After that start installing the sensors.
How to install a garage door opener chain.
Place the opener on a ladder and use scrap lumber to get it at the height you need.
Then install the motor brackets.
The garage door opener mounting bracket also called the header bracket secures the carriage tube to the wall above the door.
Lift the motor compartment into place on the ceiling and attach the rail and carriage to the bracket on the door.
Align the opener s rail with the center of the garage door.
The exact location depends on the type of door.
With a safety ring and a steel pin join the free end of the rail with the header bracket.
After that attach the motor to the brackets and verify the rail is perfectly horizontal with a bubble level.
Press the wall control button or remote so that the opener completes its close cycle and the sprocket on.
How to put a chain back on an automatic garage door opener step 1.
Follow the manufacturer s instructions to assemble the opener and mount the rail to the header bracket above the door.
Disengage the garage door from the opener by pulling down on the emergency pull cord to release the door trolley.
Set it securely on top of a stepladder so it s conveniently close to the ceiling.
Lift the power unit.