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 140 of 775

TM 9--2350--311--10

2--52

Change 6

Table 2--1. PREVENTIVE MAINTENANCE CHECKS AND SERVICES

FOR M109 SELF-PROPELLED HOWITZER — CONTINUED

Location

Item

No.

Not Fully Mission

Capable If:

Crewmember

Procedure

Item to Check/

Service

Interval

31

Before

M1A1/M1A2

CANNONEER NO. 1

Collimator

WARNING

The M1A1 collimator is radioactively illuminated. Check for presence of illumination and dam-

age. If discovered broken, damaged, or defective, follow the procedures listed on page b.

Before firing, check reticle (1) for correct alinement

and illumination. Make sure cross level vial (2) is

legible and free of cracks and breaks. Make sure

clamping knobs (3) hold M1A1/M1A2 collimator

securely. Check adjustment knob (4) for freedom of

movement.

1

2

4

3

3