Assembly; Assemble The Rai!And Install Tile Trolley - Chamberlain Whisper Drive Security+ 248739 Owner's Manual

ASSEMBLY STEP 1
Assemblethe Rail and install the Trolley
To avoid installation difficulties, do not run the garage
door opener until instructedto do so.
The front rail has a cut out "window" at the door end
(see illustration). The hole above this window is larger on
the top ef 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" (I2 cm) from the far end.
1. Remove the straight door arm and hanging bracket
packaged inside the front rail and set aside for
installation S_ep5 and 12. NOTE: To prevent lNJURY
while unpacking the rail carefully remove the straight
door arm stored within the rait section,
2. Align the raii sections on a fiat surface as shown and
slide the tapered ends into the larger ones. Tabs along
the side will lock into place,
To prevent iNJURY from pinching, keep hands and
fingers away from the jointswhile assembling the rail,
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 rait.
4. As a tempo_-arystop, inserta screwdriver into the hole
10" (25 cm) from tile front end ol therail, as shown.
5. Check to besure there are 4 plastic wear pads inside
the inner [rolley. if they became loose during shipping,
check all packing material. Snapthem back into
position as sl;own.
6. Slide the trolley assembly aIong the rail from the back
end to the screwdriver.
Back Rails
(TO MOTOR UNIT)
)ered
End
hmer Troiley
Wear Pads