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TM 9-2320-360-34-1
3-27. ENGINE TUNE-UP SERVICE/ADJUST/CALIBRATE (CONT)
NOTE
Fuel injector timing adjustment for all
cylinders can be completed during
one revolution of the crankshaft if
para 3-27c is performed in cylinder
sequence shown.
c.
Fuel Injector Timing Adjustment
NOTE
Exhaust valves are fully opened
when push rod sides of rocker arms
are at their highest point.
(1)
Rotate crankshaft by turning camshaft
pulley (1) clockwise until exhaust valves
(2) are fully opened.
(2)
Insert 1.520 injector gage (3) in hole at top
of fuel injector body (4).
(3)
Loosen locknut (5) on injector rocker arm
push rod (6).
(4)
Turn push rod (6) and adjust injector
rocker arm (7) so flat side of injector gage
(3) passes just over top of injector follower
(2).
(5)
Hold push rod (6) and tighten locknut (5).
(6)
Insert injector gage (3) in fuel injector
body (4) and check clearance of injector
follower (2). Repeat steps (2) thru (5) if
further adjustment is necessary.
(7)
Repeat steps (1) thru (6) to adjust timing
of remaining seven fuel injectors (8).
d.
Follow-On Maintenance
(1)
Install rocker covers (TM 9-2320-360-20).
(2)
Start engine and operate for 10 minutes
(TM 9-2320-360-20).
(3)
Turn on engine brake retarder switch
(TM 9-2320-360-20).
(4)
Open throttle to full engine speed and
release.
(5)
Check brake operation while engine is
returning to idle.
(6)
Repeat full throttle and release procedure
six to eight times to bleed air from engine
brake system.
(7)
Turn engine off (TM 9-2320-360-10).
3-138
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