In the replacement of brush dc motor controller from time to tome what considerations? Below small make up take you to understand it. 1. Due to the different types of brush, the hardness and the current density is different, so should choose the same type of brush. 2. When change the double brush, attention should be paid to the order, cant agree, prevent influence brush to beat the reversing. 3. Need to put the new brush grinding into the radian of the old brush size. 4. Hold good pressure adjustment of the brush, and brush size appropriate, not too big or too small. More than when these points are replacing brush dc motor controller should pay attention to some things, hope to help you.