Install Trolley; Fasten Rail To Power Head - Chamberlain CSO Owner's Manual

Assembly Step 2
Install the Trolley on the Rail
• Attach the threaded shaft to the trolley with the
lock washer and nuts as shown.
Outer Nut
5/16"
Trolley
Temporary Stop
Screwdriver
Assembly Step 3
Fasten the Rail to the Power Head
• Place the power head 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 power head.
• Align the holes in the back section of the rail with
the holes in the power head, as shown.
• 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 power
head.
Lock
Washer
5/16"
Trolley
Threaded
Shaft
Inner Nut
5/16"
8
Hardware Shown Actual Size
Hex Screw
5/16"-18x7/8"
Hex Screw
5/16"-18x7/8"
Trolley Stop
Hole
Nut
5/16"-18
• 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.
• Insert a 5/16"-18x7/8" hex screw into the trolley stop
hole in the rail as shown. Tighten securely with a
5/16" lock washer and nut. This screw limits trolley
travel in the UP direction.
CAUTION CAUTION
To fasten rail, use only those screws mounted
in the top of the power head. Any other screws
will cause serious damage to the power head.
5/16"-18x1/2"
Washered Screws
Trolley Stop
Hole
Lock Washer
Nut
5/16"-18
5/16"
Trolley
Lock Washer
5/16"
USE ONLY THIS
TYPE AND SIZE
SCREW