TM 91240-400-34&P
NOTE
Etching which reads "8 IN.
HOW.
M110A1 (MILS)" on the M139 elbow telescope reticle must be
positioned at the top.
3
Look through the M139 elbow telescope (4) and rotate reticle (5) with scribe through screw hole until the N line is
superimposed on the verticle line (6) of collimator projector (1) within 0.5 mil.
4
If reticle (5) does not rotate freely, remove setscrew (7) and eyepiece assembly (8). Loosen retaining ring (9).
Install eyepiece assembly and setscrew (7).
5
Adjust remaining three setscrews (3) securing reticle by rotating with scribe until the N line in reticle of the M139
elbow telescope (4) is superimposed on the vertical line (6) of collimator projector (1) reticle within 0.5 mil.
6
Remove setscrew (7) and eyepiece assembly (8), and tighten retaining ring (9).
7
Install setscrew (3).
8
Install eyepiece assembly (8). Install setscrew (7) and tighten.
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