Quantcast Cleaning - TM-9-2815-202-34_514

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TM9-2815-202-34 6-34.  PISTON  AND  CONNECTING   ROD  MAINTENANCE  (TRUNK  TYPE)  (Cont) c. d. Cleaning WARNING l l (1) Use  goggles,  rubber  gloves,  and  rubber  apron  when  cleaning  parts  in carbon-removing  corn-pound.  Provide  adequate  ventilation.  Avoid inhaling fumes and contact with skin. If compound is splashed on skin, flush with water and wash with alcohol. Alcohol containing 2 or 3 percent  camphor  is  preferable.  If  contact  with  eyes  is  made,  flush  eyes with  water  and  get  medical  aid  immediately. Compressed  air  used  for  cleaning  purposes  will  not  exceed  30  PSI. Use  only  with  effective  chip  guarding  and  personal  protective equipment  (goggles/shield,  gloves,  etc). Clean piston components with fuel oil and dry with compressed air. If fuel oil does not remove  carbon  deposits,  use  carbon-removing  compound  which  will  not  harm  bushings  or tin  plating  on  piston. CAUTION Do not damage tin plating on piston skirt. Upper section of piston, including compression ring lands and grooves, is not tin-plated. Wire brush upper section only to remove any hard carbon. (2) Clean ring grooves with suitable tool or a piece of an old compression ring ground to a beveled  edge. (3) Clean inside surfaces of piston and oil drain holes in piston skirt. Do not enlarge holes while cleaning  them. Inspection (1)  Piston CAUTION Do not remove bushings in piston or connecting rod. These parts are not serviced. (a)  Check  cylinder  liner  and  block  bore  for  excessive  out  of  round,  taper,  or  high  spots which could cause failure of piston (see Para 4-34). NOTE Overheating  or  burned  spots  on  piston  may  indicate  an  obstruction  in  connecting  rod oil  passage. 6-32


 


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