If it slides on the outside of the fixed pannel, you should be able to simply lift it out.
If it is on the inside of the fixed pannel. Remove the screen door. There should be some screws that hold the fixed pannel in. Usually next to the wall. Take them out. Sometimes there is a stop that fits into the track between the fixed pannel and the jamb. Pry it out with a screwdriver. Remove fixed pannel. Then the sliding door should come out by lifting it up and pulling it outside. You might try taking off the sides of the sliding door. Many times the rollers will come out of the bottom rail after the sides are off. If door made before 1965 it may not have tempered glass. Be careful. Also there are over 100 types of rollers. Go to a glass shop and have them order new ones from a company called CRL. Every glass shop in the USA knows who they are. The problem with buying rollers from Home Club/Home Depot type places is closet door rollers and glass door rollers look alike in a catalog. They buy the cheapest ones.