This is a problem I noticed last year and thought I had it cured with a new seal in the powervalve tower but I see that there's some oily residue in the servo on the pto side cable.Now I can't for the life of me remember if that was the tower I put the new seal in or not but either way it's making a mess so I guess I will try another seal and see if it goes away.The mess is also inside the powervalve tower housing too which leads me to believe it's the seal that is letting the exhaust blow by the valve.Has anyone else experienced this and if so what did you do to solve the problem?