T M 9 - 4 9 3 1 - 3 8 1 - 1 4 & P - 2
FRAME II
Remove Eyepiece, Adapter, and Graticule:
1.
2.
3.
4.
50
CAUTION
Eyepiece assembly (1) is breakable. To avoid breaking
eyepiece (1), handle it carefully.
Unscrew and takeoff eyepiece (1). Look at eyepiece (1) for scratches or cracks. If
bad, turn in. lf OK, set aside for later use.
Take out four socket head cap screws (2) and Iockwashers (3) from adapter (4) with
key. Get rid of lockwashers (3).
Takeoff adapter (4) from lDU assembly (5). Look at adapter (4) for cracks. If bad,
turn in adapter (4). If OK, set aside for later use.
Look at IDU graticule (6) for scratches and cracks; if bad, GO TO STEP 5. If OK,
GO TO FOLLOW-ON MAINTENANCE.
Loosen adhesive and take IOU graticule (6) off electron tube assembly (7) with knife.
Turn in IDU graticule (6).
.
Follow-on Maintenance:
NOTE: To instalI eyepiece assembly, adapter, and IDU graticule, refer to task 13.
TASK 7 ENDS HERE
Volume IV
2-178
Para. 2-8, Task 7