Preparing Your Garage Door; Tools Needed - Chamberlain LiftMaster Security+ 1256R Owner's 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 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 SERIOUSINJURY OR 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.
• 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.
• ONLYoperate 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.
Stepladder
Level (Optional)
Tape Measure
Pencil
Wire Cutters
Drill 3/16", 5/16" and _,,_
5/32" Drill Bits
iers
ts Screwdriver
Hack Saw
Claw Hammer
Adjustable End Wrench