How to check drum brakes?
Listening to the sound, if there is a "iron rubbing iron" sound when you tap the brake lightly (it may also be the effect of the brake pads running in at the beginning of installation), the brake pads must be replaced immediately. Because the limit marks on both sides of the brake pads have directly rubbed the brake disc, it proves that the brake pads have exceeded the limit. In this case, when replacing the brake pads, it is necessary to cooperate with the inspection of the brake disc. When this kind of sound occurs, the brake disc is often damaged. In severe cases, the brake disc needs to be replaced.
