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--52 Change 6 Table 2--1. PREVENTIVE MAINTENANCE CHECKS AND SERVICES FOR M109 SELF-PROPELLED HOWITZER — CONTINUED Location Item No. Not Fully Mission Capable If: Crewmember Procedure Item to Check/ Service Interval 31 Before M1A1/M1A2 CANNONEER NO. 1 Collimator WARNING The M1A1 collimator is radioactively illuminated. Check for presence of illumination and dam- age. If discovered broken, damaged, or defective, follow the procedures listed on page b. Before firing, check reticle (1) for correct alinement and illumination. Make sure cross level vial (2) is legible and free of cracks and breaks. Make sure clamping knobs (3) hold M1A1/M1A2 collimator securely. Check adjustment knob (4) for freedom of movement. 1 2 4 3 3