Assembly Section: Pages; Assemble T-Rail; Attach Cable Pulley Bracket - Chamberlain 5100-2K Owner's Manual

To avoid installation difficulties, do not run the garage door opener until instructed to do so.
Assembly Step 1
Assemble the T-rail
Cable Pulley
& Attach the Cable Pulley Bracket
Bracket
• 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.
Lock Washer
• Insert the carriage bolts so the square bolt necks
5/16"
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 the nuts.
Cable pulley bracket
attaches to FRONT
END of T-rail
• Position the cable pulley bracket on the front end
of the T-rail as shown. Fasten securely with the
hardware shown.
Cable Pulley
Bracket
Lock Washer
5/16"
4/16/89 6/27/89 3/9/92
Assembly Section: Pages 8 – 11
Hex Screws
5/16"-18x7/8"
Nut
5/16"
T-rail
(End Section)
T-RAIL FRONT
(TO DOOR)
Hex Screws
5/16"-18x7/8"
Nut
5/16"
1/4" Lock Nut
Hardware Shown Actual Size
Lock Nut
1/4"-20
Hex Screw
5/16"-18x7/8"
Right
8
T-RAIL BACK
(TO OPENER)
Square Carriage
Bolt Hole
Carriage Bolt
1/4"-20x1/2"
T-rail
(Center Section)
Make sure bolt
necks are
seated in the
square holes
and rails are
aligned before
you tighten lock
Right nuts. (See right
and wrong
views).
Improper
assembly can
cause jerky
trolley
operation, noise
and/or nuisance
Wrong
door reversals.
Right
Carriage Bolts
1/4"-20x1/2"
Nut
5/16"-18
When tightening
the screws, be
sure to keep
bracket parallel
to the rail.
Otherwise, the
rail may bow
when the opener
Wrong
is operated.
T-rail
(End Section)
Wrong
Lock Washer
5/16"