Step 4 · Adjust the Pressure Screw
With the locknut loose, you can now adjust the pressure. Use a flathead screwdriver to turn the adjustment screw. To DECREASE the pressure (as per our assumed goal), turn the screw COUNTER-CLOCKWISE. To INCREASE the pressure, you would turn it CLOCKWISE. Make only a small adjustment, such as a one-quarter to one-half turn, at a time. This prevents drastic changes and allows for fine-tuning.