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 — CONTINUED 2-11 OPERATION OF FIRE CONTROL EQUIPMENT UNDER NORMAL CONDITIONS 2-11.2 M118A2/M118A3 Elbow Telescope and M146 Telescope Mount — Continued c. Operation of M118A2/M118A3 Elbow Telescope and M146 Telescope Mount — Continued In order to prevent damage to M118A2/M118A3 elbow telescope, stow against upper stop when not in use. Do not use as a handhold under any circumstances. NOTE Red index line and arrow located on side below wormshaft assembly knob serve as a direction reference only and will be alined only when instrument and vehicle are both level. M118A2/M118A3 elbow telescope does not have a reticle selection lever. It has only one 7 8 9 10 reticle in a fixed position. Enter boresight corrections by adjusting elevation knob (11) and deflection knob (13) on Ml146 telescope mount (2) while reading proper value on elevation dial (12) and deflection scale dial (14). Locate and place target on appropriate range line of reticle (22) by traversing and elevating weapon (para 2–10.8). NOTE Always check to see that bubble is centered in level vial every time weapon is elevated or traversed. Turn wormshaft assembly knob (10) to center bubble in level vial (7). Repeat steps 8 and 9 until target is properly alined and bubble in level vial (7) is centered. 2-146