TM-9-6675-262-10
AIMING CIRCLE M2 W/E AND M2A2 W/E
TECHNICAL MANUAL; OPERATOR MANUAL
DECEMBER 2013
TM-9-6675-262-10 - Page 47 of 68
0008-1
0008
PREVENTIVE MAINTENANCE CHECKS AND SERVICES
INITIAL SETUP:
N/A
Table 1.
Preventive Maintenance Checks and Services.
Item
No.
Interval
Item to be
Checked or
Serviced
Procedure
Equipment Not
Ready / Available
If:
1
B/A
AIMING CIRCLE
Clean exposed surfaces of
optical elements with lens
tissue.
Any optical surfaces are
chipped or cracked.
2
3
4
5
6
B
B/D
B
D
D
AIMING CIRCLE
AIMING CIRCLE
AIMING CIRCLE
AIMING CIRCLE
AIMING CIRCLE
Check that base plate cover
pivots freely.
Check for looseness or
binding in azimuth, orienting,
and elevation knobs.
Check for loose or damaged
level vials.
Turn azimuth knob until
azimuth scale reads 0.
Check
that azimuth micrometer scale
also reads 0 and that circular
level bubble and main
housing tube level bubble
remain centered while the
Aiming Circle is rotated
through 6400 mils.
Turn elevation knob until
elevation scale reads 0.
Check that elevation
micrometer scale also reads 0
and that elbow telescope tube
level bubble is centered.
Base plate cover is
missing, broken, or
binds.
Any of the controls have
looseness, sticking, or
binding.
Level vials are loose or
broken.
Scales will not match up
and /or level bubbles will
not remain centered.
Scales will not match up
and/or level bubble is not
centered.
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