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 439 of 775

TM 9--2350--311--10

Change 6

3--39

3--6

ARMAMENT AND CAB MAINTENANCE — CONTINUED

3--6.1

Maintenance of Sighting and Fire Control Equipment — Continued

e. M1A1 Collimator

WARNING

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

damage. If discovered broken, damaged, or defective, follow the procedures on pages b

and c.

CAUTION

The M1A1 collimator has an airtight seal. Breaking seal by removing any part will expose

internal mechanism to moisture and may eventually impair operation of instrument.

1

Follow maintenance instructions of sighting and fire control for inspection and care of M1A1 collimator

(10) (para 3--6.1a. and 3--6.1b.)

2

Notify unit maintenance for correction of unserviceable components.

10