Preparing Your Garage Door; Tools Needed - Chamberlain LiftMaster PROFESSIONAL ATS 211X 1/2 HP Mode D'emploi

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.
Sectional Door
Stepladder
Carpenter's
Level (Optional)
Tape Measure
Drill
3/16", 5/16" and
5/32" Drill Bits
1/2" and 7/16" Sockets
and Wrench
WARNING
To prevent possible SERIOUS INJURY OR DEATH:
• ALWAYS call a trained door systems technician if
CAUTION
garage door binds, sticks, or is out of balance. An
unbalanced garage door may not reverse when
required.
• NEVER try to loosen, move or adjust garage door, door
springs, cables, pulleys, brackets or their hardware, all
of which are under EXTREME tension.
• Disable ALL locks and remove ALL ropes connected to
garage door BEFORE installing and operating garage
door opener to avoid entanglement.
• This product is for use on sectional garage doors only.
SERIOUS INJURY could result from the use of this
WARNING
product on one piece garage doors.
CAUTION
To prevent damage to garage door and opener:
• ALWAYS disable locks BEFORE installing and operating
the opener.
• ONLY operate garage door opener at 120V, 60 Hz to
avoid malfunction and damage.

Tools needed

During assembly, installation and adjustment of the
opener, instructions will call for hand tools as
illustrated below.
Pencil
Wire Cutters
Pliers
Screwdriver
3
Hack Saw
Claw Hammer
Adjustable End Wrench