C1, TM 9-1240-318-35
d. Installation.
wrench so that only the inner cell assembly (5, fig. 6) can
(1) Place window in light well and secure in
be rotated.
place by placing a small amount of sealing compound,
(5) Rotate the inner cell assembly (clockwise or
MIL-S-11031, around the outer edges of window.
counterclockwise) a small amount. Place the eyepiece
(2) Install items 6 through 4. Secure chain (3)
assembly back on the telescope and again check the
with screws (2 and 1).
angular value of the telescope reticle as specified in (3)
above.
5-13. Repair of Identification Plate 10543495 (M120)
(6) If still not within the specified tolerance then
or 11728182 (XM134)
repeat (4) and (5) above until the conditions outlined in
(3) above are attained.
Note. Item numbers shown below refer to figure
(7) After reticle accuracy test and adjustment
have been completed, check and adjust for reticle plumb
as described in paragraph 5-10d.
a. Removal.
Remove screws (1 and 8) and
remove identification plate (9).
h. Test and Adjustment of Reticle Illumination.
b. Inspection. Inspect identification plate. Letters
With an instrument light, M52E1 equivalent, properly
and numbers should be clear, complete, and legible.
mounted, the etched graduations of the telescope reticle
Plate should be free of paint splotches and show no
will appear clearly defined when observed in a dark
signs of corrosion.
room.
c. Installation. Install plate and secure with two
screws (1 and 8). Lock screws with varnish, MIL-V-173.
5-12. Replacement of Plug 4730-893-5885, Adapter
1240-891-4541, Window 1240-087-7284, and
5-14. Repair of Dovetail 10543489
Chain 4010-016-8704
Note. Item numbers shown below refer to figure
Note. Item numbers shown below refer to figure
a. Removal.
a. Removal.
(1) Remove purging screws (1).
(1) Remove screws (1 and 2) and remove chain
(2) Remove items 2 through 4 from housing (6).
(3).
Remove pin (5) if damaged.
(2) Remove items 4 through 7.
b. Inspection. Inspect the mounting surface of the
Note. Use care in removing window (7) from
dovetail for burrs, paint, or other deformities that will
telescope light well since it is sealed with sealing
prevent proper seating of dovetail into telescope mount.
compound, MIL-S-11031.
c. Repair. Remove burrs from dovetail with a fine
b. Inspection.
file.
(1) Check plug and adapter for damaged
threads.
d. Installation. Install items 5 through 1 on housing
(2) Check window for chips, digs, or scratches.
(6).
window that will interfere with performance by using a
fine abrasive stone.
5-5
