Install The Chain Spreader And The Chain - Chamberlain 1345 - 1HP Owner's Manual

ASSEMBLY STEP 4
Attach the Chain Spreader
and Re-install the Chain
MODELS 1356 AND 1346 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
Nut
Trolley
Figure 2
Inner Nut Trolley
and Washer Threaded Shaft
Rail
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.
USE ONLY
THIS TYPE
AND SIZE
SCREW
Figure 1
Chain
Spreader
Chain
Spreader
Figure 3
Chain
Spreader
Figure 4
10
#8x1"
Hex Screw
Washers
Chain
Spreader
Slot
Rail
Flange
8-Tooth
Sprocket
Motor Unit
Mounting Plate
6-Tooth
Sprocket
Motor Unit
Mounting Plate
Install Chain
In This Direction
Sprocket