Phenomenon: Brake when the front wheel is similar to the drum of the dense noise, and slow the sound of small, urgent step on the sound.
     Maintenance: Ask the owner that this car has just changed the front wheel brake friction plate, then there will be such a fault phenomenon. Demolition of the front wheel brake found that the friction surface is very uneven, there are many different sizes of pits, it is obviously not the original accessories. As the quality of the friction plate is not qualified, in the friction between the friction plate and the brake disc work, the friction plate surface to produce off the phenomenon, the formation of pits, as noise, estimated pit is the air, between the brake disc and friction plate Of the friction work, due to high temperature, volume expansion, like many of the balloon kept blasting, and then through the body and the suspension of the transmission, to form a similar drumming dense noise (this is their own inference, self-identified lack of theoretical basis ). The friction plate to replace the original parts, the failure disappeared.