Preparing Your Garage Door; Tools Needed - Craftsman 139.53930DM Owner's Manual

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.
To prevent possible SERIOUSINJURYor DEATH:
• ALWAYScall a trained door systems technician if garage
door binds, sticks, or is out of balance. An unbalanced
garage door may NOT reverse when required.
• NEVERtry to loosen, move or adjust garage door, door
springs, cables, pulleys, brackets or their hardware, all of
which are under EXTREMEtension.
• Disable ALL locks and remove ALL ropes connected to
garage door BEFORE installing and operating garage door
opener to avoid entanglement.
To prevent damageto garage door and opener:
• ALWAYSdisable locks BEFORE installing and operating the
opener.
• ONLY operate garage door opener at 120V, 60 Hz to avoid
malfunction and damage.
Sectional Door
One-Piece Door
Tools needed
During assembly, installation and adjustment of the
opener, instructions will call for hand tools as illustrated
below.
Stepladder
Level (optional)
Tape Measure
Drill
Drill Bits
3/16", 5/16"
00 and 5/32"
UU A 1/2", 5/8", 7/16", 9/16"
and 1/4"
Pencil
Wire Cutters
Hack Saw
Claw Hammer
Screwdriver
o3
End Wrench