
10
1/2 HP Chain Drive Garage Door Opener
3. Slide the Inner Trolley and Outer Trolley back together.
4. Attach a pair of locking pliers 8 inches away from the center of the pulley to the rail as shown to keep the
trolley from moving when you attach the chain. Then pull on the cable until the trolley is snug against
the locking pliers:
5. Hold on to the chain and pull the slack out of the cable. Then wrap the chain around the sprocket as
shown:
6.Thread 1 nut (M-8) and place one spring washer (
∅
8) onto the trolley bolt at the end of the Chain
7.Insert the trolley bolt through the mounting hole as shown, and thread on the second nut (M-8) as shown.