I want to add a single hyd coupler to a MF50. I have seen a couple ways to do it. One is Stienler sells a kit and it is a 2 coupler kit. It is more than I need. I have also seen a hose coming out of the trans top going to a coupler. I have also read where you have to cahin the 3 point arms down if you do this, I have also seen a 50 that has a gate valve on that hose. Anyone have the real way to do this? All I need to do is hook a one way cly on a hay rake to it.

Mine has a seperate valve assembly that sets just in front of the seat but behind the gear shift.  Looks like it bolts right to the tractor.  I bought it this way so I am pretty sure it is a factory stup.