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Page Title:
Pitch Level Backlash Inspection |
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 TM 9-1240-375-34&P
0073 00
1.
Center bubble in elevation level vial (1) and bubble in cross level vial (2) using cross level knob (3) and
elevation knob (4).
7
8
5
9
6
1 fc 4 6 3
2.
Set fire control quadrant (5) at zero, and place on adapter plate (6).
3.
Level bubble (7) in fire control quadrant (5) should be centered. If level bubble is not centered, use
micrometer knob (8) to center.
4.
Record reading on micrometer (9).
NOTE
A C-clamp and pointer may be used instead of a scribed line on elevation knob while
performing backlash check.
10
4
1 fc 4 6 4
5.
Scribe one line across both elevation knob (4) and housing assembly (10).
0073 00-27
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