Cross tip screwdriver Flat tip screwdriver Locking pliers Pressure Hose Gasket Visit pressureparts.com and locate the pressure hose gasket and any other Karcher electric pressure washer part(s) you need. Visit pressure-washer-parts.com, locate the part(s) you need, compare the final costs to you between the two pressure washer parts sites, and obtain your parts. Pull out the locking slide on the trigger gun. Disconnect the pressure washer hose from the trigger gun. Roll or pick from its recess the remaining deteriorated rubber gasket on the small end of the pressure washer hose. Roll the new rubber gasket onto the small end of the pressure washer hose. Trigger Gun Spring Remove the screw in the side of the gun that holds the two plastic outer parts of the gun together. Split the two plastic gun handle parts apart. Remove the closing screw from atop the trigger gun manifold. Remove the gasket beneath it, if it didn't come up with the closing screw. Pull the helical spring from the trigger gun manifold. Replace it with the new spring. Keep a close watch on how and in which order the trigger gun components come apart Even numbering them if that will help you keep them in order, so that you correctly put the trigger gun back together.