Assembly Step - LiftMaster 1220EM FS2 Manual Del Usuario

ASSEMBLY STEP 1

For Sectional and
One-Piece Doors ONLY
Assemble the T-Rail and
Attach the Chain Pulley Bracket
To avoid installation difficulties, do not run the
garage door opener until instructed to do so.
1. Place the 3 T-rail sections on a flat surface for
assembly. The end sections are identical.
The center section must be positioned
with the braces against the end
sections as shown. Make sure the
"directional arrow" on the center
section is pointing toward the front (to
door). Study the illustration carefully.
2. Bolt rail sections together with the
hardware illustrated and from the
direction indicated. (When assembled,
T-rail has a front-to-back position as
shown.)
NOTE: If T-rail is not assembled exactly as shown,
trolley will not travel smoothly along length of rail or
it will hit against nuts.
3. Position the chain pulley bracket on the front end
of the T-rail as shown. Fasten securely with the
hardware provided.
NOTE: When tightening the bolts be sure to keep
bracket parallel to the rail. Otherwise, the rail may
bow when the opener is operated.
Rail
(End Section)
Chain pulley bracket
attaches to FRONT
END of Rail
RAIL FRONT
(TO DOOR)
Brace
Rail
(Center Section)
Square Carriage
Bolt Holes
HARDWARE
SHOWN ACTUAL SIZE
Hex Bolt
5/16"-18x7/8"
1/4'' Lock Nut
Brace
Chain Pulley
Bracket
Lock Washer
5/16"
9
Carriage Bolts
Lock Nut
1/4"-20x1/2"
1/4"-20
Nut Lock Washer
5/16"
5/16"-18
11 mm Socket Wrench
RAIL BACK
(TO OPENER)
Rail
(End Section)
Carriage Bolt
1/4"-20x1/2"
Hex Bolts
5/16"-18x7/8"
Nut
5/16"
13 mm Socket Wrench