Craftsman 139.53674SRT - Manual (Page 8)

Assembly Section: Pages 8-11
To avoid installation difftcutties, do not run the garage door opener until instructed to do so.
Assembly Step 1
Assemble the T-rail & Attach
the Cable Pulley Bracket
• Align the 3 T-rail sections on a flat surface exactly
as shown. The end’sections are identical. Make
sure the "arrow label" on the center section is
pointing toward the door.
• Insert the carriage bolts so the square bolt necks
seat in the square holes in the T-rail end sections
and pass through the round holes in T-rail center
section. Assemble lock nuts, ensure alignment and
tighten.
Make sure bolt necks are
seated In the square
holes and rails are
aligned before you
tighten lode nuts. (See
ri^ and wrong views).
Improper assembly can
cause jericy trolley
operation, noise andfor
nuisance door reversals.
Right Wrong
T-SAIL BACK
(TO OPENER)
1/4“ Lock Nut
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 puOay bracket
attaches to FRONT
ENDofT-ral
> Position the cable pulley bracket on the front end of the
T-rail as shown. Fasten securely with the hEudware.
Cable Puley
Bracket
Right Wrong
When tightening
the screws, be
sure to keep
bracket parallel
to the rail.
Otherwise, the
rail may bow
when opener Is
operated.
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