Illustrationof Sectional Door Installation - Craftsman 139.53978SRT Owner's Manual

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,
Header Wall
FINISHED CEILING
Support bracket &
fastening hardware
is required.
See page 17.
Extension
Spdng
Access Door
OR
Spdng
safety
Reversing
Ser_sor
O
Floor must be level
Sensor across width of door,
Based on your particular requirements, there are
several installation steps which might call for
materials and/or hardware not included in the carton.
• Step 1, page 12 - Look at the wall or ceiling above
the garage door. The header bracket mustbe
securely fastened to structural supports.
• Step 5, page 17 - Do you have a finished ceiling in
your garage? If so, a support bracket and
additional fastening hardware may be required.
• Safety reversing sensor, page 21 - Depending
upon garage construction, extension brackets (see
Accessories page 38) or wood blocks may be
needed to fasten sensors to mounting locations.
• Step 10, page 22 - Floor mounting of the safety
reversing sensor will require hardware not
provided.
• 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
Garage
Door -
Header
Closed Position
Bracket
/ Trolley
Stop Bolt Trolley
_u_r J_ Enl_'l_YRed_ ase
J- _ Door
\ Arm
Door
Bracket
• The opener can be installed within 4 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 doo_ If not, Model 53702 Emergency Key
Release is required. See page 38.
• If your door is more than 7 feet high, see the rail
extension kits listed on page 38.
You may find it helpful to refer back to this page as you proceed with the installation of your opener.