Check the safety sensors.
Garage door shimmies closing.
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There are two types of pulleys.
But it still shakes.
My garage door opener starts to close then goes backs up.
The motor and drive seem to work fine but when i want to close the garage door there is a lot of noise and the door seems to move down in jerks and starts.
All these situations will cause the sensors to tell the garage door opener not to close there could be an obstruction.
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.
Press fit pulleys and cast iron pulleys.
Most companies use a press fit pulley which is made up of two separate pieces attached by ball bearings onto the.
So i finally got some wd 40 and sprayed the track.
If you garage door is lowering then reversing back to the open position there could.
If it isn t it could get in the way of the electronic beam and prevent the garage door from closing because the cardboard tube is breaking the beam.
9 times out of 10 the sensors have been bumped have something in front of them or are just plain dirty.
Garage door openers manufactured after 1993 include sensors to prevent a door from closing on a child or pet.
Once you ve determined the proper length of tube to block the sun from the electric eye you may want to go to a hardware store and invest in some plastic or rubber tubing that would be more.