Preparing Your Garage Door - Craftsman 139.53902D Owner's Manual

Preparing your garage door
Before you begin:
• Disable locks.
• Removeany ropes connected to garage door.
• Completethe following test to make sure your garage
door is balancedand 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 SERIOUSINJURYor DEATH:
• ALWAYScall 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.
• DisableALL locks and remove ALL ropes connected to
garage door BEFORE installing and operating garage door
opener to avoid entanglement.
To prevent damageto garage door and opener:
• ALWAYSdisable locks BEFORE installing and operating the
opener.
• ONLYoperate garage door opener at 120V, 60 Hz to avoid
malfunction and damage.
SectionaJ Door
One-Piece Door
Too/s needed
During assembly, installation and adjustment of the opener,
instructions will call for hand tools as illustrated below.
Level (Optional)
Tape Measure
Pencil
Wire Cutters
Hack Saw
Stepladder
Drill
3/16", 5/16" and
5/32" Drill Bits
Screwdriver
Claw Hammer
Adjustable EndWrench