This is the distance between the top of the door and the nearest obstruction toward the rear of the garage.
How to install a roll up garage door motor.
Attach brackets to the ceiling and door and position the end of the rail above the closed door.
The garage door opener motor is the part that activates the lifting mechanism to either raise or lower the garage door.
Anyone who has above average mechanical skills and is able to follow detailed yet easy to read instructions should be able to safely install sectional garage doors with extension springs or the simple set torsion spring system.
The one that we recommend is the centurion rdo ii.
This is a video of us installing a janus 1000 insulated commercial garage door.
Tie the extension spring to the roller track then detach the cable from the bottom bracket with a pair of pliers.
When installing a new garage door opener you will need to do what is called fit the motor assembly.
Release the tension on side mounted extension springs by lifting the door and locking it in place on each side with a pair of locking pliers.
This will depend on available space and cabling.
To install a garage door opener first assemble the rail carriage pulley and motor compartment according to the instructions.
This is generally easy to do as it goes in behind the railing system of the garage door opener.
The standard rule of thumb is the door height plus an additional 18 inches.
The centurion rdo ii garage door opener is a great motor to install for your roll up garage door.
As usual there are a couple of options for automating roll up doors.
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Eliminate garage door tracks forever.
Make sure there is enough side room 135mm from end of door shaft to the wall to slide drive assembly onto shaft.
Lift the motor compartment into place on the ceiling and attach the rail and carriage to the bracket on the door.
We install the motor on either the left or the right hand side of the door.
Fixing drive assembly to the door right hand installation the drive assembly can be fixed to the roll up garage door in a variety of ways.
A final consideration for door clearance is the depth of the garage.
Below we will describe one method of fixing.