How is the lead in the sulzer fuel pump checked ? How is the cam fitted, is it a shrunk fit on the shaft ?

In  Sulzer engine  the  cam  is  keyed  to  the  shaft,  whereas  in  B&W engine  the  cam  is  shrunk  fit  and  can  be  shifted  + or- 2⁰ by  a  hydraulic  deshrinking  method,  which  is  resorted to  during  chain  tightening  process.