TM-9-2350-311-10

HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A2, M109A3, M109A4 AND M109A5

TECHNICAL MANUAL; OPERATOR’S MANUAL

NOVEMBER 1994

TM-9-2350-311-10 - Page 275 of 775

TM 9--2350--311--10

Change 6

2--177

2--12 PREPARATION FOR FIRING — CONTINUED

2--12.2

Boresighting — Continued

c. Checking M140/M140A1 Alinement Device While Boresighting on Test Target

1

Level gun trunnions (para 3--7.3).

2

Aline cannon tube, M117/M117A2 panoramic telescope, and M118A2/M118A3 elbow telescope on test

target (para 2--12.2b.).

WARNING

The M140 alinement device is radioactively illuminated. Check for loss of luminescence,

breakage, damage, or defects. If present, follow the procedures on pages b and c.

3

Install M140/M140A1 alinement device (27) on dovetail door wedge (28) in front of panoramic telescope

ballistic cover (29).

27

28

29