Chamberlain 8200 1/2 HP - Manual (Page 8)

8
Assembly Step 1
Assemble the T-rail &
Attach the Belt Pulley Bracket
T-RAIL BACK
(TO OPENER)
T-RAIL FRONT
(TO DOOR)
Belt pulley bracket
attaches to FRONT
END of T-rail
T-rail
(End Section)
T-rail
(Center Section)
Carriage Bolt
1/4"-20x1/2"
T-rail
(End Section)
Square Carriage
Bolt Hole
1/4" Lock Nut
Bracket
Lock Washer
5/16"
Nut
5/16"-18
Hex Screws
5/16"-18x7/8"
Belt Pulley
Bracket
Bracket & Rail Must Be Aligned
Lock Washer
5/16"
Nut
5/16"-18
Make sure bolt
necks are
seated in the
square holes
and rails are
aligned before
you tighten lock
nuts. (See right
and wrong
views).
Improper
assembly can
cause jerky
trolley
operation, noise
and/or nuisance
door reversals.
To avoid installation difficulties, do not run the garage door opener until instructed to do so.
Assembly Section: Pages 8 – 11
When tightening
the screws, be
sure to keep
bracket parallel
to the rail.
Otherwise, the
rail may bow
when the opener
is operated.
Right Wrong
• Align the 4 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.
• 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.
If T-rail is not assembled
exactly as shown, trolley
will not travel smoothly
along length of rail or it
will hit against nuts.
• Position the belt pulley bracket on the front end of
the T-rail as shown. Fasten securely with the
hardware shown.
Right
Wrong
Lock Nut
1/4"-20x7/16"
Carriage Bolt
1/4"-20x1/2"
Hex Screw
5/16"-18x7/8"
Nut
5/16"-18
Lock Washer
5/16"
Hardware Shown Actual Size