Install Trolley; Fasten T-Rail To Opener - Craftsman 139.53525SRT Owner's Manual

Assembly Step 2
Install the Trolley on the T-rail
• Attach the threaded shaft to the trolley with the
lock washer and nuts as shown.
TroIiey
Outer Nut
Lock Washer
5/16"
Trolley
Threaded Shaft
Inner Nut
5/16"
Hardware Shown
Actual Size
Lock Washer
5/16"
©
Nut
5/16"-18
Temporary Stop
Screwdriver
\
• 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
bolts and nuts were attached from the wrong
side and must be repositioned. Review Step 1.
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.
Washered Screw
5/16"-18xl/2"
Hex Screw
5/16"-18x7/8"
Trotley
Stop
T-rail
(Back Section)
5/16"
5/16"-18
Hardware Shown Actual Size
D©
Hex Screw Nut Lock Washer
5/16"- 18x7/8" 5/16" 5/16"