Have 7720 hydro,has a bad noise under cab,sounds like metal scraping, pulley rubbing but its not that,only does it when combine leans to the right,very slight sidehill will set it off,does it with the seperator on or off, put new bearings in tail shaft, didnt help. Sounds like maybe hyd relief valve noise but its not that,only does it when it leans..any ideas thanks.