OK Gary, here we go again . . . this is my best shot at what you have, so here goes. When the hydraulics don't want to lower the implement back to the ground, it is usually a problem with the top link being too long - so wind it in a bit to reduce top link length. If the top link geometry is wrong, then when you lift the plough it compresses the spring you can see behind the top link under the seat, which makes the hydraulics think they need to lift to clear an obstruction (eg when ploughing ( = plowing to you) - so when thinking they need to lift, you ask them to lower which they don't want to because the spring is under pressure - and things get really confused mechanically speaking. Tractors are sensitive to geometry - I found this out last year when ploughing with a Category 2 plough that had been 'modified' to fit a Category 1 tractor - it took me weeks of fiddling, resetting the hydraulics and some helpful feedback from John (UK) before I finally fixed it. As far as the oil coming from round your PTO shaft is concerned, that is just a seal gone, possibly due to bearing failure round the exposed end of the shaft. This is not a big problem, and is easily fixed - so is cheap :) Another thing you could check is that when your plough is raised or lowered, that the PTO drive shaft on the implement is not under pressure and is free to slide about a bit - if the shaft is too long it will put undue pressure on the tractor PTO which will not be good long term. Hope this all makes sense - I'll check in tomorrow 23/12/04 to see if you have any questions I can answer before you wake up. HTH
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