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Safety Information and Precautions; Tools
WARNING
An unbalanced gara ge door might not re verse 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 injur y or
CAUTION
death. Do not tr y to loosen, mo ve or adjust them
yourself!
Ropes left on a gara ge door could cause someone to
become entangled and killed. Remove all r opes
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
The Chamberlain Group, Inc.
Testing Force Setting
New GDO Manual
2/1/92
Carpenter's
Level
Tape Measure
Drill
1/2" & 7/16" Sockets
and Wrench
WARNING
The Chamberlain Group, Inc.
Testing Force Setting
To avoid damage to the garage door and opener, disable
New GDO Manual
locks before installing and operating the opener. Use a
2/1/92
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
Pliers
5/32" Drill Bits
Screwdriver
3
CAUTION
WARNING
One-Piece Door
Hack Saw
Claw Hammer
1/2" x 7/16" Box Wrench
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