Work one end of the ring out and very gradually and carefully push it back and up very slightly as you work your way around until it comes off. Reverse the procedure to install. Same deal with the Dykes. Bear in mind that the ring land is an important part of the seal and if ideally the piston should be replace along with the ring. Less than ideally you might be OK without it if the land is in good condition. I think the end gap should run around .001" Pretty hard to measure it in place.