I did a search but really didn't find much. Anyway, my 3 point arms on my 2520 have been in the up position for a little over 3 months! Today was the first time since then, that I was going to use the tractor and put my mower deck back on. They will not drop. I don't understand why they haven't even leaked down a little. Nothing attached, just the I-Match. The rate of drop valve seems fine. I opened and closed it numerous times. Rockshaft seems ok too. I don't have a water or moisture problem in my barn. It's nice and dry all the time. So does anyone have any suggestions before I end up having to get my dealer involved!