Locate pump
Locate adjustment screw on the right side of brass pump housing
Loosen black lock nut with wrench
Adjust to 10 bar with a blind portafilter in the grouphead by using a flathead screwdriver
-Clockwise to raise pressure
-Counterclockwise to lower pressure
Re tighten lock nut
Verify pressure by actuating the grouphead to full brew with a blind portafilter inserted