Unfortunately they all seem to do that at some level--some worse than others. My 2210 leaked down a little and my 4110 leaks down a lot less; very slowly, but not while it is running. In transporting a VERY heavy load in the bucket more than a few hundred yards, driving very slowly, I can bump the curl DHCV function after a few minutes and the bucket will re-curl an inch or less. No drop in the laoder arms or on the 3PHthough.
I have an old Gravely 8183T rider with a hydraulic lift for the mower deck. Last winter I incidently left the mower deck hydraulics 'up' when I stored it for the fall. The deck was in the exact same position four months later. The machine was built 27 years ago and the hydraulics have never been so much as adjusted once. Go figure /forums/images/graemlins/confused.gif