Yes, flow simulation can do flow paths and measure pressure but it is limited in modeling pump behavior such as moving bodies. Generally pumps are simplified into flow rates only. You can show the effect through a non-moving assembly just fine, and calculate the head loss.
if you are talking about your gear pump, no
but a normal pump, yes, you can do that with flow, there is a tutorial that describes the process and if you look on the forum you'll find a wealth of discussions about it.