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13
ASSEMBLY STEP 4
For Sectional and One-Piece Doors Only
Install the Chain
1. Dispense a few inches of chain
from carton and fasten to
trolley with a master link from
the hardware bag (Figure 1).
• Push pins of master link bar
through chain link and hole
in front end of trolley.
• Push master link cap over
pins and past pin notches.
• Slide clip-on spring over cap and onto pin notches until both
pins are securely locked in place.
2. With the trolley against the screwdriver, dispense the chain
around the chain sprocket bracket.
3. Continue along the rail and around the motor unit sprocket
(Figure 2). Proceed back around the correct groove in the chain
spreader (Figure 3). The sprocket teeth must engage the chain.
4. Use the second master link to connect the chain to the fl at end
of the shaft (Figure 1).
Check to make sure the chain is not
twisted.
5. Remove the screwdriver.
ATTACHING THE SPROCKET COVER
Position the sprocket cover over the motor unit sprocket so the
three holes in cover align with the three holes in mounting plate.
Attach with #8x3/8" hex screws provided (Figure 3).
To avoid possible SERIOUS INJURY to fi ngers from moving
garage door opener:
• ALWAYS keep hand clear of sprocket while operating opener.
• Securely attach sprocket cover BEFORE operating.
Motor Unit
Sprocket
Install Chain
In This Direction
Figure 2
Mounting
Plate
Sprocket
Hex Screws
#8x3/8"
Figure 3
Mantenga la cadena
tensa al sacarla
No saque la
cadena de la
caja para evitar
que se tuerce
Leave Chain
Inside Carton
to Prevent
Kinking
Keep Chain Taut
When Dispensing
Master
Link Bar
Flat End
of Trolley
Trolley
Pin
Pin Notch
Flat End of
Threaded Shaft
Master Link
Clip-On Spring
Master
Link Cap
Install Chain
In This Direction
Chain
Pulley
Bracket
Figure 1
Master
Link Bar
Flat End
of Trolley
Pin
Pin Notch
Flat End of Trolley
Threaded Shaft
Chain
Sprocket
Bracket
Install Chain
In This Direction
Trolley
Master Link
Clip-On Spring
Hex Screws
#8x3/8
"
Motor Unit
Sprocket
Install the Chain in
This Direction
Sprocket
Mounting
Plate
Master
Link Cap