I added JD field installed (kit) power steering to my 1989 950 4WD 5 years ago and since that install my frontend loader and 3 point hitch ran so slow they were almost unusable. I have question many people and my JD dealer without any solution. This week I found the problem and it required a very simple fix. The additional hydraulic fluid filter supplied in the kit has a design defect. The rubber supply hose (rubber hose connecting the filter housing to the metal tube going to the hydraulic pump) mounted to the filter housing under the right floor has a weak sidewall and sucks flat when the fluid reaches operating temperature. I ordered a new hose and found it was softer than my original. I shaped a length of welding rod into a coil ( just like some radiator hoses) and inserted it into the hose. I thought I should post this thinking it may save someone else 5 years of misery. Finally after all these years a solution!!!!!