MMM hydraulic problem

[Anonymous Poster]

Hi all. I recently purchased a Cub Cadet 7275 (1995) with FEL and 72 in. MMM. The tractor has about 590 hrs. on it and is in reasonably good condition. I am having a problem with the MMM though. If I raise it up to full height, it drops back down in about 15 minutes to its lowest point. Also, the relief valve (I think) screams the whole time I'm raising it. Problem is, the screaming seems to come from the loader joystick area, and the service manual doesn't say anything about a relief valve here. The front end loader and 3pt stay up fine, and don't cause a screaming relief valve. Any thoughts before I attempt to fix the problem. Thanks in advance!!