Sears 139.53975SRT1 Garage Door Opener User Manual


 
Preparing your garage door
Before you begin:
Disable locks.
Remove any ropes connected to garage door.
Complete the following test to make sure your
garage door is balanced and is not sticking or
binding:
1. Lift the door about halfway as shown. Release
the door. If balanced, it should stay in place
supported entirely by its springs.
2. Raise and lower the door to see if there is any
binding or sticking.
If your door binds, sticks, or is out of balance, call
a trained door systems technician.
To prevent possible SERIOUSINJURYOR DEATH:
ALWAYScall a trained door systems technician if
garagedoor binds, sticks, or is out of balance.An
unbalanced garagedoor may not reverse when
required.
NEVERtry to loosen, move or adjust garagedoor, door
springs, cables, pulleys, brackets or their hardware,all
of which are under EXTREMEtension.
DisableALL locks and remove ALL ropes connected to
garagedoor BEFOREinstalling and operating garage
door openerto avoid entanglement.
To prevent damageto garagedoor and opener:
ALWAYSdisablelocks BEFOREinstalling and operating
the opener.
ONLYoperategaragedoor opener at 120V, 60 Hzto
avoid malfunction and damage.
Sectional Door
One-Piece Door
Levei
Tools needed
During assembly, installation and adjustment of the
opener, instructions will call for hand tools as
illustrated below.
Stepladder
Tape Measure
Drill 3/1B", 5/16" and
5/32" Dritl Bits
Pencit
Wire Cutters
Locking pliers
Hack Saw
Screwdriver
O)
AdjustabJe End Wrench
3