Chamberlain RJO20 RJO20 Owner s Manual - English - Page 10

Installation (continued) 2 Position and Mount the Garage Door Opener 1. Close the garage door completely. 
 2. Slide the garage door opener onto the end of the torsion bar. 
Ensure the collar does NOT touch the bearing plate. 3. Use a level to align the garage door opener parallel to the door. Verify the mounting bracket installation wall is a solid surface, such as wood, concrete or a door/flag bracket. IMPORTANT: If installing on drywall, the mounting bracket MUST be attached to a stud. 
 4. When the garage door opener is properly aligned, mark the mounting bracket holes. If necessary, tighten collar screws on the torsion bar to hold garage door opener in place while marking holes. NOTE: The garage door opener does not have to be flush to the wall. Collar Opener MUST be parallel to door .25" min. space between bearing and collar Bearing Plate Torsion Bar To prevent possible SERIOUS INJURY or DEATH: • Concrete anchors MUST be used if mounting bracket into masonry. • NEVER try to loosen, move or adjust garage door, springs, cables, pulleys, brackets or their hardware, ALL of which are under EXTREME tension. • ALWAYS call a trained door systems technician if garage door binds, sticks or is out of balance. An unbalanced garage door might NOT reverse when required. • Garage door opener MUST be mounted at a right angle to the torsion bar to avoid premature wear on the collar. YOU WILL NEED Screw 14-10x2" (2) Mounting Bracket 10