Determine The Headerbracketlocation - Craftsman 139.53902D Manual Del Propietário

iNSTALLATiON STEP 1
Determine the HeaderBracketLocation
To prevent possible SERIOUSINJURYor DEATH:
• Headerbracket MUST be RIGIDLY fastened to structural
support on header wall or ceiling, otherwise garage door
might NOT reverse when required. DO NOT install header
bracket over drywall.
• Concrete anchors MUST be used if mounting header bracket
or 2x4 into masonry.
• NEVERtry to loosen, move or adjust garage door, springs,
cables, pulleys, brackets, or their hardware, ALL of which
are under EXTREME tension.
• ALWAYScall a trained door systems technician if garage
door binds, sticks, or is out of balance.An unbalanced
garage door might NOT reversewhen required.
Installation procedures vary according to garage door types.
Follow the instructions which apply to your door.
1. Close the door and mark the inside vertical centefline of the
garage door.
2. Extend the line onto the header wall above the door.
You can fasten the header bracket within 4' (1.22 m) of the
left or right of the door center only if a torsionspringor
center bearing plate is in the way; or you can attach it to the
ceiling (see page 13) when clearance is minimal. (it may be
mountedon the wail upsidedown if necessary,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 as shown here and on page 13.
3. Open your door to the highest point of travel as shown. Draw
an intersecting horizontal line on the header wall above the
high point:
• 3" (7.5 cm) above the high point for sectional door and
one-piece door with track.
• 8" (20 cm) abovethe high point for one-piece door without
track.
This height will provide travel clearance for the top edge of the
door.
NOTE:If the total number of inches exceedsthe height available
in your garage, use the maximum height possible, or refer to
page 13 for ceiling installation.
HeaderWall
Unf!nished
Ceiling _ BRACKETHEADERFORMOuNTCE
Vertical Centerline
of Garage Door
2x4 Structural
Supports
Header Wall
(7.5 cm)
Highest Point
of Travel
Sectional door with curvedtrack
Y
Header Wall
_====_ ,,
/Track
// Highest Point
Y of Travel
0he-piece door with horizontaltrack
Wall
Door 2° ihest
I _ Point
_Hardware i of Travel
0no-piece deer without track:
jamb hardware
Door
Header Wall
',- 8" (20 cm)
,;- Highest
Point
of Travel
Pivot
0no-piece doer without track:
pivot hardware
12