Install The Chain/Cable And Attach The Sprocket Cover - Chamberlain LiftMaster Security+ 311 Owner's Manual

ASSEMBLY STEP 4
Install the Chain/Cable
and Attach the Sprocket Cover
INSTALLING THE CHAIN/CABLE
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.
ATTACHING THE SPROCKET COVER
Insert the back tab in the slot on the back of the
mounting plate. Squeeze the cover slightly and insert
the front tab (Figure 3).
Figure 3
Sprocket
Cover
Front Tab Slot
Mounting
Plate
Leave Chain &
Cable Inside
Dispensing
Carton to
Prevent Kinking
Keep Chain and Cable
Taut When Dispensing
Back Tab Slot
WARNING
To avoid possible SERIOUS INJURY to fingers from
moving garage door opener:
CAUTION
• 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
10
Master Link
Clip-On Spring
Master
Link Cap
Flat end
of Trolley
Threaded Shaft
Chain
Rail
Pin Notch
Pin
Trolley
Master
Link Bar
Motor Unit
Sprocket