Originally Posted by charliez
why did the magnet stay engaged long enough to get hot and melt?
Because voltage was being applied to it when it was not supposed to be.
If that was the case ALL of the brakes would hav engaged. This I would have felt and the rest of the 3 brakes would also be hot...that was not the case.
Please don't get me wrong I am not arguing but just discounting certain events through a process of elimination.
I cannot think of any case in which only one brake could get power/voltage and the others not when the wires are all connected together.
Now you are correct the magnet had to have stayed engaged on the drum for this to happen...Why and How is the question.
It could be that some part had broken off and fallen behind the magnet that stopped the magnet from disengaging...but I found no direct evidence of that when I opened the wheel.
This may remain a mystery...I am still hoping this has happened to someone else and I will hear from them.