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 604 of 775

TM 9--2350--311--10

5--68

Change 4

5--8

LOADING AND FIRING — CONTINUED

6

Remove the igniter protective cap from propelling charge and load propelling charge into cannon

chamber with igniter end (red bag) toward the breechblock assembly.

WARNING

Never close the breechblock assembly unless you can see the red igniter pad on the base of the

propelling charge. Misfires, hangfires, erratic performance, or other critical malfunctions could

result causing injury to personnel.

7

Close and lock the breechblock assembly.

WARNING

Never insert primer in primer chamber unless breechblock assembly is closed and locked.

Ignition of the propelling charge with breechblock assembly not fully closed presents a critical

hazard to the crew.

8

Insert primer and move firing mechanism block assembly to firing position and fire on command of the

chief of section.