LUBRICATION AND ADJUSTMENT OF BEARINGS. 45 



ing. No one but a good mechanic, skilled in this work should 

 undertake to babbitt the main bearings. The difficulty lies 

 in the alignment, which must be perfect, before the babbitt 

 is poured. The babbitt should be of the best quality. 



The Eccentric Strap is tightened by removing the paper 

 liners. When the halves come together, they should be 

 taken to a machine shop and a little planed off. The eccen- 

 tric rod brasses and valve rod brasses on engines having 

 rocker-arms are taken up by driving down the wedges or 

 keys. 



