TM 9-2320-260-34-1
5-8. FUEL INJECTOR (TOP STOP) MAINTENANCE (Contd)
c. Assembly
CAUTION
Lubricate parts with clean diesel fuel before assembly. Do not use
lubricating oil. Oil can crystallize under excessive heat, causing
damage to injector.
1.
Place new check ball (2) in injector barrel (3).
2.
Place adapter (1) on injector barrel (3).
3.
Turn adapter(1) and injector barrel (3) upright on clean cloth and place new injector cup (5) on
barrel (3).
4.
Install cup retainer (4) on adapter (1) and finger tighten, then back off 1/4 turn.
CAUTION
Injector barrel and plunger are a matched pair (class fit). Do
not interchange. Do not touch internal parts unless hands are
moistened with diesel fuel or damage to injector can result.
5.
Coat injector plunger (6) with diesel fuel and install in adapter (1).
6.
Insert injector (7) into loading fixture.
7.
Slide body wrench over flats on injector adapter (1).
Position cup retainer wrench on cup retainer (4).
8.
9.
Turn loading fixture stud down until injector (7) is secure.
10.
Tighten stud in loading fixture to 110 lb-in. (12.4
11.
Using cup retainer wrench, tighten cup retainer (4) 50 lb-ft (68
12.
Remove injector (7) and body wrench from loading fixture.
NOTE
Steps 13 through 15 are used to check cup retainer to plunger
alinement.
13.
Remove plunger (6) from injector (7). Apply a light coat of diesel fuel in plunger (6) and insert
plunger (6) into injector (7).
Using palm of hand, press plunger (6) into injector (7) and rotate 90.
14.
NOTE
If plunger does not slide out of injector immediately, injector must
be disassembled and assembled again to improve alinement.
15.
Turn injector (7) over so cup (5) faces up. Plunger (6) should slide out of injector (7) immediately.
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