Rotary Pump Pressure Adjustment - 1st-line Equipment, LLC

Remove rear wrap-around body panel by removing the three screws on each side. When using a flathead screwdriver, use the index finger and thumb of one hand to keep the screwdriver steady on the screw head. This will avoid any slippage and scratches to the body.

Using 3/4″ open-ended wrench, remove the gold cover nut (shown being held between fingers).
After removing the cover nut, use a flat-headed screwdriver to adjust the now visible screw. Adjust inward for more, outward for less.