Sure, they work just fine, assuming you get the rotation right. We
had a home brew EDM for years, P/S pump circulated hyd fluid. It was
run by a 1/3 hp motor. (But, it only needed to move a cyl with a few
pounds load.) So, as to hp, it depends on the load, not the pump.

What are your flow and pressure requirements?
Dave

On Dec 16, 7:23 pm, "jusme" wrote:
Can't an hydraulic steering pump be used as an oil pump by putting a motor
on the shaft?

I wonder what the flow rates are on regular power steering pumps and what
h.p. is needed to drive them.

j/b