Craftsman 139.3043 Garage Door Opener User Manual


 
Preparingyourgarage door
Beforeyou begin:
Disablelocks.
Removeany ropes connectedto garage door.
Completethe followingtest to make sure your garage door is
balancedand is not sticking or binding:
1. Lift the door about halfway asshown. Releasethe door. If
balanced,it should stay in place,supported entirely by its
springs.
2. Raiseand lower the door to seeif 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 garage
door binds, sticks, or is out of balance.An unbalanced
garagedoor may NOTreversewhen 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 removeALL ropes connectedto
garagedoor BEFOREinstalling and operating garagedoor
opener to avoid entanglement.
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Sectional Door
To prevent damageto garage door and opener:
ALWAYSdisable locks BEFOREinstalling and operatingthe
opener.
ONLYoperate garagedoor opener at 120V, 60 Hzto avoid
malfunction and damage.
One-Piece Door
Tools needed
During assembly, installation and adjustment of the opener,
instructions will call for handtools as illustrated below.
Stepladder
(optional) _ Pencil
TapeMeasure HackSaw
_I( Wire Cutters
Drill Drill Bits 3/16"
5/16", and 5/32" Screwdriver
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8 8 _sC"_et/__ dW;e,nc_dll2/i '' Adjustable End Wrench