Craftsman 139.53939D Manual Del Propietário página 3

Preparingyour 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. Releasethe 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 SERIOUSINJURY or DEATH:
• ALWAYS call a trained door systems technician if garage
door binds, sticks, or is out of balance. An unbalanced
garage 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 remove ALL ropes connected to
garage door BEFORE installing and operating garage door
opener to avoid entanglement.
To prevent damage to garage door and opener:
• ALWAYSdisable locks BEFORE installing and operating the
opener.
• ONLY operate garage door opener at 120V, 60 Hz to 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.
Drill
Tape Measure
Pencil
Drill Wire Cutters
3/16", 5/16"
and 5/32"
Hack Saw
Screwdriver
Stepladder
and 1/4"
Pliers
Adjustable End Wrench