TM-9-1200-215-34&P Technical Manual for M109 Automatic Fire Control System (AFCS) Download
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TM 9–1200–215–34&P 6–9 6–13. TOP COVER ASSEMBL Y MAINTENANCE INSTRUCTIONS DESCRIPTION This task covers: a. Removal b. Installation INITIAL SETUP Tools: Tool Kit, JTK–17LAL, TK–101/G, or TK–105/G (items 34, 35, & 36, Appendix E) Torque Wrench, 0–15 in.–lb (item 39, Appendix E) Torque wrench, 0–75 in.–lb (item 40, Appendix E) Work Station Kit, Electronic (item 38, Appendix E) #2 Crosstip Screwdriver Socketwrench (item 22, Appendix E) 3/16” Flat Tip Screwdriver Socketwrench (item 23, Appendix E) Equipment Condition: Unenergized PCU is on workbench Personnel Required: Two MOS 35Y a. REMOVAL CAUTION ESD SENSITIVE The PCU contains ESD sensitive components. Wear a protective ESD wrist strap whenever handling components. Failure to comply may result in damage to equipment. 1. Attach ESD grounding strap to wrist and ground to ensure ESD protection. 2. Remove top cover assembly (1) by removing 22 screws (2) and 22 flat washers (3). CAUTION The top cover assembly is attached by cables to the internal components of the PCU. Exercise caution when removing top cover assembly from PCU housing. Failure to comply may result in damage to equipment. 3. Move top cover assembly (1) off housing to allow access to PCU Main CCA connectors. 4. Unscrew two captive screws (4) from connector P10 (5). Disconnect connector P10. 5. Unscrew two captive screws (6) from connector P11 (7). Disconnect connector P11. 6. Unscrew two captive screws (8) from connector P12 (9). disconnect connector P12. 3 1 2 4 5 7 6 9 8