(a) The mounting surfaces of the mount shall be positioned and
secured on a mounting plate that is level within 1.0 mil. The axis through
the telescope socket shall be parallel to the flat mounting surfaces within
3 minutes (0°3').
(b) Secure the auxiliary telescope, held by bushing (Figure I),
in the mount socket with telescope locking clamp. The reticle cross line
pattern and target shall be aligned.
(c) The elevation locking lever shall be in the locked position
and torque of 15 ± 1 pound-inches to the deflection locking screw shall be
4.6.5 Locks. - The mount shall be positioned as specified in 4.6.4
with the auxiliary telescope aligned on the target. A torque of 4 pound-
inches applied to the deflection eccentric plug shall not change the line
of sight of the auxiliary telescope. A torque of 5 pound-inches applied
to the elevation adjustment worm shall not change the line of sight of
the auxiliary telescope.
4.6.6 Deflection.- The mount shall be in position as established in
4.6.4. Loosen the deflection locking screw. Rotate the deflection (azimuth)
eccentric plug to move the auxiliary telescope to the right and then to the
left. During this rotation view through the auxiliary telescope and ascer-
train if the movement, as measured by the target markings, meets the minimum
requirements specified in 188.8.131.52. Return line of sight on target and lock
deflection locking screw as specified in 4.6.4.
4.6.7 Elevation. - The mount shall be positioned as established in
4.6.4. Rotate the elevation locking lever clockwise to release the eleva-
tion mechanism. Rotate the elevation adjustment screw to move the auxiliary
telescope up and then down. During this rotation, view through the
auxiliary telescope and ascertain if the movement, as measured by the
target markings, meets the minimum requirements specified in 184.108.40.206.
4.6.8 Torque. - With the mount stabilized at standard ambient
temperature and the torque adapter attached to the deflection adjustment
screw, the amount of torque required to rotate the screw must be within
the specified tolerance and shall be recorded. This test is repeated at
both extreme temperatures and the results obtained must not exceed the
recorded values by more than the specified requirement. The entire test
is repeated with the torque adapter attached to the elevation adjustment
screw. While the mount is subjected to the extreme temperatures the
toggle switch is actuated and must function.
4.6.9 Instrument light. - With a potential of 24 volts applied to
the electrical contact of the mount the instrument light bulb shall be
illuminated when the rheostat is actuated.