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ARMY    TM9-2805-262-14 AIR  FORCE  TO  38G2-90-1 NAVY   NAVFAC   P-8-613-14E 6-13.  Crankshaft   and   Center   Main   Bearing. This  task  covers: a. Removal b.  Inspection c.  Installation INITIAL  SETUP Tools Materials/Parts General  Mechanic’s  Tool  Kit  (Item  1,  Appendix  B) Lockwasher,  Tab  (P/N  9786E113-2) Snap  Ring  Pliers Screw with Washer Main Bearing Wrench,  Torque  (NSN  6110-00-853-4538)  (Item  5, (P/N   13218E0504-70) Appendix  B) Equipment   Condition Materials/Patts Oil pan removed (para.5-20). Rags,  Wiping  (Item  7,  Appendix  D) End cover removed (para.6-9). Solvent,  Drycleaning  (Item  8,  Appendix  D) NOTE Engine  is  upside  down  for  these  procedures. a. Removal. (figure 6-8) (1) (2) (3) (4) (5) (6) (7) (8) Bend tangs on Iockwasher (1), and remove two bolts (2) and connecting rod bearing cap (3). Push piston and connecting rod (4) into top of cylinder (5). Repeat steps 1 and 2 for remaining pistons. Using  suitable  snap  ring  pliers,  remove  two  retaining  rings  (6). Remove  camshaft  gear  (7). Remove  screw  (8)  and  washer  (9)  securing  center  main  bearing  (10). Remove  crankshaft  (11)  with  center  main  bearing  (10). Remove  two  screws  (12)  and  washers  (13)  and  remove  center  main  bearing  (10). b.  Inspection. Drycleaning  solvent  PD-680  used  to  clean  parls  is  potentially  dangerous  to  personnel  and property, Avoid repeated and prolonged skin contact. Do not use near open flame or excessive heat. Flash point of solvent is 100°F-138°F (38°C-60°C). 6 - 18


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