Craftsman 139.53920D - Manual (Page 3)

PFeparmg your garage door
Before you begin:
• Disable iocks.
• Remove any ropes connected to garage door,
• Complete the following test to make sure your
garage door is baianced 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 iower 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
A WARNING
To preveni posabls SERIOUS INJURY or DEATH:
• ALWAYS cal! 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 ECTREME tension
• Disable ALL locks and remove ALL ropes connected to
garage door BEFORE installing and operating garage
door opener to avoid entarigiement
CAUTION
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
Tools needed
During assembly, instaliation and adjustment of the
opener, instructions wili calf for hand tools as
iliustrated below.