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 2-11 OPERATION OF FIRE CONTROL EQUIPMENT UNDER NORMAL CONDITIONS — CONTINUED 2–11.2 M118A2/M118A3 Elbow Telescope and M146 Telescope Mount — Continued c. Operation of M118A2/M118A3 Elbow Telescope and M146 Telescope Mount 1 Be sure kingpin (3) is tight. 2 Remove quick-release pin (17) and M42 tank periscope (18) cover door (19). Lock cover door in open position with quick-release pin. 2-144