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An earlier post on this forum on the same topic.
"Changing from a purely (engine driven pump) hydraulic to an electric driven pump will reduce the power demand by around 80% according to Reimpell , Stoll and Betzler in The Automotive Chassis , p286 in Edition 2.
Power requirements are around 80 amps at full demand , like parking lots for instance , but reduce to the 15 / 20 amps range for suburban driving.
Operating pressures are around 120 bar (1800 psi approx)
Many automotive suppliers (ZF , SKF etc) supply these as complete sub assemblies to car builders so perhaps this may be a good place to begin your search.
Good luck , Pete."
HTH , Peter.
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