONT)
Location/Item
Action
Remarks
16.
High pres-
Pump hand pump handle until fuel flows out of
sure timing
overflow pipe into reservoir.
device No.
003-0714
17.
Flywheel or
Rotate flywheel, crankshaft, or V-belt pulley
V-belt pulley
counterclockwise (in normal running direction)
slowly and continue to pump hand pump handle
until fuel flow decreases to a drip. When the
interval between droplets is 5 to 8 seconds, the
fuel injection rate is correct. Stop rotation of
crankshaft.
18.
FB mark
Make sure FB mark lines up with marking on
front cover. If so, the fuel injection timing is
adjusted correctly and
there is no need for
further adjustment.
If not, proceed
with the following
steps to adjust fuel
injection timing.
19.
Fuel injec-
Remove and adjust fuel injection pump seating
tion pump
surface to base circle of cam clearance in accord-
ance with procedure in paragraph 6-5. Reinstall
but do not tighten hex nuts.
20.
Fuel injec-
Adjust by moving fuel injection pump sideways.
tion timing
Move pump toward A if FB mark has not reached
marking on front cover after proceeding with
step 17. If FB mark has not reached marking on
front cover, fuel injection will occur earlier than
it should. Moving pump toward A will make fuel
injection occur later. Move pump toward B if the
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