TM-9-1240-401-34&P Technical Manual for M109 Telescopes and Mounts Download
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a. Disassembly TM 9-1240-401-34&P 1 2 Remove two screws (1) and cap (2) from cover (3). Remove four screws (4) and identification plates (5 and 6) from cover (3). 3 Pull wire (7) with lamp base through to front of overlay assembly (8). 4 Using tubular spanner wrench 11/16 inch and 45/64 inch, remove retaining ring (9). 5 Remove overlay assembly (8) from cover (3). 6 If necessary for replacement, remove two dial windows (10) and observation window (11) by tapping side facing interior of cover (3). Remove all fragments of glass. Scrape off all adhesive material. Avoid enlarging opening. 7 8 9 Remove two screws (12), two lockwashers (13), two insulator bushings (14), insulator plates (15 and 16), and contact (17). Discard lockwashers. Using 1/2 and 33/64 inch tubular spanner wrench, remove externally threaded ring (18). If necessary for replacement, remove electrical plug connector (19) and lens (20) by unsoldering wire from contact (17). Change 1 5.1-27