Repair or replace the electric brush; clean the commutatorsurface by abrasive paper and blow it clean.
修理或调换电刷，用木砂纸清理整流子表面，并吹净。
2
The insulating rubber sealing layer is stuck on the surface of the unidirectional weftless tape banding layer for the commutator. The ring groove is arranged at the end of the commutator plate.