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FUEL INJECTOR REPLACEMENT - continued - TM-9-2320-386-24-1-20220
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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 REPLACEMENT - continued - TM-9-2320-386-24-1-20222
TM 9-2320-386-24-1-2
0319 00
FUEL INJECTOR REPLACEMENT (Contd)
INSTALLATION
NOTE
If two or more fuel injectors were removed, repeat steps 1 through
5 until all injectors are installed.
1.
Apply lubricating oil to fuel injector (2) and new O-rings (3) and (4).
2.
Install new O-rings (3) and (4) on fuel injector (2).
CAUTION
Do not move fuel injector rack without slightly compressing
injector spring. Failure to do so may result in damage to fuel
injector.
Do not use holddown screw to pull injector down into cylinder
head. Failure to comply may result in damage to equipment.
3.
Install fuel injector (2) in cylinder head (5). Rotate fuel injector (2) counterclockwise to engage
injector rack (8) with control linkage (6).
4.
Push down on top of fuel injector (2) until seated into bore of cylinder head (5).
NOTE
Ensure injector is seated before installing injector holddown
screw.
5.
Install injector holddown screw (1) on fuel injector holddown bracket (7) and cylinder head (5).
Tighten screw (1) 6-12 lb-ft (8-16 Nm).
NOTE
Anchor is only installed on No. 1 cylinder rocker arm assembly.
Install fuel injection control linkage if removed (WP 0320 00).
6.
Install fuel injector pushrod (9), two valve pushrods (10), rocker arm assembly (13), and anchor (12)
on cylinder head (5) with four screws (11). Tighten screws (11) 18-22 lb-ft (24-30 Nm).
7.
Turn three adjusting screws (15) clockwise on rocker arm assembly (13) until snug.
8.
Tighten three jamnuts (14) on rocker arm assembly (13) 13-23 lb-ft (20-30 Nm).
NOTE
If two or more rocker arm assemblies were removed, repeat
steps 6 through 8 until all rocker arm assemblies are installed.
9.
Perform intake and exhaust valve clearance check and adjustment (WP 0311 00).
10.
Perform fuel injector synchronization (WP 0321 00).
0319 00-4

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