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TM 9-1240-375-34&P
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9
2
7
6
1
1 fc 1 6 8
7.
Place plate-mounted level (2) on precision ground surface (7) of mounting bracket (6).
8.
Check that bubble in plate-mounted level (2) is level.
9.
Tighten setscrews (9). Recheck optical equipment test fixture (1), plate-mounted level (2), and
precision ground surface (7).
10.
Rotate plate-mounted level (2) 180 degrees from original position, and check again that bubble in plate-
mounted level (2) is centered.
NOTE
Check to make sure that optical equipment test fixture is still level in elevation and
cant.
6
10
1
1 fc 1 6 9
M17/M18 Quadrant
11.
Install M17/M18 quadrant (10) on mounting bracket (6) of optical equipment test fixture (1).
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