Cast iron pulleys are the less popular pulley type that consist of one solid cast iron piece.
Garage door opener shakes when closing.
Press fit pulleys and cast iron pulleys.
In a worn pulley system the cables often get caught and cause the door to jerk or shake as it closes.
Damage on the tracks will often be in form of bends or crimps.
In a torsion spring system the spring will be mounted on a spring bar torsion tube that is mounted to the header above the garage door opening.
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.
Here s how to easily fix a garage door that jerks when opening.
This issue tends to be worse when the door has been closed for a while.
There are two types of pulleys.
If your press fit pulley system has surrendered you may be able to see frayed cables or a separated press fit casing.
They should be inspected to ensure that they are aligned correctly on the wall.
What should you do if there is damage to the garage door.
When the door is opening or closing it runs on a set of tracks which keep the door in place.
The first thing you should do is close the garage door and inspect the spring s.