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Explain  the  reasons  for  seals  in  the  fuel  pump of  main  engine  and  why  are  they  required.

Function 4B main  engine   seals   fuel  pump
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In  the  modern  B&W  MC engine  an  umbrella  seal between  plunger  and  barrel  at  the  bottom is  provided  to  prevent  leakage  of  fuel  oil  into  the  cam  case  , thereby  preventing  the  dilution  and contaminating  the  lub oil. hence  it  is  needed.

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