Re: Ford 8630 powershift steering problem
Generally, on hydrostatic steering systems, the most common problem, the easiest item to check and fix is the steering cylinder(s). The cylinder packing wears or blows out causing oil to leak by as you turn the wheel.
So, do the wheels attempt to move? Can you jack the front wheels off of the ground and if so, do they turn then?
If they still don't turn, then the pump is the next item suspect.
Does the wheel turn as though it has power assist?
The pump driven gear might have come loose or sheared the key.