Quantcast Azimuth Mechanism 800-mil Steps and Level Travel Inspection - continued -820360616

 

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Azimuth Mechanism 800-mil Steps and Level Travel Inspection - continued -820360615
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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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Azimuth Mechanism 15-mil Steps Inspection
TM 9-1240-375-34&P
0100 00
TEST AND INSPECTION - Continued
Azimuth Mechanism 800-mil Steps and Level Travel Inspection - Continued
12.
Looking through eyeshield (10), check the following:
Vertical reticle line must be centered on collimator reticle target within 1 mil.
a.
Horizontal reticle line must be centered on collimator reticle target within 1 mil (2-mil total
b.
spread).
c.
Record readings taken in steps a and b above for two full revolutions and compare readings.
Ensure total spread does not exceed specified tolerances for level travel and azimuth error.
5
1 fc 6 7 0
Check that reading on deflection counter (5) is 4000 0.25 mil.
13.
14.
Repeat steps 10 through 13 using the settings in Table 1, until each reading obtained is verified two
times.
4
1 fc 6 7 1
15.
Repeat entire test turning azimuth knob (4) counterclockwise.
0100 00-20

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