1. Drop the notched side of the trolley clip into the
retaining slot on top of the trolley (Figure 1).
2. Grasp the clip connector at the end
of the belt and slip it through the belt
pulley bracket from behind, around
the pulley and toward the trolley.
3. Fasten the belt clip connector to the
trolley clip with a master link:
• Push pins of master link bar through
holes in trolley clip and belt clip
connector.
• Push master link cap over pins and
onto pin notches.
• Slide clip-on spring over cap and
onto pin notches until both pins are
securely locked in place.
4. With the trolley against the
screwdriver, dispense the belt along
the rail and around the opener
sprocket. The sprocket teeth must
engage the belt (Figure 2).
5. Use the second master link to connect the belt to
the flat end of the trolley threaded shaft (Figure 1).
Check to make sure the belt is not twisted.
6. Remove the screwdriver.
Assembly Step 4
Install the Belt & Set the Belt Tension
10
Serious injury can result if fingers become
entangled in moving opener sprocket. Attach
belt cap retainer securely. Never operate
opener while your hand is near the opener
sprocket.
WARNING
Nut
Ring
Trolley
Threaded
Shaft
Nut Ring
Slots
Trolley
Square End
Nut Ring
Trolley
Nut Ring
Trolley
1"
1-1/4"
BEFORE
AFTER RELEASE
Trolley
Threaded
Shaft
Spring
Trolley Nut
Trolley
Opener Sprocket
Belt
Pulley
Slip Belt Clip
Connector
through
Pulley Bracket
from this direction
and attach
to trolley clip
Trolley
Clip
Master Link
Clip-On Spring
Master
Link Cap
Trolley
Threaded Shaft
Master
Link Bar
Pin
Notch
Pin
Notch
Belt
Clip Connector
Figure 2
Figure 3
Figure 5
Figure 4
Figure 1
7. Insert the trolley threaded shaft through the hole
in the trolley.
8. Hold the belt at the trolley shaft to avoid twisting
as you thread the spring/trolley nut by hand on
the shaft until finger tight against the trolley
(Figure 3). Do not use any tools.
9. Insert a screwdriver tip into one of the nut ring
slots and brace it firmly against the trolley
(Figure 4).
10. Place a 7/16" open end wrench on the square
end. Roate about 1/4 turn until the spring
releases and snaps the nut ring against the
trolley (Figure 5).
This extends the spring for optimum belt tension.
Belt Clip
Connector
