Chamberlain SECURITY+ 4200C Serie Manuel Du Propriétaire page 8

ASSEMBLY STEP 1
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. Make sure bolt necks are
seated in the square holes and rails
are aligned before you tighten lock
nuts. Improper assembly can cause
jerky trolley operation, noise and/or
nuisance door reversals.
3. 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.
4. Position the cable pulley bracket on the front end
of the T-rail as shown. Fasten securely with the
hardware shown.
NOTE: When tightening the screws, be sure to
keep bracket parallel to the rail. Otherwise, the rail
Cable pulley bracket
attaches to FRONT
END of T-rail
may bow when the
opener is operated.
T-rail
(End Section)
T-RAIL FRONT
(TO DOOR)
HARDWARE
SHOWN ACTUAL SIZE
Hex Screw
5/16"-18x7/8"
Square Carriage
Bolt Hole
1/4" Lock Nut
T-rail
(Center Section)
Cable Pulley
Bracket
Lock Washer
5/16"
8
Carriage Bolts
Lock Nut
1/4"-20x1/2"
1/4"-20
Lock Washer
Nut
5/16"-18 5/16"
T-RAIL BACK
(TO MOTOR UNIT)
T-rail
(End Section)
Carriage Bolt
1/4"-20x1/2"
Hex Screws
5/16"-18x7/8"
Nut
5/16"-18