Safety Information, Precautions, Tools; Testing Your Garage Door For Binding & Balance - Chamberlain Security+ 4640 Owner's Manual

Safety Information, Precautions, Tools

WARNING
An unbalanced garage door might not reverse when
required and someone under the door could be seriously
injured or killed.
If your garage door binds, sticks or is out of balance, call
for professional garage door service. Garage doors, door
springs, cables, pulleys, brackets, and their hardware are
under extreme tension and can cause serious injury or
death. Do not try to loosen, move or adjust them
yourself!
Ropes left on a garage door could cause someone to
become entangled and killed. Remove all ropes
connected to the door before installing and operating the
opener.
Identify the type and height of your door, any special
conditions that exist, and any additional materials that
may be required. Refer to pages 6 and 7.
Test Your Door for Balance
Before you begin, complete the following test to make
sure your door is balanced, and is not sticking or
binding:
• Lift the door about halfway as shown. Release the door.
It should stay in place, supported entirely by its springs.
• Raise and lower the door to see if there is any binding
or sticking.
During assembly, installation and adjustment of the opener, instructions will call for tools shown below.
Stepladder
Carpenter's
Level
Tape Measure
Drill
1/2" & 7/16" Sockets
and Wrench
To avoid damage to the garage door and opener, disable
locks before installing and operating the opener. Use a
wood screw or nail to hold locks in the "open" (unlocked)
position.
Operation at other than 120V 60 Hz will cause opener
malfunction and damage.
Sectional Door
Pencil
Wire Cutters
3/16", 5/16" and
5/32" Drill Bits Pliers
Screwdriver
3
CAUTION CAUTION
One-Piece Door
Hack Saw
Claw Hammer
1/2" x 7/16" Box Wrench