TM 9-2350-230-12, C9
Table 4-1. PREVENTIVE-MAINTENANCE CHECKS AND SERVICES
INTERVAL AND
SEQUENCE
B - BEFORE OPERATION D - DURING OPERATION A - AFTER OPERATION
REFERENCE
B
D
A
ITEM TO BE INSPECTED
PROCEDURE
55
126
Coaxial Machine
Ascertain components are not damaged or missing.
Gun
SIGHTING AND FIRE CONTROL
56
M13AlC Quadrant
a.
legibility of scales and indices; clean as required. Check
that level vial rotating cover is in a protected position
when quadrant is not in use.
b.
Check for tightness of screws, binding, legibility of
scales, condition of level vial and cover. Check
adjustment.
57
Azimuth Indicator
a.
lamp if defective.
b.
Check for slippage and/or accuracy
58
M119 or M127
a. Inspect general condition and completeness. Check
Telescope and
that locking lever Is in detent position. Inspect
M149 Telescope
headrest . Check operation of diopter adjustment and
Mount
scale, filter selector lever bore sight knobs, slip
scales, and locking lever. Inspect lens and windows
for dirt, chips, cracks, and fungus growth. Check
electrical connections. Replace lamp if defective.
b.
Check for parallax and adjust to eliminate if found
c.
M127 telescope only: Check that dual power selector
lever is operable and seats firmly against stops.
59
XM44 Series Peris-
Inspect general condition and completeness. Check
cope and
operation of knobs and levers. Inspect lens and
and Table
Control Panelwindows for dirt, cracks, and chips. Check
electrical connections. Replace lamps if defective. Check
periscope washer fluid reservoir and refill.
60
Night Vision
a.
Inspect all components for dirt, loose, damaged,
Sight
or worn parts. Focus knobs must operate freely.
Objective lens focus knob locking device must have
positive locking action. Check eyepiece focus ring
for free operation and focusing. If defective, notify
organizational maintenance personnel.
b.
In darkened area, turn rotary control switch clockwise
to reticle (second click-stop) position and check for
and Table
switch clockwise through remaining three reticle lamp
positions and check for increasing brightness at each
position. If weak or no illumination, replace battery and/or
reticle lamp. If no light variation, report condition
to organizational maintenance personnel.
4-8.2