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Craftsman 139.53990D User Manual

Craftsman 139.53990D
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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 atrained door systems technician if
garage door binds, sticks, or is out of balance.An
unbalancedgarage door may not reverse when
required.
NEVERtry to loosen, move or adjust garage door,door
springs, cables, pulleys, brackets or their hardware,all
of which are under EXTREMEtension.
Disable ALL locks and removeALL ropes connected to
garage door BEFOREinstalling and operating garage
door opener to avoid entanglement.
To prevent damageto garage door and opener:
ALWAYSdisable locks BEFOREinstalling and operating
the opener.
ONLYoperategaragedoor opener at 120V,60 Hzto
avoid malfunction and damage.
Sectional Door
One-Piece Door
Tools needed
During assembly, installation and adjustment of the
opener, instructions will call for hand tools as
illustrated below.
Stepladder
Level(optional)
Pencil
Tape Measure
Wire Cutters
Drill 3/16", 5/16"
N and 5/32"
0U
_A Sockets and Wrench
--U 1/2", 5/8", 7/16", 9/16"
and 1/4"
Hack Saw
Screwdriver
Adjustable End Wrench

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Craftsman 139.53990D Specifications

General IconGeneral
BrandCraftsman
Model139.53990D
CategoryGarage Door Opener
LanguageEnglish

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