Install Trolley; Fasten T-Rail To Opener - Craftsman 139.53678SRT Owner's Manual

Assembly Step 2
Install the Trolley on the T-raft
• Attach the threaded shaft to the trolley with the
lock washer and nuts as shown,
Trolley
OuterNut
LockWasher
5/16"
Trolley
ThreadedShalt
Inner Nut
5/16"
I
Hardware Shown
Actual Size
LookWasher Nut
5/16' 5/16--18
• As a temporary stop, insert a screwdriver into the
hole in the front end of the T-reil,
• 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 repoeitioned. Review Step 1.
Assembly Step 3 1
Fasten the T.rail to the Opener
I
• 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"-18xl/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 screwsl Any other
screws will cause serious damage to the opener.
• Insert a 5/16"o18X7/8' he)( screw into the t:over
protection bolt hole in the T-rail as shown. Tighten
securely with a 5/16" lock washer and nuL
NOTE: This screw prevents trolley over-travel.
Keep a 2" minimum between the trolley and this
screw when adjusting travel limits (see page 28).
WasheredScrew
5/16--180(1/2'
Cover
Protection
Hardware Shown Actual Size
I'kmSorew Nut LockWuher
5/16--18X7/6- 5/18" 5/1r