The drum support rollers are usually in the same spot on every dryer, no matter the brand. They will be below the drum. In order to remove the rollers, you need to open the dryer's cabinet and remove the drum. Perhaps you will notice that the left roller is more worn out than the right one. This is a common occurrence, but you need to replace both at the same time. Be sure to remove the nut before you remove the roller. Don't use more than one drop of oil on the hub as too much oil will aid the accumulation of dust and lint, which harm the rollers. Replace the drum, reassemble the cabinet, and restore power.