No relief valve... that's probably why the 9amp current rating, that's when the oil flow stops & circles around the gears, producing the 20bar maximum.
Not difficult to make a prv or Fumotec/Vario have a nice tiny one already to go.
Gears are quite thick & tall, much like the Jung, the pump could very well be in the 1L class, depending on the rpm of the motor.
What's the servo make & model that's in there now?
I look forward to your experiment findings Ed & Tyler.
