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Assembly

1 Attach the Rail to the Garage Door Opener
To avoid possible SERIOUS INJURY to finger from moving garage door opener:
ALWAYS keep hand clear of sprocket while operating opener.
l
Securely attach sprocket cover BEFORE operating.
l
To avoid SERIOUS damage to garage door opener, use ONLY those bolts/fasteners mounted in the
top of the opener.
NOTE: ONLY use the bolts removed from the garage door opener. Place the garage door opener on
the packing material to prevent scratching.
1. Remove the two bolts from the top of the garage door opener.
2. Align the rail and the styrofoam over the sprocket. Cut the tape from the rail, belt, and
styrofoam.
3. Fasten the rail with the previously removed bolts.
4. Position the belt around the garage door opener sprocket.
5. Attach the sprocket cover over the garage door opener sprocket and attach with hex screws.
Washered Bolt 5/16"-18x1/2"
(Mounted in the garage
door opener)
Model 8550W
Washered Bolt
5/16"-18x1/2"
Model 8557W
Washered Bolt
5/16"-18x1/2"
6
HARDWARE
Hex Screw
#8x3/8"
(Packed with the
sprocket cover)
Hex Screw
#8x3/8"
Lock Nut
Hex Screw
#8x3/8"

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