Originally Posted by
aeromech3
Swash plate pump? higher demand higher angle of plate, more friction on slipper pads, case drain filter blockage, more flow generates more heat; excessive high system demand can lead to knock / vibration; jerky operation of hydraulic motors can exacerbate drive shaft wear and cause system lock out ( mainly flaps). Could cause priority valves, where fitted, to hammer leading to such items as extending gear extension time, longer unclean door configuration flight mode.
This is the kind of answer I was looking for Aeromech, so thanks. Looks like there's a whole lot more going on than just "pumping against the same or lower pressure."