Craftsman 139.53674SRT - Manual (Page 9)

Assembly Step 2
Install the Trolley on the T-rait
Attach the threaded shaft to the trolley with the
lock washer and nuts as shown.
Hardware Shown
Actual Size
Lock Wastter
5/16"
Outer Nut
S/16'
Trolley
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-rall, 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 materid 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 cover
protection bolt hole in the T-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 28).
Hardware Shown Actual Size
>—
I I I I I
. .
nil
Hex Screw
Sne*-10 x7/B‘
Nut
5/16*- 10
Lock Washer
5/16*
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*-10x7/8'
Cover \
Prolection
Bolt Hole
T-rail
(Beck Section)
Lock Washer
S/16'
Nut
5/i6*-ia