I have a problem similar with my 4625sx Eaton 70344 Hydrostatic Pump Trunnion/Control Shaft Seal similar to a Bobcat poster had a few years ago - oil leaking out of the shaft. Does anyone know if the shaft on my pump has a similar o-ring setup? I replaced the Trunnion Seal but it did not help. Can the shaft be removed while hydrostat is still in the skidsteer? http://www.skidsteerforum.com/DesktopDefault.aspx?tabid=54&frmView=ShowPost&PostID=20417 Sorry, I can't get the HTML to work, but you can see the PostID of the post Im referring to.