LiftMaster 8360WLB Owners Manual - Page 11

Assembly 1 Attach the Rail to the Garage Door Opener Models 8360W, 8360WL, 8360WLB, 8365W, and 8365W-267 To avoid possible SERIOUS INJURY to finger from moving garage door opener: l ALWAYS keep hand clear of sprocket while operating opener. l Securely attach sprocket cover BEFORE operating. 2 Tighten the Chain 1. Loosen the inner nut and lock washer on the trolley threaded shaft. 2. Tighten the outer nut until the chain is a 1/2" above the base of the rail at the midpoint of the rail. 3. Re-tighten the inner nut. Slack in the chain is normal when the door is closed. No readjustment is necessary. To avoid SERIOUS damage to garage door opener, use ONLY those bolts/fasteners mounted in the top of the opener. NOTE: ONLY use the bolts removed from the garage door opener. Place the garage door opener on the packing material to prevent scratching. 1. Remove the two bolts from the top of the garage door opener. 2. Align the rail and the styrofoam over the sprocket. Cut the tape from the rail, chain, and styrofoam. 3. Fasten the rail with the previously removed bolts. 4. Position the chain around the garage door opener sprocket. 5. Install the sprocket cover by squeezing the sides and inserting the tabs into the slots on the garage door opener. Washered Bolt 5/16"-18 x 1/2" (Mounted in the garage door opener) Washered Bolt 5/16"-18 x 1/2" (Mounted in the garage door opener) 1/2" (13 mm) Models 8360W, 8360WL, and 8360WLB Models 8365W and 8365WL-267 11