What are the causes of a generator carbon brush failure?

[ArthurRose]

Generator carbon brush failure is caused by: 1. Contamination on the surfaces of the slip ring, carbon brush, brush holder, and brush frame; 2. Sticking of the brush holder edges or uneven spring pressure; 3. Excessive vibration in the unit's shaft system, causing the slip ring to vibrate as well. The solutions for generator carbon brush failure are: 1. Completely remove the burnt mica, eliminate grounding faults, fill the groove with asbestos thread, compact and smooth it, then continue using; 2. If the diode is damaged, cut its lead wire or replace the diode; 3. If the carbon brush is broken, remove it, shape the carbon rod from a dry battery into a carbon brush shape, cut a small groove at the top of the carbon brush, wind a wire around it, and use it as an emergency measure; 4. If the pulley is loose, insert hard objects such as iron wire into the half-round key to tighten the pulley and shaft, securing the pulley.