13
Cable
Pulley
Cable
Loop
Master
Link Bar
Master Link
Clip-On Spring
Pin
Pin
Notch
Chain
Flat end
of Trolley
Threaded
Shaft
Master Link Cap
Master
Link Cap
Master Link
Clip-On Spring
Install Chain & Cable
In This Direction
ASSEMBLY STEP 5
For Sectional and One-Piece Doors Only
Install the Chain/Cable and Attach the
Sprocket Cover
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.
Model 3112EM:
•
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.
Model 3122EM:
•
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
flat end of the shaft (Figure 1).
Check to make sure
the chain is not twisted.
5. Remove the screwdriver.
ATTACHING THE SPROCKET COVER
3112EM ONLY
Insert the back tab in the slot on the back of the
mounting plate. Squeeze the cover slightly and insert the
front tab (Figure 4).
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.
Motor Unit
Sprocket
Install Chain
In This Direction
Chain
Spreader
Figure 2
Figure 1
Leave Chain
& Cable
Inside Carton to
Prevent Kinking.
Keep Chain & Cable
Taut When Dispensing
6-Tooth
Sprocket
Mounting
Plate
Chain
Spreader
8-Tooth
Sprocket
Mounting
Plate
Chain
Spreader
Figure 3
One-Piece Doors
6-Tooth Sprocket Application (Model 3122EM)
Sectional Doors
8-Tooth Sprocket Application (Model 3122EM)
(6-tooth sprocket can be used if slower travel speed is
desired.)
Sprocket
Cover
Mounting
Plate
Front Tab Slot
Back Tab Slot
Top of Motor Unit
Figure 4
