Craftsman 139.53920D 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 nat 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 ifthere is any
binding or sticking
If your door binds, sticks, or is out of balance, calf a
trained door systems technician
TopreventpossibleSERIOUSINJURYor DEATH:
. ALWAYScalla traineddoorsystemstechnicianif
garagedoor binds,sticks, or is out of balance An
unbalancedgaragedoor may not reversewhen
required
NEVERtry to loosen moveor adjust garagedoor door
springs,cables,pulleys bracketsor their hardwareall
of whichare underEXTREMEtension
DisableALL locksand removeALL ropesconnectedto
garagedoor BEFOREinstalling andoperatinggarage
door openerto avoidentanglement
Topreventdamageto garagedoor andopener:
ALWAYSdisablelocks BEFOREinstallingand operating
the opener
ONLYoperategaragedoor openerat 120V,60 Hzto
avoidmalfunctionanddamage
Sectional Door
One-Piece Door
Tools needed
During assembly, installationand adjustment of the
opener, instructions will call for hand tools as
iE]ustratedbelow
Slepladder
PenciI
Wire Cullers
Hack Sew
Screwdriver
Adjustable End Wrench