ARMY TM 9-1290-262-24&P
MARINE CORPS TM 00476C-24&P
AIR FORCE TO 49A7-3-72/74
CAUTION
Compass needle must be in the UN-
LOCKED position before installing
access cover.
22 Position access cover (37) on body as-
sembly (38) and install four screws (39).
NOTE
If old elevating gear is being installed,
proceed with step 23. If new elevat-
ing gear is being installed, go to step
25.
23 Screw elevating gear (40) into elbow tele-
scope (41) and aline holes for headless
straight pin (42).
24 Install pin (42). Drive in pin until outer
surface is flush with elbow telescope sur-
face. Go to step 28.
25 Screw elevating gear (40) tightly into elbow
telescope (41).
26 Using pin hole in elbow telescope as a
guide, drill and ream hole for 3/32 in. di-
ameter pin.
27 Install pin (42). Drive in pin until outer
surface is flush with elbow telescope sur-
face.
28 Install elevation indicator (43) on shoulder
of elbow telescope (41). Face scale grad-
uations to outside and aline scribe marks.
29 Install but do not tighten three setscrews
(44). Setscrews will be tightened during
collimation adjustment. Refer to page
4-30.
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