TM 9-2320-272-24-4
5-6. FUEL INJECTOR SLEEVE MAINTENANCE (Contd)
1.
Insert cylinder head (5) cutter (3) and cutter pilot (2) into injector sleeve bore (6).
2.
Position holder (1) to cutter (3).
3.
Set cylinder head (5) on table of drill press.
CAUTION
Tool chatter may occur if drill speed is higher than 75 rpm,
causing damage to cylinder head.
Do not cut more than 0.010 in. (0.254 mm) deep into cylinder
head.
Cutter must be sharp to prevent bead damage.
NOTE
Press may be turned by hand for light cuts or to prevent
accidental removal of too much material.
4.
Set drill press speed no higher than 75 rpm.
5.
Lift holder (1), pilot (2), and cutter (3) and apply cutting oil to lubricate cutter (3).
6.
Turn drill press motor on and take a very light cut. When the proper cut depth has been reached,
allow cutter (3) to dwell ten seconds to ensure a good seat and to clean the groove.
7.
Remove holder (1), pilot (2), and cutter (3) from injector sleeve bore (6).
8.
Apply Prussian blue to coat seat end of new injector sleeve (7) and insert new injector sleeve (7) in
injector sleeve bore (6) until fully seated.
9.
Remove new injector sleeve (7) from injector sleeve bore (6). Ensure blueing shows a complete 360
band on both the injector sleeve (7) and seat (4).
Ensure sleeve seat at bottom of injector bore is free from oil,
carbon, or other foreign materials.
1.
Apply lubricating oil to coat new O-ring (10).
2.
Install new O-ring (10) into groove (11) of injector sleeve bore (6).
NOTE
Ensure mandrel is not struck with a hammer during this
operation.
3.
Use injector sleeve mandrel to push the new injector sleeve (7) into injector sleeve bore (6) until it
bottoms.
4.
Remove mandrel from injector sleeve bore (6).
5.
Install injector sleeve holding tool (8) in cylinder head (5). Tighten nut (9) 35-40 lb-ft
(48-54 Nm)
6.
Insert injector sleeve mandrel into injector sleeve bore (6) and drive injector sleeve (7) in with soft-
faced hammer until seated.
7.
Retighten nut (9) 35-40 lb-ft (48-54 Nm).
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