Install The Chain/Cable And Attach The Sprocket Cover - Chamberlain 4142DC Manual Del Usuario

ASSEMBLY STEP 4
Install the Chain/Cable and
Attach the Sprocket Cover
FOR SECTIONAL AND ONE-PIECE DOORS ONLY
1. Pull the cable loop from the
carton and fasten it to the trolley
with a master link from the
hardware bag (Figure 1).
• Push pins of master link bar
through cable loop 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 cable
around the pulley.
3. Continue along the rail and around the motor unit sprocket
(Figure 2). The sprocket teeth must engage the chain. Continue
forward to the trolley threaded shaft.
4. Use the second master link to connect the chain to the flat
end of the shaft (Figure 1). Check to make sure the chain is
not twisted.
5. Remove the screwdriver.
6. 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).
Figure 3
Sprocket
Mounting
Plate
Leave Chain
& Cable
Inside Carton to
Prevent Kinking.
Keep Chain & Cable
Taut When Dispensing
Hex Screws
#8x3/8"
To avoid possible SERIOUS INJURY to fingers from moving
garage door opener:
• ALWAYS keep hand clear of sprocket while operating opener.
• Securely attach sprocket cover BEFORE operating.
Figure 1
Master Link
Clip-On Spring
Master Link Cap
Cable
Loop
Cable
Pulley
Install Chain & Cable
In This Direction
Figure 2
13
Master Link
Clip-On Spring
Master
Link Cap
Flat end
of Trolley
Threaded
Shaft
Chain
Pin
Notch
Master
Link Bar
Install Chain
Motor Unit
In This Direction
Sprocket
Pin