TM-9-1240-400-34-P
TELESCOPE; PANORAMIC: M115, ELBOW: M139, MOUNT: M138 AND M137
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL
OCTOBER 1993
TM-9-1240-400-34-P - Page 92 of 344
TM 9-1240-400-34&P
2
While sighting through eyepiece (3), rotate
deflection knob (4) and elevation knob (5), until
reticle coincides with projector collimator (6).
3
Rotate
azimuth
ring
(1)
800
mils,
counterclockwise.
4
Rotate deflection knob (4), clockwise, until
reticles coincide.
5
Check that line of sight does not deviate from
horizontal by more than 1.0 mil.
6
Rotate
deflection
knob
(4),
clockwise,
approximately
one-half
revolution
while
observing reticle.
7
Rotate
deflection
knob
(4)
slowly,
counterclockwise, until reticles coincide.
8
Check that line of sight changes no more than
0.5 mil from reading in step 5.
9
Repeat steps 3 thru 8 until head assembly (7)
has made 2 full revolutions.
10
If level travel exceeds tolerance specified on
page 2-74, check mounting surfaces of M115
panoramic telescope (8) and adapter fixture (9)
for dirt, nicks, or burrs.
If none of above
conditions exist, adjust optic cell assembly.
Refer to page 2-50.
CAUTION
Overtightening of plugs will cause
binding in deflection mechanism.
11
Check lift tolerance.
If lift exceeds tolerance
specified on page 2-74, loosen setscrews and
tighten plugs in cover (10).
2-75
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