Hydraulics

[STUART_BRENNAN@HP-Andover-om3.om.hp.com]

     Thanks to a visit to Cousin Al's parts emporium this weekend, I now 
     have a larger collection of spares for the future.  One question comes 
     to mind.  In the collection there's a NOS "still in the box" master 
     cylinder.  Looks beautiful.  But if I ever need to put it into 
     service, should I rebuild it first?  How long do the seals last on the 
     shelf?  Has anyone had any good or bad experiences?  
     
     Stu