Hello this is my first large tractor and I am wondering what RPM to run it under load, when I am loading millings. Reason I am asking is because it seams to me that it is wining louder then it should. I am running it at the PTO rpm which I think is 25 or 28th. So next question do I have enough hydraulic fluid. I did run two hydraulic lines from back ports to front for a grapple bucket, I added on front. I did add some fluid and it shows full in sight glass when off and half full when running. The prob is I don't know what the norm how it is supposed to sound and don't want to damage anything. Thanks for the help I have been picking up tips from reading the other threads.