This is almost always the result of a dirty or obstructed safety feature.
Garage door shake go going down.
You push the button to close the garage door.
If your garage door hits it bounces up and starts to open again your garage door is working well.
If your garage door shakes when opening or closing or sounds like it is going to fall off the track the problem is most often the pulleys.
Simply lay a 2 by 4 on the ground and let the garage door come down on top of it.
Depending on the brand.
In a typical situation the motor for your garage door opener should stop running once the door has closed.
Turn the down adjustment one full turn counterclockwise.
As a result the door may fall too fast as it closes.
Over time the springs of the garage door can get worn out or break.
As a result they are unable to balance out the weight of the door as it opens and closes.
Lastly you ll want to perform a safety test.
For most doors a complete rotation of the screw allows the door to advance 2 inches.
Repairing garage door springs.
Press fit pulleys and cast iron pulleys.
There are two types of pulleys used in garage door systems.
If you find that it keeps running this can present a problem in your system.
First check the sensor lights.
It goes partway down reverses direction and goes back up again.
Press fit pulleys are the most used type of pulley system.
Clutter or obstructions that block the sensor are the first problems to look for if your door won t close or in extreme cases open at all.
Your garage door s pulley system is responsible for ensuring that the door moves smoothly up and down on its tracks so strange behavior like shaking as the door descends warrants further investigation of the pulleys.
There are two types of pulleys.
However if your garage door doesn t bounce back up then you know you have a problem.