Skip to main content

Scores and pits

Scores and pits

Usually pitting and scoring of the commutator segments are caused by electrical arcing between the commutator and badly fitted, poorly seating or worn-out brushes.

Explained in

    Replacing dynamo brushes

    The carbon brushes are a sliding fit in oblong holders on the dynamo endplate. Coiled springs bear against the tops of the brushes to hold them in contact with the commutator. Read more

icon-search