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 3-6 ARMAMENT AND CAB MAINTENANCE - CONTINUED 3-6.8 Breech Mechanism a. Disassembly NOTE While disassembling breech mechanism, ensure that cam is not raised against M118A2/M118A3 elbow telescope. 1 With firing group block (1) in center position, push firing mechanism (2) into firing group block and rotate clockwise to remove. Only remove rack springs when breechblock is in closed position. Rack springs are under heavy pressure and could cause injury to personnel. Under no circumstances will removal of rack springs be attempted with breechblock open. 2 Depress plunger (3) with punch and slide rack plate (4) rearward until rack plate disengages from plunger. Change 2 3-58.3/(3-58.4 blank)