TM-9-1240-401-34&P Technical Manual for M109 Telescopes and Mounts Download
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TM 9-1240-401-34&P I 5-21. DOVE PRISM ASSEMBLY MAINTENANCE INSTRUCTIONS - continued a. Removal . 1 Remove setscrew (1) and setscrew (2). 2 Using fabricated spanner wrench, remove retainer (3). 3 Remove dove prism assembly (4) from M117/M117A2 panoramic telescope (5). 4 Remove inserts (6 and 7) by pushing out with scribe. b. Repair Repair is by replacement of authorized parts (ap- pendix D). c. Installation 1 Slide dove prism assembly (4) into M117/M117A2 panoramic telescope (5). 2 Apply grease to retainer (3). Using fabricated spanner wrench, install retainer (3). Retainer (3) applies tension to tube assembly (8). Tighten re- tainer (3) only enough to eliminate end play in tube assembly (8). 3 Install insert (7) and setscrew (2). 4 Install insert (6) and setscrew (1). 5-36