TM-9-1290-262-24-P
AIMING CIRCLE, M2A2, W/E
TECHNICAL MANUAL; UNIT, DIRECT SUPPORT,AND GENERAL SUPPORT MAINTENANCE MANUAL
SEPTEMBER 1994
TM-9-1290-262-24-P - Page 65 of 192
ARMY TM 9-1290-262-24&P
MARINE CORPS TM 00476C-24&P
AIR FORCE TO 49A7-3-7174
ADJUSTMENT OF TARGET
Adjust position of the test target (fig. E-6, appx
E) until its vertical (1) and horizontal (2)
crosslines coincide with reticle lines on the aim-
ing circle.
BACKLASH IN ELEVATION WORM
1
2
3
4
5
NOTE
During setup, the aiming circle line
of sight should be directed toward
the test target.
While sighting through elbow telescope
eyepiece (1), rotate elevation knob (2) to
superimpose aiming circle horizontal reticle
line on test target horizontal line.
Record reading of elevation micrometer
scale (3).
Rotate elevation knob (2) two full turns
clockwise.
Rotate elevation knob (2) counterclockwise
to record reading without overtravel.
Sight through elbow telescope. Error be-
tween aiming circle horizontal reticle and
test target horizontal line should not ex-
ceed 0.6 roil. If tolerance is
proceed to steps 6 thru 17.
met, proceed to torque test,
exceeded,
If tolerance is
page 3-39.
3-37
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