Assembly Seotlon - Pages - Craftsman 139.53335SRT3 Owner's Manual

Assembly Section: Pages 8 - 11
To avoid installation difficulties, do not run the garage door opener until instructed to do so.
Assembly Step I
Assemble the T-rail & Attach
the Cable Pulley Bracket
• Alignthe 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
pointingtoward 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 alignmentand
tighten,
Makesureboltnecksare
in the square
holesand rails are
alignedbeforeyou
tighten
lock nuts.
(See
rightand wrongviews). _ J
Improper assemblycan
cause Jerky trolley
opera.n, noiseand/or Right
nulsencedoorreversals.
T-rail
1/4" LOCkNut (End Section)
\
Wrong
T-RAIL BACK
(TO OPENER)
O
Brace
If T-rag Is not assembled I
EXACTLYas shown,trolley I
will not travel smoothly
along length of rail or It will
hit againstthe nuts. I
T-rail
(CenterSection]
-, Carriage Bclt
, _ 1/4"-20xl/2"
T-rail
(End Section)
Cable pulley bracket
aUa¢_4_ to FRONT
END of T-rail Square Carnage
Bolt Hctss
T-RAIL FRONT
(TODOOR)
• Positionthe cable pulleybracketon the frontend of the
T-rail as shown.Fasten securelywith the hardware.
Hardware Shown Actual Size
©
Lock Nut
1/4" - 20 x 7116"
Hex ,3cr_
5/16" - 18 x 7/8"
Carriage Bolts
1/4" - 20 x 1/2"
@©
5/16" - 18 5/16"
Hex Scm_s
5/16'-18x7/8"
L°Ck_lW6a,she r _-Nut
5/16'
@@
Right Wrong
When tightenlng
the screws, be
sure to keep
bracket parallel
to the rail.
Otherwise, the
rail may bow
when opener Is
operated,
8