sPoNiX wrote:


A short in one of the windings?

Once I had taken the vacuum cleaner to the whole thing - covered in old
flour etc. - everything seems to be in order. There is some
discolouration in the area nearest the brushes but this would seem to be
effect rather than cause.

Are any of the commutator segnemts
discoloured?

Yes. The copper (?) coating on one segment is gone but looks more like
cosmetic damage than anything major. Do you think this is significant?