Assembly - Chamberlain 3000E Owner's Manual

ASSEMBLY STEP 1
For Sectional and One-Piece Doors ONLY
Assemble the T-Rail and
Attach the Cable Pulley Bracket
To avoid installation difficulties, do not run the garage
door opener until instructed to do so.
1. Align the four T-rail sections on a flat
surface exactly as shown. Center sections
are interchangeable. Front and back
sections are also interchangeable for ease
of assembly.
2. Insert the carriage bolts so the square bolt
necks seat in the square holes in the
T-rail sections and pass through the
round holes in the rail braces. Assemble
lock nuts, ensure alignment and tighten.
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 cable 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.
Cable pulley bracket
attaches to FRONT
END of rail
Rail
(End Section)
RAIL FRONT
(TO DOOR)
9
HARDWARE
SHOWN ACTUAL SIZE
Hex Bolt
5/16"-18x7/8"
RAIL BACK
(TO MOTOR UNIT)
Square Carriage
Bolt Hole
1/4" Lock Nut
Carriage Bolt
1/4"-20x1/2"
Rail
(Center Section)
Cable Pulley
Bracket
Lock Washer
5/16"
Carriage Bolts
Lock Nut
1/4"-20x1/2"
1/4"-20
Lock Washer
Nut
5/16"
5/16"-18
Rail
(End Section)
Hex Bolts
5/16"-18x7/8"
Nut
5/16"-18