TM 9-1240-400-34&P
Section VI. GENERAL SUPPORT FINAL INSPECTION PROCEDURES
3-11.
GENERAL.
a. This section describes and illustrates the final inspection of the M139 elbow telescope. A final inspection will
be performed prior to returning the M139 elbow telescope to the using unit or to the supply system.
b. If the M139 elbow telescope inspected fails to meet the required standards, ensure that all maintenance
authorized at the applicable level has been performed correctly.
3-12.
FINAL INSPECTION INSTRUCTIONS.
This task covers:
a.
Visual inspection
b.
Eyepiece assembly focus inspection and adjustment
c.
Setting up and adjusting telescope test fixture
d.
Mounting M139 elbow telescope on telescope test fixture
e.
Parallax inspection and adjustment
f.
Reticle plumb/collimation inspection and adjustment
g.
Illumination inspection
h.
Purging and charging
INITIAL SETUP:
Tools and Special Tools
General Safety Instructions
Tool kit, electronic: system maintenance
(SC 5180-95-CL-B29 )
WARNING
Injection gun, hand (7648117)
Materials/Parts
Use adhesives, cleaning solvents,
Sealing compound (item 10, appx C)
and sealing compounds in well-
ventilated area away from open
Reference
flame. Adhesives, cleaning sol-
TM 9-254
vents, and sealing compounds are
harmful to skin and clothing, can
burn easily, and may give off
harmful vapor.
3-18
