[TAKPAK]

Hydraulics are also not absolutely perfectly sealed. In time, a ram will settle, just from leakage past the main seal on the piston inside. Ask any hydraulic service person about that. While it might take days or even weeks, eventually the rams will settle, and then the trailer will need re-leveling. All hydraulic service people will also advise to cycle rams once in a while to keep a coating of oil in the inside parts as well, so you don't get a "stuck" situation. Just like a car engine piston, if left in one place long enough, it will get stuck there. It could take a long time, but it will happen.

By the way, welcome to the "thirty seven and a quarter" owners group. We're really enjoying ours. Already have done some mods. Just ask if you would like to know what.