ASSEMBLY STEP 4
For Sectional and
One-Piece Doors Only
Install the Chain and Attach the
Sprocket Cover
INSTALLING 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 pulley.
3. Model 1210E:
• 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 1220E:
• 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 1210E
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).
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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.
