Craftsman 139.53985DM Manual Del Propietário página 15

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iNSTALLATiON
STEP
4
Position
the
Opener
Follow instructions which apply to your door type as
illustrated.
SECTIONAL
DOOR OR ONE-PIECE DOOR WITH
TRACK
A 2x4 laid flat is convenient for setting an ideal
door-to-rail distance.
• Raise the opener onto a stepladder. You will need
help at this point if the ladder is not tall enough.
• Open the door all the way and place a 2x4 laid flat on
the top section beneath the rail.
• If the top section or panel hits the trolley when you
raise the door, pull down on the trolley release arm
to disconnect inner and outer sections. Slide the outer
trolley toward the motor unit. The trolley can remain
disconnected
until Installation Step 12 is completed.
To prevent damage to garage door, rest garage door opener
rail on 2x4 placed on top section of door.
Rail
olley
Release
ENGAGED
RELEASED
ONE-PIECE
DOOR WITHOUT TRACK
A 2x4 on its side is convenient for setting an ideal
door-to-rail distance.
• Raise the opener onto a stepladder. You will need
help at this point if the ladder is not tall enough.
• Open the door all the way and place a 2x4 on its side
on the top section of the door beneath the rail.
• The top of the door should be level with the top of the
motor unit. Do not position the opener more than 4"
(10 cm) above this point.
Header
Bracket
2x4 is used to determine
the correct mounting height
from ceiling.
15
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