Take off the right hand side grip pannel and remove the solenoid wiring plug and the eye wiring plug and best remove the hose out of the bottom line.
undo the 2 screws that hold the frame on then side it down and watch the wires don't get jammed
you'll see the grub screw in the triiger with the frame off just loosen it off and push the pin out and pull the trigger down over and to the front to remove it then reassemble but watch you don't over tighten the rear grip pannel screws or you could put a hole in the solenoid.