Chamberlain 2110 1/3 HP - Manual (Page 6)

6
ASSEMBLY STEP 1
Fasten the Rail to the Motor Unit
To avoid installation difficulties, do not run the
garage door opener until instructed to do so.
• Working on a level surface, align the rail assembly
with the motor unit, as shown.
• Slip the coupling over the rail sprocket.
• Slide the rail through the motor unit bracket until
the coupling fits securely over the motor unit
sprocket.
• Align the two bolt holes in the rail with those in the
motor unit bracket. Insert two 1/4"-20x5/8" hex
bolts and lock nuts. Tighten securely with a 7/16"
socket wrench.
ASSEMBLY STEP 2
Install the Trolley
• Slide the trolley onto and along the bottom of the
rail until it snaps firmly in place. Be certain to
install it facing correctly: the trolley release
arm must be horizontal (lock position), with its
arrow pointed away from the motor unit.
Rail
Sprocket
Rail
Assembly
Trolley
Coupling
Motor Unit
Bracket
Lock Nuts
1/4"-20
Motor Unit
Sprocket
Foam Packaging
Hex Bolts
1/4"-20x5/8"
Release arm
Arrow must point
toward garage door
Lock Nut
1/4" - 20 Hex Bolt
1/4" - 20 x 5/8"
HARDWARE SHOWN ACTUAL SIZE