farmall power steering and live pump

I have a live pump for a farmall h-450 and I want to do nothing but run power steering off of it and I wanted to know is the pump open center or closed? and is the torque generator run off an open or closed system? and do I need to run a valve body of any sort? and if I just run the output of the pump to the input of the torque generator will I blow the thing up? or will it just work?

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.
Farmalls

First of all, you don't have a pump for a "farmallh-450". You have one or the other because the 300-350 pump and the SM-400-450 pump are different size, different GPM, and most importantly a different bolt pattern.

Bob gave you some good advice, but one more point I don't think he mentioned was a reservoir. Probably 2 gallon MINIMUM.

What tractor are you working on? If it is an M (and maybe an H also) you need the late timing cover and front engine plate to mount the pump. Don't ask me how I know this.

It would be good for the pump if you at least ran a priority valve to divert only enough oil to run the power steering. The other output from the priority valve can just dump back into the reservoir.

What may be simpler and much cheaper is using a belt-driven power steering pump with its own reservoir.