When you pull it it disconnects the door from the drive mechanism.
Garage door red pull string.
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If you intend to leave your door in the manual setting pull the red cord backwards towards the motor.
There s usually a little lever that the string attaches to.
Pulling the red release cord will disengage the trolley from the opener carriage the part that is moved by the motor along the rail.
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Push up on it and it should snap into place.
Now go push the button.
Through the attachment point the trolley is also connected to the opener carriage.
Liftmaster 41a2828 red emergency pull rope with handle.
It could happen for any number of reasons but some people have trouble figuring out how to reconnect the door to the automated system.
The color code on a torsion spring indicates whether it is a right wind or left wind spring with black indicating right wind and red indicating left wind.
The opener carriage is the automated mechanism that moves the door along the door rail track.
Beyond that the torsion spring is color coded so that technicians can determine the thickness or gauge of the wire.
The trolley is connected to the door and moves with the door as it opens and closes.
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The emergency release cord is the red rope that hangs from the door trolley.
Once these two parts are separate you can move your garage door manually.