TM-9-2350-311-10 M109 Operator's Manual for M109A2, M109A3, M109A4 and M109A5 Download
Page 466 of 775
TM 9-2350-311-10 3-6 ARMAMENT AND CAB MAINTENANCE — CONTINUED 3-6.8 Breech Mechanism — Continued a. Disassembly — Continued 10 Rotate plunger assembly (19) to lock with cam plate (21). Plunger assembly is now held in place and disengaged from nut (17). Go to step 13. 11 Remove two cap screws (14 or 22), two Iockwashers (15 or 23) and plunger assembly (16 or 19). Go to step 13. NOTE • Perform step 12 for M109A5 M284 cannon assembly containing plunger assembly 11580469. • When the plunger assembly is pulled out and locked in position B, the nut and spindle assembly can be removed without the housing and firing group block. Position C allows the removal of all components. • If the plunger assembly cannot be pulled out easily, a screwdriver or pry tool can be inserted between the plunger tip and nut. Applying leverage will free plunger assembly. 12 Move pin (24) located on top of plunger assembly (25), against spring (26) from position A to position B or C. 3-62