Craftsman 139.53664SRT2 - Manual (Page 16)

Installation Step 4
Position the Opener
Follow instructions which apply to your door
type as illustrated.
A
CAUT10W
To prevent damage to steel, aluminum,
fiberglass or glass panel doors, do not rest the
opener on the door without using a 2x4.
SECHONAU Door A ONE-PIECE Door v^th Trook
A 2x4 iaid flat is convenient for setting an ideai
door-to-T-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 T-rail.
if the top pane! hits the trolley when you raise
the door, puH down on the trolley release arm to
disconnect the inner and outer sections. The
trolley can remain disconnected until Step 12 is
completed.
> With the door fully open and parallel to the floor,
measure the distance from the floor to the top of
the door.
' Using a stepladder as a support, raise the opener
to the same distance as the door from the floor (it
will be at a slight angle as shown).
» T h e top of the door should be level with the top of
the opener. Do not position the opener more than
2" above this point.
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