Craftsman 139.53992 User's Manual | Page 3

Craftsman Garage Door Opener User's Manual - 139.53992.
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3

Pliers

Wire Cutters

Claw Hammer

Hack Saw

Screwdriver

1/2", 5/8", 7/16", 9/16"
& 1/4" Sockets and Wrench

Drill

Tape Measure

2

1

Stepladder

Pencil

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

Carpenter's
Level

Box Wrench 1/2 x 7/16"

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.

WARNING

CAUTION

WARNING

WARNING

WARNING

CAUTION

WARNING

WARNING

Sectional Door

One-Piece Door

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