TM-9-1290-262-24-P

AIMING CIRCLE, M2A2, W/E

TECHNICAL MANUAL; UNIT, DIRECT SUPPORT,AND GENERAL SUPPORT MAINTENANCE MANUAL

SEPTEMBER 1994

TM-9-1290-262-24-P - Page 99 of 192

ARMY TM 9-1290-262-24&P

MARINE CORPS TM 00476C-24&P

AIR FORCE TO 49A7-3-72/74

PARALLAX OF MAGNIFIER ASSEMBLY

1

2

3

4

5

6

7

8

9

Turn aiming circle so that the letter N on

the aiming circle body is pointing in the

general direction of north.

Place hand light (1) from M51 instrument

light over the housing cover window. Light

should illuminate damper and needle reti-

cle.

Look into dioptometer (2) eyepiece and

turn eyepiece until reticle is in sharpest

focus.

Hold dioptometer (2) against magnifier (3).

Unlock compass needle. Rotate aiming

circle azimuth knob (4) until etched line on

compass needle is next to, but not touch-

ing, dioptometer reticle.

Slide dioptometer knob (5) for sharpest

focus of compass needle etching. Diop-

tometer scale reading should be between

0 and -0.50.

Screw magnifier assembly in or out, as

required.

Repeat step 3 and check parallax. It must

not exceed 1 mil (one reticle line width).

Seal magnifier assembly by injecting seal-

ing compound (item 8, appx D) into the

two injection sealing ports. See TM 750-

116.

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