I have a 641. The 3-pt has never actually worked in the draft control position which hasn't been an issue since i just use it with a box blade and mower. It will not go up at all in the draft control position. However, just recently i hooked up my post hole digger and when i raised it all the way up the upper link with the draft control spring engaged and would not release (moved in towards the tractor). After that it would not lower at all, it sounded like it had a heavy load on it. I moved the selector from touch control to draft control and it made no difference it would not go down. About 15 minutes after i turned the tractor off it would just drop smoothly on its own. I did this several times with the same result. I have used this post hole digger many times before without this issue. As long as i don't raise it to high there is no issue, however I have to raise it all the way up to use the post hole digger. All fluids are good.