Position The Opener - Craftsman 139.18687 Owner's Manual

Installation Step 4

Position the Opener

Follow instructions which apply to your door
type as illustrated.
A 2x4 laid flat is convenient for setting an ideal
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.
NOTE: If the top panel hits the trolley when you
raise the door, pull down on the trolley release arm
to disconnect the inner and outer sections. The
trolley can remain disconnected until Step 12 is
completed.
Trolley
Trolley
Release arm
• 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 this height (it will be at a slight angle as shown).
• The top of the door should be level with the top of
the opener. Do not position the opener more than
2" above this point.
SECTIONAL Door & ONE-PIECE Door with Track
ONE-PIECE Door without Track
To prevent damage to steel, aluminum,
fiberglass or glass panel doors, do not rest the
opener on the door without using a 2x4.
Outer Trolley
Door
16
CAUTION CAUTION
Inner Trolley
2x4