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 334 of 775

TM 9--2350--311--10

2--236

Change 4

2--15 MISFIRE PROCEDURES

2--15.1

General

a. Precautions

Conditions described in this section are rarely encountered when authorized and properly maintained ammunition is

fired in a properly maintained and operated weapon. However, to avoid injury to personnel and damage to equipment,

it is important that all concerned understand the following.

1

What is involved when this weapon fails to fire.

2

What should be done when a failure to fire occurs.

WARNING

•

Do not use charge 1 with howitzer to avoid injury to personnel.

•

When the authorized rates of fire for the howitzer are exceeded, propelling charge

cook-offs may occur within 1 minute after chambering causing injury to personnel.

CAUTION

When firing any combination of charge 8 and lower charges within the same sustained fire

mission, charge 8 rates of fire apply to prevent premature equipment failure.

3

Authorized Rates of Fire.

Maximum rate:

4 rds/min for three minutes

Sustained rate:

Charge 2--7 -- 1 rd/min

Charge 8

-- 1 rd/min for 60 minutes;

1 rd/3 min thereafter