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TM 9-1240-375-34&P
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7
5
6
1 fc 4 5 5
4.
Turn cross level knob (6) until level bubble (7) in fire control quadrant (5) centers. If bubble does not
center, M171/M171A1 mount is defective.
5.
Reverse fire control quadrant (5).
6.
Turn cross level knob (6) until level bubble (7) in fire control quadrant (5) centers. If level bubble does
not center, M171/M171A1 mount is defective.
Cant Backlash Inspection
1
2
1 fc 4 5 6
1.
Fasten adapter plate (1) to optical instrument support (2).
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