If the brake drum sounds during use, it must be stopped in time to check the causes to avoid unnecessary damage:
1. When manufacturing, the hardness of the brake drum is different, which will lead to different degrees of wear, but it will not have too much impact;
2. If the abnormal noise is heard in the cab (brake pedal), it may be that the nylon bushing on the brake pedal fixing bracket is worn off, and the brake pedal fixing pin makes a noise when rubbing against him;
3. The brake drum is seriously worn, and the direct contact of iron parts will also cause the drum to sound.
It should be caused by rust on the brake wheel cylinder or poor lubrication of the wheel cylinder pin due to lack of oil, which cannot return to the original position after being stuck, and the brake disc is slightly rubbed all the time. You can check whether the components are replaced or the lubrication is restored. Brake drum drumming This may be caused by improper assembly or other faults (such as brake pipe or brake rust).