LiftMaster 8500W Owners Manual - Page 9
Position and Mount the Garage Door Opener
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Installation 1 Position and Mount the Garage Door Opener NOTE: For additional mounting options refer to the accessories page. 1. Close the garage door completely. 2. Slide the garage door opener onto the end of the torsion bar. If the torsion bar is too long or damaged, you may need to cut the torsion bar. Ensure the collar does NOT touch the bearing. 3. Use a level to position and vertically align the garage door opener. Verify the mounting bracket is located on a solid surface such as wood, concrete or door/flag bracket. 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 wall. 5. Remove the garage door opener from torsion bar. Drill 3/16 inch pilot holes at the marked locations. Drill through metal door rail plates if necessary. 6. Slide the garage door opener back onto the torsion bar until pilot holes align with bracket. 7. Tighten the 2 square head set screws on the torsion bar. For a hollow torsion bar, tighten screws 3/4 - 1 full turn after making contact with the bar. For a solid shaft torsion bar, tighten screws 1/4 - no more than 1/2 turn after making contact with the shaft. If installing on a keyed torsion bar, DO NOT tighten the screws into the keyway. 8. Secure the mounting bracket to the wall and to the garage door opener. Use the 14‑10 x 2" screws to secure the mounting bracket to the wall. 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. HARDWARE Screw 14-10 x 2" (2) Shaft Collar .25" (.6 cm) min. space between bearing and shaft collar Bearing Plate Torsion Bar Set screws (Torsion bar) Mounting Bracket Screws 14-10 x 2" 9