I have an old Borg-Warner gear-type hydraulic pump. The only number I can find on it is P24AH21R01. Can anyone give me a clue as to how many GPM this pump should produce turning 1725 RPM and what HP motor I should use for maximum operating pressure of 2500 PSI?

In case of no identification, have a look at the attached file that will
instruct you how to calculate the flow.
Horse Power (metric units)= Preuure ((bar) x Q (Lit/Min) / 450 x (~0,85)
~0,85 = Assumed Total Efficiency

Gear-HP.pdf (148 KB, 73 downloads)