The trolley on our garage door is no longer attached to the garage door opener track (with the operator) and the arm is hanging loose. I wasn't there when the trolley fell off the track, but was told that the trolley was disconnected from the operator and fell off when the garage door was lifted up.
From my research this doesn't seem to be a common issue. What could cause this? I don't see any obvious damage to the trolley, but can post additional pictures if need be.
Does this mean the trolley needs to be replaced?
How can I reattach the trolley? I don't see an easy way to slip it over the track, so it seems like the only options are taking the trolley apart and putting it back together once it's back in place or taking the track down and then slipping the trolley over.