Turn your chair upside down to remove the legs. Twist each leg as if you were opening a jar and set them to the side. Usually there are no special tools needed to remove chair legs.
Cut a piece of plywood to cover the bottom of the chair. This gives the glider assembly something to attach to. If your chair already has a solid bottom, you do not have to add additional wood. Attach the plywood to the chair bottom with wood screws.
Center the glider mechanism on the plywood. This is usually a single unit that attaches with screws. Mark the holes for attaching the glider to the chair. Drill pilot holes at the marks. Pilot holes make it easier to insert the screws later. Replace the glider mechanism and attach with screws into the pilot holes.
Turn the chair upright and test.