TM-9-1240-401-34&P Technical Manual for M109 Telescopes and Mounts Download
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3-46 TM 9-1240-401-34&P 3-27. OBJECTIVE AND DIAPHRAGM SUBASSEMBLY MAINTENANCE INSTRUCTIONS This task covers: a. Disassembly b. Repair c. Assembly Tool Kit, Electronic System, Repair, Field Mainte- nance (SC5180-95-CL-B29) 5180-01-168-0487 M118A2/M118A3 elbow telescope removed from howitzer (TM 9-2350-311-10) Tubular spanner wrench, 2 and 2-1/64 inch (Item 33, appx F) Elbow telescope subassembly, eyepiece and TM 9-254 erector lens subassembly removed from M118A2/M118A3 elbow telescope (ref. para a. Disassemble 1 Remove setscrew (1). 2 Using 2 and 2-1/84 inch tubular spanner wrench, remove cell assembly (2) from tube assembly (3). b. Repair 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. c. Assembly 1 Using 2 and 2-1/84 inch tubular spanner wrench, install cell assembly (2) in tube assembly (3). 3-21) 2 Install setscrew (1) to secure cell assembly (2).