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 Change 6 2--46.1/(2--46.2 blank) 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 27 Before M145/M145A1 Telescope Mount GUNNER Before firing, make sure elevation handwheel (1) and all knobs (2) are undamaged and move freely. Ensure level vials (3) are legible, that glass mirrors are not scratched, and vial covers move freely. Make sure LEDs illuminate vials. Inspect counters (4), making sure viewing windows are not broken and numbers move freely and read accurately. Make sure mounting is secure. Knobs won’t turn. Loose or defec- tive parts prevent proper operation. Level vials are cracked, broken, or illegible. Counters skip. Mounting is inse- cure. 1 2 3 4 2 2 3 3