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 246 of 775

TM 9--2350--311--10

2--148

Change 6

2--11 OPERATION OF FIRE CONTROL EQUIPMENT UNDER NORMAL CONDITIONS

— CONTINUED

2--11.2

M118A2/M118A3 Elbow Telescope and M146 Telescope Mount — Continued

d. Quick Alinement of M118A2/M118A3 Elbow Telescope Using the M140/M140A1 Alinement Device —

Continued

NOTE

Ensure mounting surfaces are clean and free of burrs. If dovetail door wedge has burrs, notify

unit maintenance.

2

Driver slips M140/M140A1 alinement device (23) onto dovetail door wedge (24) in front of M42 tank

periscope (25) cover door (26).

2.1

If using ERLS version, depress button (27) to activate.

3

Sighting through M118A2/M118A3 elbow telescope (1) eyepiece (21) at M140/M140A1 alinement

device (23), line up apertures as shown. At this setting, M118A2/M118A3 elbow telescope is in close

alinement with cannon tube.

4

Driver removes M140/M140A1 alinement device (23) from dovetail door wedge (24) and hands it to

gunner for stowage.