I assume you have a joystick or a two spool valve plumbed into the hydraulic pump for the loader. Look by the quadrant (rear lift handle) for a block off plate. IH has an open center system and this plate has bypass ports to circulate fluid (I think).
Here is my system after I re-worked the hydraulic valves.
This is with the quadrant cover removed and fender off, see the plate with a bulge, this is the bypass plate.
This is with the quadrant cover installed.
This is the rear remote ports. I got a pair of Safeway's at a local dealer. These people have the breakaway bracket, http://www.dultmeier.com/manufacturers/pioneer-coupling.asp
Good luck and post a pic of your setup, we can help. If the 484 uses the same valves, I have two valves and a end plate available with new o-rings.
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