Checking Brushes And Commutator
Examine brushes for wear. If they no longer protrude from the holder they must be replaced. To remove: Lift the retaining springs with a wire hook and pull the brushes out of the holders. Remove the brush leads making sure not to drop screws or lock washers into generator housing.
NOTE:
If the commutator is oily or dirty it can be cleaned with a suitable solvent. If it is scarred or burnt disassemble the generator and recondition it. If the brush springs have to be replaced or the commutator has to be repaired, the generator must be removed.