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|  MIL-M-70453A (AR)
4.7.8.1 Telescope Clamping mechanism. unlocked Position.
When subjected to a tactile examination, the function of the
locking lever shall meet the requirements of 3.8.1.1. When the
mandrel is inserted into the telescope holder, it shall rotate
freely for 360 degrees and the telescope holder move fore and aft
freely.
4.7.8.2 Telescope clamping mech anism. lock ed position
Insert the mandrel into the telescope holder. Apply a force of
15 to 17 inch-pounds to the locking lever and 10 to 12 inch-
pounds to the wing nut. Apply the specified torques to the
mandrel and telescope holder, in turn. The Telescope clamping
mechanism shall meet the reqirements of 3.8.1.2.
Install and remove the mount
4.7.8.3 Mount locking latch
from the dovetail on the stand a minimum of three (3) times (3
The mount shall meet the requirements of 3.8.2,
installations).
at the temperature specified.
4.7.8.4 Locking kn obs . Rotate the azimuth and elevation
locking knobs to a locked position with the appropriate torque
wrench and adapter. The azimuth and elevation mechanisms shall
meet the requirements of 3.8.3 when the specified torque is
applied to the applicable knob, at the temperature indicated.
4.7.8.5 Azimuth slip scales. When subjected to a tactile
examination for operability, the micrometer knob slip scales
(azimuth and elevation) and azimuth scale shall meet the
requirements of 3.8.4, at the temperature indicated.
This test shall be
4.7.8.6 Torque, coarse azimuth
performed on complete M64A1 sight Mount Assembly (P/N 9360169)
units. The sight assembly shall be mounted via the dovetail such
that it is possible to level the bubble vials using the azimuth
and elevation knobs and with sufficient security to assure that
the level will not change during the test. The torque shall be
applied in a uniformly increasing reamer at a rate not to exceed
1.0 inch-pound per second and the actual torque value at which
the scale initially slips shall be recorded. The test equipment
shall not exert a force on the coarse azimuth scale in a downward
direction greater than 1.1 pounds while the torque is being
measured. Prior to performing the test, the azimuth control knob
shall be used to rotate the coarse azimuth scale at least 400
mils in the clockwise direction stopping with the O mil mark on
the scale aligned with the index arrow. The counterclockwise
torque value should now be obtained. The azimuth control knob
should then be used to rotate the coarse azimuth scale 400 mils
in the counterclockwise direction and the clockwise torque value
should be obtained. The coarse azimuth scale shall then be
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