Pump stalling issues

Equipment doesn't work? Troubleshooting? If you're handy, members can help.

#1: Post by jsvenus »

Hi, the vibration pump of my Bezzera Mitica has been acting weird. Initially, the pump stops once it reaches 8 bar pressure. I tried adjusting the pressure as I wanted it to reach at least 9 bar but nothing was happening when I turn the screw. Now the pump stalls when there is a load at 8 bar then pressure drops. I pull lever down to pre infusion, pull it back up, pump runs again and then it stalls again at 8 bar. Does anyone have an idea what could be the problem? Wondering if my pump is dirty. I descaled not too long ago and a lot of muck came out

Team HB

#2: Post by JRising »

Replace the pump if it's too weak to keep water moving against the OPV pressure you desire.

jsvenus (original poster)

#3: Post by jsvenus (original poster) »

Actually the pump stops, you do not feel the vibration... is that a sign of a defective pump already? Or some other problem? Just want to make sure of diagnosis

Team HB

#4: Post by ira »

The pump stops making noise either because it's not getting power any more or because it's reached max pressure with almost no flow and the piston is sitting all the way retracted.