"You" wrote in message
...
one would "Think" that any smart Hydrolic Engineer would have designed
a Steering System that used a single pump, running all the time, and
do the "Steering" by using a Vickers type "Solenoid Shuttle Valve" to
supply the Port & Starboard Hydrolic Oil Movement Control. No big
voltages except the Motor Contactor, which is (On/Off), and the Solenoid
Shuttle Valve Coils draw only a couple of amps at 12/24/32 VDc. Easily
switched with SemiConductors.

Right. And what would the constant unnecessary current draw of the pump be?
It would drain your battery in no time.

Meindert