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 — Continued a. Disassembly—Continued 3 4 NOTE Use clean rag (item 35, Appx D) to catch stop plate and rack springs. With breechblock closed, drive rack plate (4) rearward with hammer. Stop plate (5) and rack springs (6) will now pop out. NOTE Adjuster may have lugs for an adjustable wrench or holes for a spanner wrench. Release pre-load on closing spring using adjustable wrench or spanner wrench. Apply clockwise pressure on adjuster (7) and depress adjuster plunger (8). Rotate adjuster slowly counterclockwise until all torque has been relieved. 3-59