Craftsman 139.18057 Owner's Manual

12One-piece doorwith horizontaltrackHeader WallCeilingTrackHighest Pointof TravelDoor2" (5 cm)Sectional doorwith curved trackDoorTrackHeader WallHighest Pointof Travel2" (5 cm)FinishedCeilingVerticalCenterlineHeaderWall 2x4 StructuralSupportsVerticalCenterlineINSTALLATION STEP 1Determine the Header BracketLocationInstallation procedures vary according to garage doortypes. Follow the instructions which apply to yourdoor.SECTIONAL DOOR AND ONE-PIECE DOORWITH TRACK1. Close the door and mark the inside verticalcenterline of the garage door.2. Extend the line onto the header wall above thedoor.You can fasten the header bracket within 4 feet(1.22 m) of the left or right of the door centeronly if a torsion spring or center bearing plateis in the way; or you can attach it to the ceiling(see page 14) when clearance is minimal. (Itmay be mounted on the wall upside down ifnecessary, to gain approximately 1/2" (1 cm).If you need to install the header bracket on a 2x4(on wall or ceiling), use lag screws (not provided)to securely fasten the 2x4 to structural supports asshown here and on page 13.3. Open your door to the highest point of travel asshown. Draw an intersecting horizontal line on theheader wall 2" (5 cm) above the high point. Thisheight will provide travel clearance for the top edgeof the door.NOTE: Door clearance brackets are available forsectional doors when headroom clearance is lessthan 2" (5 cm). See accessory page 39.Proceed to Step 2, page 14.To prevent possible SERIOUS INJURY or DEATH:• Header bracket MUST be RIGIDLY fastened tostructural support on header wall or ceiling, otherwisegarage door might not reverse when required. DO NOTinstall header bracket over drywall.• Concrete anchors MUST be used if mounting headerbracket or 2x4 into masonry.• NEVER try to loosen, move or adjust garage door,springs, cables, pulleys, brackets, or their hardware, allof which are under EXTREME tension.• ALWAYS call a trained door systems technician ifgarage door binds, sticks, or is out of balance. Anunbalanced garage door might not reverse whenrequired.WARNINGCAUTION WARNINGWARNING