Thanks for the reply.  I did back the screw out for a minute and didn't see a change.  I'll try it again.  I do have all the manuals (operators, service and parts) and they are actual Oliver manual copies.  This is one of those things that you notice after you start going thru everything, the top case appears to have been changed out, a little lighter paint.  I'm wondering if the guy I bought it from used it for a parts tractor and it may have had the hydro-electric in it too.  Doesn't now.  I'm saying that only because he had a lot of Olivers and one of them was his Dads 1850.  Who knows, maybe, maybe not.  I have to get into the case anyway, someone snapped off both screws for the PTO lever a 1/4&quot; below the housing.  Any tips on getting them out???  Going to try a left hand drill bit before I tear into to it too hard.  Thanks again!!!