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 19 of 344
TM 9-1240-400-34&P
ITEM
ITEM T0
NO.
BE INSPECTED
PROCEDURE
5
Valve and Cap
Inspect for damage such as bends or breaks and
ability to hold pressure; must not be bent or broken
and must hold pressure.
6
Window, Eyelens
Inspect for dirt, fungus or condensation, which may
obstruct view through eyepiece; must be clean and
free of moisture.
7
Elbow Assembly
Inspect by viewing through telescope to determine if
interfering fractures exist on window, lens, prisms or
reticle; chipped, scratched, or pitted optics that
interfere with field of view must be replaced with
authorized parts.
8
Deflection Knob
Use torque wrench and torque adapter (8599917) to
rotate knob in each direction.
Knob shall operate
within 4.00 to 8.00 in.-lb (0.45 to 0.90 N-m) of
torque.
9
Hand Crank
Swing on pivot pin to determine freedom of move-
ment.
Crank must not bind or show evidence of
excessive wear at pivot pin.
10
Direct-Indirect Knob
Rotate knob 360 degrees.
Knob must snap into
detents at 180 degree intervals, and must produce
an audible click at each 5 mil excursion of deflection
knob when set in DIRECT fire position.
2-3
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