Chamberlain CG40CD User Manual download pdf (Page 8)

FRONT RAIL

(TOP)

KEEP LARGER

HOLE ON TOP

ASSEMBLY STEP 1

Assemble the Rail & Install the Trolley

To avoid installation difficulties, do not run the

garage door opener until instructed to do so.

Front Rail

(TO DOOR)

Window

Cut-Out

Screwdriver

Idler

Pulley

Hole

Tabs

Back Rails

(TO MOTOR UNIT)

Trolley

Tapered

End

Tapered

End

Inner Trolley

Wear Pads

Outer Trolley

Tapered

End

Tapered

End

To prevent INJURY from pinching, keep hands and

fingers away from the joints while assembling the rail.

WARNING

CAUTION

WARNING

The front rail has a cut out “window” at the door end

(see illustration). The hole above this window is

larger on the top of the rail than on the bottom. A

smaller hole 3-1/2" (8.9 cm) away is close to the rail

edge. Rotate the back rail so it has a similar hole

close to the opposite edge, about 4-3/4" (12 cm)

from the far end.

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.

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.

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Chamberlain CG40CD User Manual Page 8

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