Craftsman 139.53930DM Owner's Manual page 12

INSTALLATION STEP 1
Determine the Header Bracket Location
To prevent possible SERIOUSINJURYor DEATH:
• Header bracket MUST be RIGIDLYfastened to structural
support on header wall or ceiling, otherwise garage door
might NOT reverse when required. DONOT 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 reverse when 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 centerline of
the garage door.
2. Extend the line onto the header wall above the door.
You can fasten the header bracket within 4 feet
(1.22 m) of the left or right of the door center only if
a torsion spring or 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 mounted on
the wall upside down 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:
• 2" (5 cm) above the high point for sectional door and
one-piece door with track.
• 8" (20 cm) above the 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 exceeds the height
available in your garage, use the maximum height
possible, or refer to page 13 for ceiling installation.
Unfinished
Ceiling
HeaderWall
Vertical Centerline
of Garage Door
Header Wall
15'--" Clll)
Tlaok
Highest Point
of Travel
--Door
Sectional door with curvedtrack
I_ Heal,_._Wall
ooor 2° ihest
I _
Point
€__Hard_are I of Travel
One-piece door without track:
jamb hardware
OPTIONAL
CEILING
MOUNT
FOR
HEADER
BRACKET
2x4 Structural
Supports
Y
HeaderWall Track
Hfig hest Point
Travel
T
One-piece door with horizontal track
Door
Header Wall
:- 8" (20 cm)
_---_:= =----_,
', Highest
,, Point
" of Travel
Pivot
One-piece door without track:
pivot hardware
12