Assemble The Rail And Attach The Cable Pulley Bracket; Assembly Step - Craftsman 139.536481DM Manual Del Propietário

ASSEMBLY STEP 1

Assemble the Rail and
Attach the Cable Pulley Bracket
To avoid installation diffi culties, do not run the garage door
opener until instructed to do so.
1. Align the three rail sections on a fl at surface exactly as shown.
Front and back sections are interchangeable for ease of
assembly.
2. Insert the carriage bolts so the square bolt
necks seat in the square holes in the rail
sections and pass through the round holes in
the center section rail. 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 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 rail as
shown. Fasten securely with the hardware shown.
NOTE: When tightening the bolts, be sure to keep bracket
parallel to the rail. Otherwise, the rail may bow when the opener
is operated.
Rail
(End Section)
Cable pulley bracket
attaches to FRONT
END of Rail
Rail
(Center Section)
Brace
Square Carriage
Bolt Holes
HARDWARE SHOWN ACTUAL SIZE
Lock Nut
1/4" - 20 x 7/16"
Hex Screw
5/16" - 18 x 7/8"
1/4" Lock Nut
Brace
Hex Bolts
5/16"-18x7/8"
Cable Pulley
Bracket
Lock Washer
Nut
5/16"
5/16"
8
Carriage Bolts
1/4" - 20 x 1/2"
Nut Lock Washer
5/16"
5/16" - 18
Rail
(End Section)
Carriage Bolt
1/4"-20x1/2"