Any way to "de-power" a power steering box?

I find that tough to believe. One reason "the belt off" makes them so hard to steer is the gearbox sort of has to push the fluid around. If you drained the fluid, it would be easier. But there is GOING to be more play in the steering, because now you are moving the control valve.

Now, I admit, this was a GM box, but I well remember "one weekend" ruining the belt in my old Landcruiser. That thing was a ***** to steer, and I was young and in shape, back then.