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TM 9-1240-375-34&P
0073 00
NOTE
While performing backlash check, a C-clamp and pointer may be used instead of a
scribed line on cross level knob.
11
5
1 fc 4 5 9
7.
Scribe one line across both cross level knob (5) and optical instrument rocker assembly (11).
NOTE
Do not go past the scribed line when turning cross level knob counterclockwise.
Ensure scribed lines are in perfect alignment.
5
1 fc 4 6 0
8.
Turn cross level knob (5) at least 1/2 turn clockwise.
9.
Turn cross level knob (5) counterclockwise until scribed lines are aligned.
0073 00-25
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