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
crosslines coincide with reticle lines on the aim-
ing circle.
BACKLASH IN ELEVATION WORM
NOTE
During setup, the aiming circle line
of sight should be directed toward
the test target.
While sighting through elbow telescope
1
eyepiece (1), rotate elevation knob (2) to
superimpose aiming circle horizontal reticle
line on test target horizontal line.
Record reading of elevation micrometer
2
scale (3).
Rotate elevation knob (2) two full turns
3
clockwise.
Rotate elevation knob (2) counterclockwise
4
to record reading without overtravel.
Sight through elbow telescope. Error be-
5
tween aiming circle horizontal reticle and
test target horizontal line should not ex-
ceed 0.6 roil. If tolerance is exceeded,
proceed to steps 6 thru 17. If tolerance is
met, proceed to torque test, page 3-39.
