1. If the lead wire of the carbon brush is sleeved with an insulating pipe, it should be installed in the insulated carbon brush holder; The lead wire is a bare copper wire and should be installed in a carbon brush holder.
2. When the carbon brush is loaded into the carbon brush holder, attention should be paid to the direction of the curved surface, and the contact surface will be too small, and the power generation will be weak or not generated.
3. The carbon brush should be able to rise and fall freely in the carbon brush holder, and if there is a card phenomenon, the excess part should be grinded off.
4. The carbon brush spring should be pressed in the center of the carbon brush to prevent eccentric wear due to uneven force.
5. The contact area between the carbon brush and the commutator should not be less than 3/4 of the total contact surface, and the carbon brush should not have oil stains.
