Chamberlain FS2 Security+ Owner's Manual page 9

ASSEMBLY STEP 1
For Sectional and One-Piece Doors ONLY
Assemble the 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 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, rail has a front-to-back position as
shown).
NOTE: If 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 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
Brace
Square Carriage
Bolt Holes
RAIL FRONT
(TO DOOR)
HARDWARE SHOWN ACTUAL SIZE
Hex Bolt
5/16"-18x7/8"
Lock Nut 1/4"-20
Brace
Rail
(Center Section)
Chain Pulley
Bracket
Lock Washer
5/16"
9
Lock Nut Carriage Bolts
1/4"-20 1/4"-20x1/2"
Nut Lock Washer
5/16"-18 5/16"
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"-18
13 mm Socket Wrench