Important! Lube the cylinder bore and new piston with oil.
Install the oil ring first (3parts)
Carefully stretch and install the rings from the top.
Note: rings are made of hard metal, but are brittle and will snap so put one end in a grove and work them around into the gap.
After the oil ring is assembled in its grove install the Ring marked "RN", followed by the "R" ring in the top groove. Make sure the markings are facing up, they should look like this when complete.
Make sure he gap in the rings are not lined up or there will be blowby.