Assembly Step 2
Install the Trolley on the Rail
• Place the opener on packing material to protect the
cover. For convenience, put a support under the
chain pulley bracket.
• Remove the (2) 5/16"-18x1/2" washered screws
mounted in the top of the opener.
• Align the holes in the back section of the rail with
the holes in the opener.
• Fasten the rail with the (2) washered screws
previously removed. Tighten securely.
Remember to use only these screws! Any other
screws will cause serious damage to the opener.
• Insert a 5/16"-18x7/8" hex screw into the cover
protection bolt hole in the rail as shown. Tighten
securely with a 5/16" lock washer and nut.
NOTE: This screw prevents trolley over-travel.
Keep a 2" minimum between the trolley and this
screw when adjusting travel limits (see page 24).
8
• Attach the threaded shaft to the trolley with the
lock washer and nuts as shown.
• As a temporary stop, insert a screwdriver into the
hole in the front end of the rail.
• Slide the trolley assembly along the rail to the
screwdriver stop.
If trolley hits against any nuts on the rail, the
bolts and nuts were attached from the wrong
side and must be repositioned. Review Step 1.
Assembly Step 3
Fasten the Rail to the Opener
To fasten rail, use only those screws mounted
in the top of the opener. Any other screws will
cause serious damage to the opener.
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