N7544

Thanks for writing in. This looks like it might be something like our 23-155. If so, you'll need to remove the floor guide first. Swing the door out, then lift it up and pull the rollers out of the track. Remove the old bracket and then install the new roller. Re-hang the door and check for proper adjustment. If adjustment is needed, remove set screw and loosen the screws in the slotted holes to move the door position. Then tighten and install the set screw. Let us know if you have any other questions.