Position The Opener - Craftsman 139.54985 Owner's Manual

INSTALLATION STEP 4
Position the Opener
Follow instructions which apply to your door type as illustrated.
SECTIONALDOOROR ONE-PIECE DOORWITH TRACK
A 2x4 laid flat is convenient for setting an ideal door-to-rail
distance.
1. Raise the opener onto a stepladder. You will need help at this
point if the ladder is not tall enough.
2. Open the door all the way and place a 2x4 laid flat on the top
section beneath the rail.
3. If the top section or panel hits the trolley when you raisethe
door, pull down on the trolley releasearm 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 damageto garage door, rest garage door opener rail
on 2x4 placed on top section of door.
Rail
the g height
from ceiling,
ENGAGED
Trolley
-- ReleaseArm
RELEASED
ONE-PIECEDOORWITHOUT TRACK
A 2x4 on its side is convenient for setting an ideal door-to-rail
distance.
1. Raise the opener onto a stepladder. You will need help at this
point if the ladder is not tall enough.
2. Open the door all the way and placea 2x4 on its side on the
top section of the door beneath the rail.
3. The top of the door should be levelwith 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