And to add concerning the proper connection of the hoses I am attaching a link to an older post that shows proper hose connection on an M. The photo I am referring to is in 10th reply. I confirmed this with a photo I have of the one on my M, for me it is just easier to post the link than to resize the photo off my phone to post. So if installed as shown looking at the left side of the tractor the top hose is the pressure or supply hose. Also may help to know if you have a belt driven pump or if it is supplied by a priority valve off the live hydraulics? Which would be an option for your tractor, going by your forum handle as it being a Super MD.