Quantcast Setting Up and Adjusting the Cross-Leveling Fixture - continued -820360417

 

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Setting Up and Adjusting the Cross-Leveling Fixture - continued -820360416
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TM-9-1240-375-34-P Quadrant Fire Control: M17 (1290-01-037-3883) and M17A1 (1290-01-515-8260); Mount Telescope and Quadrant: M171 (1240-01-039-7273) Manual
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Setting Up and Adjusting the Cross-Leveling Fixture - continued -820360418
TM 9-1240-375-34&P
0073 00
29
32
1 fc 4 2 5
27.
Place leveling bar (32) on seat of inspection aid support assembly (29).
31
34
35
33
29
32
1 fc 4 2 6
28.
Place leveling bar (33) across leveling bar (32).
29.
Level inspection aid support assembly (29) in cant using leveling bars (32 and 33) and fire control
quadrant (31).
30.
Center level bubble (34) in inspection aid support assembly (29) by rotating eccentric (35), if not
already centered.
31.
Rotate elevation handwheel until elevation vernier scale reads 60 degrees or 1066 mils. Check that
level bubble (34) in inspection aid support assembly (29) stays centered.
32.
Repeat steps 30 and 31, checking that level bubble (34) in inspection aid support assembly (29) stays
centered at 0 and 1066 mils elevation. If necessary, adjust eccentric (35).
0073 00-9

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