TM-9-1240-401-34&P Technical Manual for M109 Telescopes and Mounts Download
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TM 9-1240-401-34&P 5-17. M117/M117A2 PANORAMIC TELESCOPE MAINTENANCE INSTRUCTIONS - continued I a. Disassembly - continued I 28 Remove coupling (38), preformed packing (39), and felt mechanical washer (40) from upper hous- ing (12). Discard preformed packing and felt me- chanical washer. 29 Remove counter assembly (ref. para 5-22). 30 Unsolder wire (41) from headed straight pin (42). Remove retaining ring (43), headed straight pin (42), spring (44), and insulator bushing (45). 31 Unsolder wire (41) from headed straight pin (46). 32 Remove insert (47), retaining ring (48), headed straight pin (46), spring (49), and insulator bushing (50). I b. Repair I 1 Remove corrosion, grease, and dirt from all parts. Refer to TM 9-254 for cleaning instructions. 2 Visually inspect for missing or damaged parts. 3 Repair or replace parts in accordance with author- ized parts listed in appendix D. I c. Assembly I 1 Install insulator bushing (50), spring (49), headed straight pin (46), and retaining ring (48). Install insert (47). 2 Solder wire (41) to headed straight pin (46) using solder and flux. 3 Install insulator bushing (45), spring (44), headed straight pin (42), and retaining ring (43). Solder wire (41 ) to headed straight pin (42) using solder and flux. 4 Install counter assembly (ref. para 5-22). 5-28