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ASSEMBLY STEP 1
Attach the T-Rail To the Opener
To fasten rail, use only those screws mounted
in the top of the opener. Any other screws will
cause serious damage to the opener.
6
• Remove the two washered screws mounted in top
of opener.
• Align T-rail and styrofoam over opener sprocket.
• Cut tape from T-rail, belt and styrofoam.
• REMOVE STYROFOAM.
• Insert both washered screws through the T-rail into
the opener. Tighten both screws securely .
USE ONLY THESE SCREWS!
Any other screws
will cause serious damage to the opener.
Position belt over the opener sprocket.
USE ONLY THIS
TYPE AND SIZE
SCREW
Styrofoam
Belt
T-Rail
Hole
Washered Screw
5/16"-18x1/2"
Washered Screw
5/16"-18x1/2"
T-Rail
Hole
Opener
Sprocket
Belt
T-Rail
Hole
ASSEMBLY STEP 2
Set the Belt Tension
• By hand, thread the spring trolley nut on the
threaded shaft until it is finger tight against the
trolley (Figure A).
Do not use any tools.
• Insert a screwdriver tip into one of the nut ring
slots and brace it firmly against the trolley
(Figure B).
• Place a 7/16" open end wrench on the square
end. Rotate about 1/4 turn until the spring releases
and snaps the nut ring against the trolley (Figure C).
This extends the spring for optimum belt tension.
CAUTION
Assembly Section: Pages 6 - 7
Trolley
Threaded
Shaft
Spring
Trolley Nut
Trolley
Nut
Ring
Trolley
Threaded
Shaft
Nut Ring
Slots
Trolley
Square End
Figure A
Figure B
Nut Ring Trolley
Nut Ring
Trolley
1" 1-1/4"
BEFORE AFTER RELEASE
Figure C