TM-9-1240-401-34&P Technical Manual for M109 Telescopes and Mounts Download
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6-7 TM 9-1240-401-34&P I c. Assembly 1 2 3 4 5 6 7 8 9 10 11 12 Apply sealing compound to opening of M42 peri- scope and install window (25). Install seal (24) and retaining ring (23); secure with thru new Iockwashers (22) and three machine screws (21 ). If removed, install two headless straight pins (20). Apply adhesive to cover assembly (19) and install on M42 periscope. Secure with 12 new lock- washers (18) and 12 machine screws (17). Apply sealing compound to opening of M42 peri- scope and install window (16). If removed, install two headless straight pins (15). Apply adhesive to plate and mirror (14) and install on M42 periscope. Secure with 12 new lock- washers (13) and 12 machine screws (12). Install two retaining plates (11) and secure with four new Iockwashers (10) and four machine screws (9). If removed, install two headless straight pins (8). Install purging machine screw (7). Install retaining strap (6) on purging valve stem (5). Apply adhesive to threaded portion of purging valve stem (5) that screws into periscope housing. Install purging valve stem (5), valve core (4), and air valve cap (3). Install identification plate (2) and secure with two machine screws (1).