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 b. inspection of Spindle Assembly Components — Continued 3 Gouges in surface between obturator pad (36) and retaining rings (34 and 37) mating surfaces are normal and will not hinder operation, unless gouging is over 50% of obturator pad. 4 If there is evidence of leakage past breech ring assembly, replace obturator pad (36). 5 Inspect spindle (32) and retaining rings (34 and 37) for burrs or cracks. If burrs or cracks are present, notify unit maintenance. 3-70