TM-9-1240-401-34-P
TELESCOPE MOUNT M146: M118A2 AND M118A3; TELESCOPE MOUNT M145: M145A1; PANORAMIC TELESCOPE: M117 AND M117A2; FIRE CONTROL QUADRANT: M15; PERISCOPE: M42
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL
JULY 1993
TM-9-1240-401-34-P - Page 62 of 590
3-4
TM 9-1240-401-34&P
3-6. INITIAL INSPECTION
M118A2/M118A3 ELBOW TELESCOPE
Item No.
Item To Be Inspected
Procedures
1
M118A2/M118A3 ELBOW
Inspect M118A2/M118A3 elbow telescope (1) for completeness and
TELESCOPE
secureness of parts.
2
IDENTIFICATION PLATE
Check that print on identification plate (2) is legible and clearly
defined.
3
MOUNTING SURFACE
Check that mounting surface (3) is free of burrs and
corrosion.
4
EYESHIELD
Inspect eyeshield (4) for security of attachment and damage such
as deterioration, cuts, or tears.
5
VALVE CORE AND
Inspect valve core and air valve cap (5) for damage such as bends
AIR VALVE CAP
or breaks and ability to hold pressure.
6
OPTICS
Inspect optics (6) for dirt, fungus, scratches, chips or condensation,
which may obstruct view through eyepiece.
Inspect view 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.
7
RETICLE
Check reticle (7) for clarity and illumination.
8
LEVEL ASSEMBLY
Check that level (8) is free of cracks and breaks and
that
graduations are legible. Check that mirror (9) on level assembly
is
not
scratched.
9
WORMSHAFT ASSEMBLY
Check that knobs on wormshaft assembly (10) move freely without
binding or excess torque.
10
VARIABLE RESISTOR
Check that variable resistor knob (11) moves freely and that light
changes from dim to bright and bright to dim.
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