Attaching The Sprocket Cover - LiftMaster MERIK SECURITY+ 790LMK Manual Del Propietário

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).
Hex Screws
Figure 3
Hex Screws
#8x3/8"
#8x3/8"
Sprocket
Sprocket
Mounting
Mounting
Plate
Plate
Leave Chain
No saque la
Inside Carton cadena de la
caja para evitar
to Prevent
que se tuerce
Kinking
Keep Chain Taut
Mantenga la cadena
When Dispensing tensa al sacarla
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.
Figure 1
Chain Chain
Install Chain
Install Chain Pulley
Sprocket
In This Direction
In This Direction Bracket
Bracket
Figure 2
13
Master Link
Master Link
Clip-On Spring
Clip-On Spring
Master
Master
Link Cap
Link Cap
Flat End of
Flat End of Trolley
Threaded Shaft
Threaded Shaft
Pin Notch Pin Notch
Pin
Pin
Trolley
Trolley
Flat End
Flat End
of Trolley
of Trolley
Master
Master
Link Bar
Link Bar
Install the Chain in
Install Chain
Motor Unit
Motor Unit
This Direction
In This Direction
Sprocket
Sprocket