Installation Section: Pages; Determine Header Bracket Location; Sectional Door - Craftsman 139.18076 Owner's Manual

1/2 hp garage door opener for residential use only
Table of Contents

Advertisement

Installation Step 1

Determine Header Bracket Location

Installation procedures vary according to
garage door types. Follow the instructions
which apply to your door.
SECTIONAL Door and
ONE-PIECE Door With Track
Header
Wall
• Open your door to the highest
point of travel as shown. Draw
an intersecting horizontal line
on the header wall 2" above
the high point. This height will
provide travel clearance for the
top edge of the door.
Door clearance brackets are
available for sectional doors
when headroom clearance is
less than 2". See accessory
page 38.
Proceed to Step 2, page 14.
Installation Section: Pages 12 – 27
Finished
Vertical
Ceiling
Guideline
2x4
Vertical
Guideline
Door

Sectional door

with curved track
If the header bracket is not rigidly fastened to
a structural support on the header wall or
ceiling, the safety reverse system may not
work properly (see page 30). The door might
not reverse when required, and could cause
serious injury or death.
The garage door springs, cables, pulleys,
brackets and their hardware are under extreme
tension. Do not attempt to loosen, move or
adjust them yourself. Serious personal injury
or death could result. Call for professional
garage door service.
• Close the door and mark the inside
Structural
Supports
vertical centerline of the garage door.
• Extend the line onto the header wall
above the door.
Remember, you can fasten the header
bracket within 4 feet 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
(refer to page 14) when clearance is
minimal. (It may be mounted on the
wall upside down if necessary, to gain
approximately 1/2".)
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.
Ceiling
Header
Wall
Track
2"
Highest Point
of Travel
12
WARNING
Header
Wall
2"
Highest Point
of Travel
Door
One-piece door
with horizontal track
Track

Hide quick links:

Advertisement

Table of Contents
loading

Table of Contents