Replacing xring fx impact

I made one: http://ernestrowe.com/fx-impact ------> look in the "valve stem disassembly"



you have 2 remove the hex screw retainer on the valve tube, slide out the valve rod, remove x-ring---> you well need a long oring pick , clean sealing sealing surface, lube x-ring and install (http://www.oringsandmore.com/x-rings-2-9-x-1-78mm-price-for-20-pcs/) , clean rod and lube and install in the valve tube, install hex screw retainer tight, move rod in and out to insure the rod is sliding smoothly not binding, go to new oring testing before final reassembly: