That old live pump is almost certainly a "fixed displacement pump", meaning it has to be operated "open center". Closed-center pumps are "variable displacement", and cut back on flow when function oil is not being used.
If the torque generator has been previously used on an old tractor it is almost certainly "open center", as well.
(Nowadays, similar-looking torque generators can be purchased in "closed center" configuration, as well... is a model # visible on the unit?)
You need a relief valve ahead of the torque generator, "cuz when the steering reaches it"s right or left limit and somebody holds the wheel against the limit it HAS to bypass back to the sump, and LIKELY a "fixed flow divider" ahead of it to divert a fixed GPH to the torque generator regardless of engine RPM"s and dump the rest "to sump", or another hydraulic function. Some flow dividers have a relief built in.
What I have posted is generic information, applicable to MANY old tractors.
For Farmall-specific information, slide on down a few Forums to the "Farmall Forum", and likely the gurus there will give you more exact information and maybe even a diagram.
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