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ASSEMBLY STEP 4
Attach the Chain Spreader
and Re-install the Chain
MODELS 1356M AND 1346M ONLY
• Line up the holes in the chain spreader with the holes
in the motor unit as shown. The slot in the chain
spreader must fit over the Rail flange
(Figure 1).
• Securely fasten the chain spreader with the hardware
provided.
• Remove the trolley threaded shaft from the trolley by
loosening the inner nut and lock washer (Figure 2).
• Guide the chain around the selected groove in the
chain spreader (to engage either the 8-tooth sprocket
or the 6-tooth sprocket) as shown (Figure 3).
• Continue dispensing the chain forward to the trolley
(Figure 4). Reconnect the trolley to the trolley
threaded shaft. Proceed to Assembly Step 3 for chain
tightening instructions.
Outer
Inner Nut
Trolley
Nut
and Washer
Threaded Shaft
Rail
Trolley
Figure 2
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.
#8x1"
Hex Screw
Washers
USE ONLY
Chain
THIS TYPE
Spreader
AND SIZE
Slot
SCREW
Rail
Flange
Figure 1
Chain
Spreader
8-Tooth
Sprocket
Motor Unit
Mounting Plate
Chain
Spreader
6-Tooth
Sprocket
Motor Unit
Mounting Plate
Figure 3
Install Chain
In This Direction
Chain
Spreader
Sprocket
Figure 4
Page 10
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