Outer Limits 4x4 Board

Ok, Just getting the truck ready and checking everything over. Just hooked up a sweet power steer cooler for it. I've always had a few drama's with the steering. I have Hydro assist as well. Now on the spot turning - turning left is ok, but when I turn right the belt starts to slip on the pump and squeal. The belt is tight and has heaps of fluid in pump. Even if I rev it up it still hesatates (spelling) to turn. Also running a ford pump.

Any Ideas people??

Maybe one for the 1madengineer ????