Power Steering Question

[40 Chev]

I've adapted a Ford truck power steering box to an old tractor and now want to hook up the hydraulic lines, but I have to know what the line pressure is on a mid 80's Ford F250 power steering pump. I want to use the tractors hydraulic pump with an in line regulator. Any help is always appreciated.

[enjenjo]

Minimum will be 900 psi, maximum 1500 psi. The boxes are not real picky, as long as you have the minimum they will work fine.