TM-9-2350-311-10 M109 Operator's Manual for M109A2, M109A3, M109A4 and M109A5 Download
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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