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|  MIL-T-45379D(AT)
b. The cupola machine gun centerline shall be alined on target laying from low to high.
c. The periscope reticle shall be alined on target with cupola boresight knobs. Knob
position shall be recorded.
d. The 8-mile road test shall be performed.
e. The vehicle shall be returned to position established in a.
f. The cupola machine gun centerline shall be alined on original aiming point laying
from low to high.
g. The cupola boresight knobs (excluding boresight knob backlash) shall be used if
necessary to reposition the commander's periscope reticle on its original aiming point.
Any loss of boresight retention shall be noted by the new boresight knob position and
shall not exceed the limits specified.
4.6.4.9.8.5 Interlock assembly location. To determine conformance to 3.5.9.8.5, the
following test shall be performed concurrently with the 105mm gun synchronization tests of
4.6.4.9.5.1.1. With the 105mm gun on its zero aiming point, the cupola interlock shall be
engaged and the cupola machine gun line of sight shall be checked using a telescope and an
adaptor to check vertical centerline of the telescope with a corresponding line on the target.
4.6.4.9.8.6 Night vision. Prior to determine conformance to 3.5.9.8.6, the image intensifier
tube of the night vision channel shall be protected against damage from excessive incident light
by placing an opaque stop or mask over the objective lens of the night elbow. The hole in the
stop should be approximately 1/16 inch diameter and offset 1 inch from the stop's geometric
center. Acutation of the right elbow ON-OFF switch to ON shall cause the target image to
appear. Rotation of the night vision gain control (TUBE) clockwise shall increase the image
intensity. Verify that the reticle is not visible when the reticle control knob is in the OFF
position and becomes visible when the knob is rotated clockwise. Reticle brightness shall
increase rotation of the control knob and decrease with counterclockwise rotation.
4.6.4.10 Electrical system.
4.6.4.10.1 105mm gun firing circuits. To determine conformance to 3.5.10.1, the following
tests shall be conducted:
a. Utilizing a firing circuit tester with a 1.25 A load, verify that the circuits provide
sufficient power to fire the 105mm gun as each firing trigger is actuated.
b. Tests shall be conducted for proper probe grounding as specified, the dead man
switching feature, and proper interconnections of the emergency switch on the
manual elevation pump handle and emergency mode firing with the blasting machine.
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