How To Put A Sliding Glass Door Back On Track. Release the door and let it swing gently back to the vertical position. Raise the wheel by turning the adjustment screw counterclockwise.
First locate the adjustment screws along the bottom of the outside face of the door frame shown or on the doors inside edge. It helps to angle it and put the top of the door in first. Lift each of the wheels with a flat-head screwdriver while you push the door in.
It might be built into the threshold itself.
Completely open your sliding patio door. Insert the doors wheels into the double track inside the upper door jamb lifting it as far as it will go. First use a dry cloth to wipe down any dirt that has accumulated on them. Spray the tracks with an all-purpose cleanser and wipe gently with a cloth or paper towel.