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 299 of 775

TM 9-2350-311-10

2-12 PREPARATION FOR FIRING — CONTINUED

2-12.4 Pre-Fire Checks — Continued

c. Breech

1

Witness marks (9) on breech ring (8) and breechblock (10) must aline when breechblock is closed.

2

Firing mechanism (11) and block assembly (12) must be working properly.

3

Primer chamber (13) must be clean and operating handle (14) securely latched forwvard.

d. Rammer Assembly

Perform rammer reliability checks (para 3-6.3).

2-201