Craftsman 139.53674SRT - Manual (Page 4)

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 lor lightweiglil garage doors
(fiberglass, steel, aluminum, door with glass panels, etc.).
See page 24 for details.
Slack in Chain Tension
is Nonnal When
Garage Door is Closed
FINISHED CEILING
Support bracket &
fastening hardware
is required.
See page 17.
■ Safety Reversing Sensor
Based on your particular requirements, there are
several installation steps which might call for
materials amd/or hardware not included in the carton.
• Step 1, page 12 - Look at the wall or ceiling above
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
additional fastening hardware may be required.
• Safety reversing sensor, page 21 • Depending
upon garage construction, wood blocks may need
to be testened to mounting locations before
sensors are installed.
• Step 10. page 22 - Alternate 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 vertica] reinforcement is required.
• Look at the garage door where it meets the floor.
It must close on the floor all the way across.
Other-wise, the safety reverse system may not
work property. See page 30. Roor or door should
be repaired.
Closed Position
Cable Pifitey
Trolley
Cabte
Rail Assembly
• The opener can be installed within 2 feet of 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
exten^on springs, the open^-must be installed
in die
confer of the door. See pages 12 and 24.
• Do you have an access door in addition to the
garage door? If r>oL Model 53702 Emergency
1 ^ Release is required. See page 38. •
• If your door is more than 7 feet high, see the rail
extortion kits avaitabte on page 38.
You may find It helpful to refer badt to this page as you proceed with the installation of your opener.