Craftsman 139.53920D - Manual (Page 12)

INSTALLATION STEP 1
Determine the Headier Bracket
Location
A
WARNING
To prevent possible SERIOUS INJURY or DEATH:
• Header bracket MUST be RIGIDLY fastened to
structural support on header wall or ceiling, otherwise
garage door might riot reverse when required. DO NOT
install header bracket over drywatl.
• Concrete anchors MUST be used if mounting header
bracket or 2x4 into masonry.
» NEVER try to loosen, move or adjust garage door,
springs, cables, putleys, brackets, or their hardware,
ail of which are under EXTREME tension,
• ALWAYS cal! a trained door systems tschniclan if
garage door binds, sticks, or is out of balance An
unbalanced garage door might not reverse when
required -
Instalfation procedures vary according to garage door
types Foltow 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
oniy 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 wail or ceiling), use lag screws (not provided)
to securely fasten the 2x4 to structurai supports as
shown here and on page 13,
3, Open your door to the highest point of travei 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.
if rtig
Header Wai
2" (S cm) Track
Highest Point
of Travel
-Door
Sectional door wilii curved track One-piece door with harizonlat track
One-piece door without track:
jamb hardware
One-piece door withoui track:
pivot hardware
12