Assembly Step - LiftMaster MERIK SECURITY+ 790LMK Manual Del Propietário

ASSEMBLY STEP 1

For Sectional and One-Piece Doors ONLY
Assemble the T-Rail and Attach the Chain
Sprocket Bracket
To avoid installation difficulties, do not run the garage door
opener until instructed to do so.
1. Place the 3 T-rail sections on a fl at surface for assembly.
The end sections are identical. The center section must
be positioned with the braces against the
end sections as shown. Make sure the
"directional arrow" on the center section is
pointing toward the front (to door). Study the
illustration carefully.
2. Bolt rail sections together with the hardware
illustrated and from the direction indicated.
(When assembled, T-rail has a front-to-back
position as shown.)
NOTE: If T-rail is not assembled exactly as
shown, trolley will not travel smoothly along
length of rail or it will hit against nuts.
3. Position the chain sprocket bracket on the front end of the
T-rail as shown. Fasten securely with the hardware provided.
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
Rail
(End Section)
(End Section)
Chain Sprocket Bracket Cable pulley bracket
attaches to FRONT
attaches to FRONT END
END of Rail
of Rail
Brace
Brace
Square Carriage
Square Carriage
Bolt Holes Bolt Holes
RAIL FRONT
RAIL FRONT
(TO DOOR)
(TO DOOR)
HARDWARE
SHOWN ACTUAL SIZE
Hex Bolt
5/16"-18x7/8"
1/4" Lock Nut 1/4'' Lock Nut
Brace Brace
Rail
Rail
(Center Section)
(Center Section)
Chain Pulley
Chain Sprocket
Cable Pulley
Bracket
Bracket
Bracket
Lock Washer
Lock Washer
5/16"
5/16"
Lock Washer
5/16"
9
Carriage Bolts
Lock Nut
1/4"-20x1/2"
1/4"-20
Lock Washer
Nut
5/16"
5/16"-18
11 mm Socket Wrench
RAIL BACK
RAIL BACK
(TO OPENER)
(TO OPENER)
Rail
Rail
(End Section)
(End Section)
Carriage Bolt Carriage Bolt
1/4"-20x1/2"
1/4"-20x1/2"
Hex Bolts
Hex Bolts
Hex Bolts
5/16"-18x7/8"
5/16"-18x7/8"
5/16"-18x7/8"
Nut
Nut
Nut
5/16" 5/16"
5/16"
13 mm Socket Wrench