TM 10-3930-664-24 4. Carefully         pull         assembled         piston         and connecting rod (7) out  of  cylinder  block,  making sure  piston  bore  is  not  scratched  or  marred  in any way. 5. Using  pliers,  remove    retaining  rings  (11)  from piston pin (12). 6. Remove piston pin (12) from piston (10).Remove connecting rod (9). CAUTION Use care when removing piston ring set to prevent damage to piston. 7. Using pliers, carefully remove piston ring set (13) from piston (10). B. CLEANING 1. Clean  pistons,  pins,  and  connecting  rods  in  a solution of laundry detergent and hot water. CAUTION Use    care    when    cleaning    piston    ring grooves to prevent damage. 2. Clean  carbon  deposits  from  piston  ring  grooves using the square end of a broken ring. 3. Wash  pistons  again  in  laundry  detergent.  Allow to air dry. 4. If carbon deposits remain, soak pistons overnight        in    cleaning    solvent.        Refer        to paragraph 1-24. 4-22