[pugs]

Not sure how small it could be found in, but need a pressure switch that opens at your max pressure and a timer relay that is run by that switch which would set the delay for how long before the pump shut off. Might also be good with a small hyd accumulator to keep the pump from constantly turning on and off.

Or a small circuit board that would sense applied voltage to any of the spool valve servos and activate a timer relay to run the pump with a dwell to account for small pauses between movements.

Easiest would be a way to program the remote to turn the pump on when needed and delay turning it off for a few seconds after movement has stopped.