TM-9-1200-215-34&P Technical Manual for M109 Automatic Fire Control System (AFCS) Download
Page 90 of 266
TM 9–1200–215–34&P 2–55 2–25. ACU HANDLE MAINTENANCE INSTRUCTIONS CONTINUED a. REMOVAL CONTINUED 3. Remove stabilizer brackets in accordance with procedure outlined in paragraph 2–14. 4. Remove two insulating blocks (1) by removing three screws (2), three lockwashers (3), and three flat washers (4). Discard lockwashers. 5. Remove screw (5) and CPU CCA heatsink (6) from spacer assembly in ACU. 6. Remove screw (7) and flat washer (8) from holddown of CPU CCA. 7. Loosen screw (9) (approximately six turns) in Loktainer of CCA. 8. Gently loosen CPU CCA (10) from backplane (11). Do not remove from ACU housing. 9. Remove handle (12) by removing two nuts (13) and two star washers (14). 10. Inspect gaskets (15) on handle for cuts, nicks, or signs of stretching. Discard gasket if unserviceable. NOTE Screw and seal are a unit. They cannot be requisitioned separately . 11. Remove hard disk drive (16) from ACU by removing four screws with seals (17) on side of ACU. Discard screws with seals. b. INSTALLATION ESD SENSITIVE The ACU contains ESD sensitive components. Wear a protective ESD wrist strap whenever handling components. Failure to comply may result in damage to equipment. NOTE When installing handle to left side of ACU, perform steps 1 through 10 and 13. When installing handle to right side of ACU, perform steps 1, 2, 3, 11, 12, and 13. Change 1 1 1 2 3 4 2 3 4 5 6 7 8 9 10 11 12 12 13 13 14 14 15 15 16 17