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FUEL INJECTOR TIMING MAINTENANCE - continued - TM-9-2320-386-24-1-20244
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/.5ton/TM-9-2320-386-24-1-2 Extended Service Program (ESP) for 2-1/2-Ton 6x6 M44A3 Series Trucks (Diesel) Manual
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FUEL INJECTOR TIMING MAINTENANCE - continued - TM-9-2320-386-24-1-20246
TM 9-2320-386-24-1-2
0322 00
FUEL INJECTOR TIMING MAINTENANCE (Contd)
NOTE
Do not pull on or touch vertical dial indicator when removing
holding fixture. If dial indicator is moved, the double zero on the
vertical dial indicator must be reset.
18.
Remove holding fixture with dial indicators from injector by pressing top ball on pivot arm of
holding fixture fully and pulling holding fixture straight up.
19.
Repeat steps 9 through 18 for two remaining injectors.
20.
Remove timing bolt from timing hole (2) on flexplate housing (1).
NOTE
When turning crankshaft, use the four large screws on front of
crankshaft. Do not use the eight small screws on front of
crankshaft pulley.
21.
Rotate crankshaft clockwise 360 degrees until timing bolt engages non-threaded hole in flywheel.
NOTE
No. 1 piston is on compression stroke if intake and exhaust valves
are closed and rocker arms can be moved by hand.
No. 1 piston is on exhaust stroke if intake and exhaust valves are
open and rocker arms cannot be moved by hand.
22.
Position No. 1 piston at TC and make identification for the correct stroke (compression or exhaust).
Refer to table 2 for correct injector sequence.
Table 2. Crankshaft Positions for Fuel Timing.
Check/adjust with No. 1
Injectors 3-5-6
piston on TC compression stroke
Check/adjust with No. 1
Injectors 1-2-4
piston on TC exhaust stroke
NOTE
Set timing for No. 1 injector last. This will be correct position to
check and adjust fuel setting later.
23.
Repeat steps 9 through 18 until all the injectors are checked, according to the correct stroke
(compression or exhaust). Refer to table 2 for correct injector sequence.
24.
Remove timing bolt from timing hole (2) on flexplate housing (1).
25.
Install new O-ring (3) and plug (4) in timing hole (2) on flexplate housing (1).
26.
Adjust fuel setting (WP 0323 00).
0322 00-6

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