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FUEL INJECTOR SYNCHRONIZATION MAINTENANCE - continued - TM-9-2320-386-24-1-20234
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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 SYNCHRONIZATION MAINTENANCE - continued - TM-9-2320-386-24-1-20236
TM 9-2320-386-24-1-2
0321 00
FUEL INJECTOR SYNCHRONIZATION MAINTENANCE (Contd)
NOTE
When fuel shutoff solenoid is removed, rack bars move into "fuel-
on" position. This is necessary to set and check the
synchronization.
13.
Remove fuel shutoff solenoid (WP 0050 00).
NOTE
The limit screw on control linkage positioning tool is used to
establish a synchronizing reference at No. 1 injector. Once
reference is established, proceed to check and adjust all other
injectors to match No. 1 injector.
Ensure limit screw remains seated against cylinder head while
adjusting horizontal dial indicator.
14.
Loosen limit screw on control linkage positioning tool until horizontal dial indicator reads 4.0 mm.
15.
Tighten Allen-head setscrew on control linkage positioning tool.
16.
Move control linkage positioning tool toward push rod side of engine and hold. Ensure horizontal
dial indicator reads double zero.
a. If horizontal dial indicator reads double zero, go to step 18.
b. If horizontal dial indicator does not read double zero, go to step 17.
NOTE
Assistant will help with step 17.
17.
While holding control linkage positioning tool toward push rod side of engine, set double zero on
horizontal dial indicator.
a. Loosen red thumb screw on side of holding fixture and slide horizontal dial indicator laterally
until small needle lines up on zero. Tighten red thumb screw.
b. Loosen bezel screw on horizontal dial indicator and turn bezel until large needle lines up on
zero. Tighten bezel screw.
18.
Move control linkage positioning tool toward injector side of engine. Ensure horizontal dial
indicator reads 4.0 mm and limit screw is seated against cylinder head.
a. If horizontal dial indicator reads 4.0 mm, go to step 22.
b. If horizontal dial indicator does not read 4.0 mm, go to step 19.
19.
Loosen Allen-head setscrew on control linkage positioning tool.
20.
Loosen limit screw on control linkage positioning tool until horizontal dial indicator reads 4.0 mm.
Ensure limit screw is seated against cylinder head while adjusting horizontal dial indicator.
21.
Tighten Allen-head setscrew on control linkage positioning tool.
CAUTION
After the syncronization reference of double zero and 4.0 mm is
established, do not adjust limit screw until syncronization is
completed.
22.
Pull and release control linkage positioning tool several times to ensure horizontal dial indicator
reads double zero on push rod side and 4.0 mm on injector side.
a. To reset double zero, repeat steps 17 through 22.
b. To reset 4.0 mm 0.02 mm, repeat steps 18 through 22.
23.
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.
CAUTION
Bottom contact point on pivot arm of holding fixture arm must
clear end of rack bar when inserted into engine. Failure to do so
will cause damage to equipment and result in an inaccurate
reading.
0321 00-6

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