On May 2, 8:12 pm, "Seamus J. Wilson" wrote:
Two car garage door, metal in 4 segments, four years old, has started to
derail the top wheel from the track when raised. The affected wheel has
considerable wobble apparently due to worn bushing.
Could the wheel be the problem?
Thank you,
Seamus J. Wilson

Could be, but it is probably also out of alignment. A wheel is
usually less than $5, so it would be a good place to start.

JK