Thread the nut s facing the door clockwise until it meets the bracket then release the chain.
How to attach a garage door arm to the chain.
You should have 1 2 inch of play in the chain.
The exact location varies depending on the door.
This is where the opener arm attaches the opener to the door.
Attach the bracket that connects the arm to the door then attach the arm itself.
On the chain there is a device called the trolley.
Press down on the chain with your finger.
Pull out the cotter bolt with the pliers.
Swivel the arm down and allow it to.
Attach the bracket that connects the arm the door is opened by one arm that raises it as the carriage travels along the tube.
Using pliers remove the cotter pin from the cotter bolt that attaches the upper end of the door arm to the carriage.