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 TM 9-1240-375-34&P
0073 00
TEST AND INSPECTION - Continued
Mount Rigidity Inspection - Continued
Table 1. Mount Rigidity Inspection--Elevation, Cant, and Total Movement Data.
Elevation
Elevation
Cant angle
Total movement
(mils)
(degrees and minutes)
(mils)
(mils)
0
0
0
0.25
800
44 54'
0
0.75
1100
51 53'
0
1.75
1333
74 59'
0
3.50
Azimuth Correction Inspection
1
3
4
2
1 fc 4 7 6
1.
Secure M137/M137A2/M137A3 telescope (1) to optical instrument support (2).
2.
Level the cross-leveling fixture in elevation and cant.
NOTE
Ensure bubble in cross level vial and bubble in elevation level vial on M171/M171A1
mount are centered.
3.
Set azimuth counter (3) at 4800 mils.
4.
Release azimuth counter eccentric (4), align M137/M137A2/M137A3 telescope reticle line on wall
target, and engage azimuth counter eccentric.
0073 00-34
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