Illustration Of Sectional Door Installation - Craftsman 139.18847 Owner's Manual

SECTIONAL Door Installation
Before you begin, survey your garage area to see whether any of the conditions below apply to your installation.
Horizontal and vertical reinforcement
is needed for lightweight garage doors
(fiberglass, steel, aluminum, door with glass panels, etc.).
See page 24 for details.
Safety Reversing Sensor
Based on your particular requirements, there are
several installation steps which might call for
materials and/or hardware not included in the carton.
Header Cable Pulley
• Step 1, page 12 - Look at the wall or ceiling above
Bracket
the garage door. The header bracket must be
securely fastened to structural supports.
• Step 5, page 17 - Do you have a finished ceiling in
your garage? If so, a support bracket and
Garage
Door
additional fastening hardware may be required.
Spring
• Safety reversing sensor, page 21 - Depending
upon garage construction, wood blocks may need
to be fastened to mounting locations before
sensors are installed.
• Step 10, page 22 - Alternate floor mounting of the
Header
safety reversing sensor will require hardware not
Wall
Door Bracket
provided.
Garage
Door
• Step 11, page 24 - Do you have a steel, aluminum,
fiberglass or glass panel door? If so, horizontal
and vertical reinforcement is required.
• Look at the garage door where it meets the
floor. It must close on the floor all the way
across. Otherwise, the safety reverse system
may not work properly. See page 30. Floor or
door should be repaired.
Header Wall
Door Center
Floor must be level
across width of door
Closed Position
Bracket
Trolley
Rail Assembly
Cable
Emergency
Release
Rope & Handle
Straight
Door
Arm
Curved
Door
Arm
Horizontal and vertical reinforcement
is needed for lightweight garage doors
(fiberglass, steel, aluminum, door with glass panels, etc.).
See page 24 for details.
FINISHED CEILING
Support bracket &
fastening hardware
is required.
See page 17.
Slack in Chain Tension
is Normal When
Garage Door is Closed
Extension Spring
OR
Torsion Spring
Safety
Safety Reversing Sensor
Reversing
Sensor
Header
Bracket
Garage
Door
Spring
Cable
Header
Wall
Door Bracket
Garage
Door
• If your door is more than 7 feet high, see the rail
extension kits available on page 38. Garage
Door
• The opener can be installed within 2 feet to the left
or right of the door center if there is a torsion spring
or center bearing plate in the way of the header
bracket or door bracket area. If your door has
extension springs, the opener must be installed
in the center of the door. See pages 12 and 24.
• Do you have an access door in addition to the
garage door? If not, Model 18752 Outside
Trolley Release is required. See page 38.
4
Header Wall
Door Center
Access Door
Floor must be level
across width of door
Closed Position
Cable Pulley
Closed Position
Bracket
Trolley
Rail Assembly
Cable
Emergency
Release
Rope & Handle
Straight
Door
You may find it
Arm
helpful to refer
Open Position
back to this page
Curved
Door Trolley
T-rail
as you proceed
Arm
with the installation
of your opener.
Straight
Door
Arm
Curved
Door Arm
Slack in Chai
is Normal
Garage Door
E
Torsio
Safety
Reversin
Senso
Emergency
Release
Rope &
Handle