Install Trolley; Fasten T-Rail To Opener - Chamberlain 3500 - 1/2HP Series Owner's Manual

Assembly Step 2
Install the Trolley on the T-rail
• Attach the trolley threaded shaft to the trolley with Lock
Washer
the lock washer and nuts as shown.
5/16"
Nut
5/16"-18
Lock
Washer
5/16"
Outer Nut
5/16"
Trolley
Temporary Stop
Screwdriver
Écrou extérieur
de 5/16 de po
Assembly Step 3
Fasten the T-rail to the Opener
• Place the opener on packing material to protect
the cover. For convenience, put a support under
the cable 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 T-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 trolley
stop hole in the T-rail as shown. Tighten securely
with a 5/16" lock washer and nut. This screw limits
trolley travel in the UP direction.
Hardware Shown Actual Size
Hex Screw
5/16"-18x7/8"
Trolley
Inner Nut
5/16"
Trolley
Threaded
Shaft
Trolley
Rondelle-frein
de 5/16 de po
Écrou intérieur
Nut Lock Washer
5/16"
5/16"-18
Hardware Shown
Actual Size
Lock Washer
5/16"
Écrou extérieur
de 5/16 de po
Chariot
• As a temporary stop, insert a screwdriver into the
hole in the front end of the T-rail.
• Slide the trolley assembly along the rail to the
screwdriver stop.
If trolley hits against any nuts on the T-rail, the
Tige filetée
du chariot
bolts and nuts were attached from the wrong
side and must be repositioned. Review Step 1.
To fasten rail, use only those screws mounted
in the top of the opener. Any other screws will
cause serious damage to the opener.
Washered Screw
5/16"-18x1/2"
Hex Screw
5/16"-18x7/8"
Trolley
Stop Hole
T-rail
(Back Section)
Lock
Washer
5/16"
Nut
5/16"-18
9
Trolley
Nut
5/16" -18
Rondelle-frein
de 5/16 de po
Tige filetée
du chariot
Écrou intérieur
de 5/16 de po
CAUTION
USE ONLY THIS
TYPE AND SIZE
SCREW
Chariot
Trolle