ARMY TM 9-1290-262-24&P
MARINE CORPS TM 00476C-24&P
AIR FORCE TO 49A7-3-72/74
4-4. TEST AND ADJUSTMENT PROCEDURES (cont).
RETICLE TILT (cont)
10
Tighten two vertical setscrews (7).
11
Install two horizontal setscrews (6).
12
Remove eyepiece assembly (4).
13
Tighten retaining ring (5) and spot seal in
two places with sealing compound (item 8,
14
Install and focus eyepiece. Refer to page
4-24.
15
Recheck aiming circle reticle for plumb
within 0.6 mil.
16
If reticle is still tilted, repeat steps 4 thru.
15. Then repeat steps 1 thru 3.
17
Fill four setscrew holes (9) with sealing
compound (item 8, appx D).
RETICLE ILLUMINATION
1
install M51 instrument light lamp bracket
(1) in the elbow telescope slotted bracket
(2).
NOTE
If M51 instrument light is not avail-
able, any other suitable source of light
may be directed at red window.
2
Cover objective end of elbow telescope (3)
and turn on instrument light.
All reticle (4) markings must appear clearly
3
defined and be easily read when viewed
through aiming circle eyepiece (5). If reti-
cle is clearly illuminated, proceed to colli-
mation test. Refer to page 4-30. if reticle
is not clearly illuminated, proceed to step
4.
