Craftsman 139.53990DS Manual Del Propietário página 8

ASSEMBLY STEP 1
Assernble the Rail & Install the
Trolley
To avoid installation difficulties, do not run the
garage door opener until instructed to do so.
The front rail has a cut out "window" at the door end.
The front and back rail both have rail tabs. These rail
tabs MUST be on top of the rail when assembled.
1. Remove the straight door arm and hanging bracket
packaged inside the front rail and set aside for
Installation Step 5 and 12. NOTE: To prevent
INJURY while unpacking the rail carefully remove
the straight door arm stored within the rail section.
2. Align the rail sections on a flat surface as shown
and slide the tapered ends into the larger ones.
Tabs along the side will lock into place.
3. Place the motor unit on packing material to protect
the cover, and rest the back end of the rail on top.
For convenience, put a support under the front end
of the rail.
To prevent iNJURY from pinching, keep hands and
fingers away from the joints while assembling the rail.
4. As a temporary trolley stop, insert a screwdriver into
the hole 10" (25 cm) away from the front of the rail,
as shown.
5. Check to be sure there are 4 plastic wear pads
inside the inner trolley. If they became loose during
shipping, check all packing material. Snap them
back into position as shown.
6. Slide the trolley assembly along the rail from the
back end to the screwdriver.
7. Slide the rail onto the "U" bracket, until it reaches all
the stops on the top and sides of the "U" bracket.
Outer Trolley
\
Inner Tr011ey
Wear Pads
SLIDE TO STOPS
ON TOP AND
SIDES OF
"U"BRACKET
Trolley
\
Front Rail Section
(TO DOOR)
Rail Tab
Window
Cut-Out