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Preparing your garage door, Tools needed – Chamberlain 3575S User Manual

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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.

To prevent possible SERIOUS INJURY or DEATH:
• ALWAYS call a trained door systems technician if 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.

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.

Tools needed

During assembly, installation and adjustment of the
opener, instructions will call for hand tools as illustrated
below.

Pliers

Wire Cutters

Claw Hammer

Hack Saw

Screwdriver

Adjustable End Wrench

1/2" and 3/8" Sockets
and Wrench

Drill

Tape Measure

2

1

Stepladder

Pencil

3/16", 5/16" and
5/32" Drill Bits

Carpenter's
Level (Optional)

Sectional Door

One-Piece Door