You'll Need Tools; Safety Information; Testing Your Garage Door For Sticking, Binding And Balance - Chamberlain CSO Owner's Manual

Commercial strength operator
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During assembly, installation and adjustment of the opener, instructions will call for hand tools shown below.
Stepladder
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.
This product is for use on sectional garage
doors only. Serious personal injury could
result from the use of this product on
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

You'll Need Tools

Carpenter's
Level
Tape Measure
Drill
3/16", 5/16" and
1/2" and 7/16" Sockets
and Wrench
Pencil
Wire Cutters
Pliers
5/32" Drill Bits
Screwdriver
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.
Identify the type and height of your door, any special
conditions that exist, and any additional materials that
may be required by referring to the list on page 4.
3
Hack Saw
Claw Hammer
Adjustable End Wrench
CAUTION
CAUTION

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This manual is also suitable for:

Cso-1/2hp

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