Water Pump Woes

I recently drained all of the water out of the fresh water tank to lighten the rpod up for towing into the mountains.  When I filled up the tank, the water pump no longer worked.  When I turn it on I can hear and feel it vibrating, but no water comes out.  I let it run for 30 minutes to make sure it wasn't just filling up the hot water tank, but no luck.  I am wondering if the pump might need to be primed or if it is just shot and in need of replacement.  When I got home today, I ran water into the city water connection and made sure everything worked and the hot water tank was full.  Still no luck when I turn off the hose.  Thanks for any advice you might have!

Its a self-priming pump, so nothing to do there.  Also, I can get cold water out of the tap while the water heater is filling (and air sputtering out of the hot).

Pretty sure the pump has a 2 year warranty from the manufacturer (shurflo).

But the things are near bomb proof, self priming and dry run capable. I will say that when I pulled out my filter the first time it was nearly completely full of plastic shavings..

It can' hurt a thing.. but I will point out no one has reported anything other than those plastic shavings, most assuredly left over from the build.. once they are out..