The brake drum is hot. Normally, long use of the brake will cause the brake drum to heat. If it is not used for a long time, it means that the brake drum may have local friction failure.
The following symptoms will also occur when the brake drum is broken:
Brake failure; When braking, the brake drum makes abnormal noise; If the brake is pressed, it will get stuck and will not return; The brake cannot return, and the pedal cannot spring back automatically. You need to hook it back with your foot, or press it twice again to spring back. The brake becomes soft. When the brake is pressed to the bottom, the braking distance is much longer than usual. When parking, the direction deviated, and the brake was deflected. At this time, the brake drum may be broken, and it needs to be replaced.