ARMY TM 9-2815-257-24
AIR FORCE TO 38G1-128-2
MARINE CORPS TM 10155A/2815-24/3
4-11. FUEL INJECTION PUMP MAINTENANCE - cont.
Adjust fuel injection timing in accordance with
step E before connecting fuel pipe (1) to injection
E. FUEL INJECTION TIMING ADJUSTMENT.
Remove flywheel housing (Para. 3-13). Dis-
connect fuel pipe (1, Figure 4-12) from injection
Set governor speed control handle to RUN
Rotate flywheel one revolution in the clockwise
direction until T position mark on flywheel
matches V mark off line on cylinder body fin (see
Figure 4-13). This is the top dead center (TDC)
position. There should be some fuel coming out
of the fuel injection pump. If fuel is not present,
rotate the flywheel another revolution clockwise.
Turn flywheel counter-clockwise about 30
degrees from T position mark.
Slowly turn flywheel clockwise until fuel flows
from injection pump, then stop rotation.
Use timing marks on flywheel to determine
flywheel position. Marks are 5 degrees apart.
Flywheel should be 16 to 18 degrees before TDC
position. Therefore, the V mark off line should
be aligned between the third and fourth flywheel
timing marks before the TDC position mark.
Repeat steps 4 through 6 two or three times to
make sure reading is accurate. Fuel injection
should begin when flywheel is rotated 16 to 18
degrees from TDC position mark.
Figure 4-13. Fuel Injection Timing