Lift the power unit.
How to install garage door opner on garage door.
Place the opener on a ladder and use scrap lumber to get it at the height you need.
The exact location depends on the type of door.
Lean the end of the assembly opposite the motor compartment up above the garage door.
After that attach the motor to the brackets and verify the rail is perfectly horizontal with a bubble level.
Follow the manufacturer s instructions to assemble the opener and mount the rail to the header bracket above the door.
Align the opener s rail with the center of the garage door.
Set it securely on top of a stepladder so it s conveniently close to the ceiling.
With a safety ring and a steel pin join the free end of the rail with the header bracket.
Fix the door bracket in place.
Then install the motor brackets.
Install the garage door opener.
To install the opener you ll need to hang another angle iron from the center joist on your garage s ceiling.
After that start installing the sensors.
Follow the included instructions to hook up the opener and fasten it to the spring system with a pulley and cable.
Garage door openers come in several varieties.