Symptoms When one of the four wheel bearings of the vehicle is damaged, you will hear a continuous hum-bum-hum sound in the car when the car is running. The cabin is full of this kind of humming sound, and the faster the speed, the louder the sound. Generally, a slight humming sound can be heard when the speed is around 60km/h, and it is obvious when the speed is 70 and 80km/h. When talking in the car, you should raise your voice. At this time, there is a fine vibration feeling on the soles of your feet. These are just the superficial phenomena of the fault. If it is the first time you encounter it, you really don’t understand what’s going on. Let’s talk about the method of judging this fault. Judgment method Don’t panic when you hear this buzzing sound while driving, keep calm and continue driving, and use these methods to roughly judge the source of the sound. ① Open the car window and listen to whether the sound is coming from outside the car ② After increasing the vehicle speed (when the humming sound is louder), put the gear in neutral and let the vehicle coast, and observe whether the noise comes from the engine. If the humming sound does not change when coasting in neutral, it is likely that there is a problem with the wheel bearing ③ Temporary parking, get out of the car and check whether the temperature of the wheel axle is normal. The method is: touch the four wheel hubs with your hands, and roughly feel whether their temperatures are consistent (when the brake shoes and disc clearances are normal, there is a difference in the temperature of the front and rear wheels. Yes, the front wheels should be higher), if you feel the difference is not big, you can continue to drive slowly to the maintenance station ④ Use a lift to raise the car (release the handbrake and put it in neutral before). If there is no lift, you can use a jack to lift the wheels one by one. Manually rotate the four wheels quickly. When a problematic axle is encountered, it will make a sound. It is completely different from other axles, and it is easy to tell which axle has a problem with this method ►If you have accessories, you can directly replace them to troubleshoot the problem. What if you don’t have accessories? Then you have to drive when you are sick. Let me talk about the precautions when driving. driving precautions In fact, there is nothing to say about this, just follow the normal driving method and follow the traffic laws when driving. But one thing to be careful about is to keep driving at a low speed as much as possible. The purpose is to prevent the temperature of the damaged bearing from rising sharply due to excessive speed, which will eventually cause the axle to lock up and the vehicle to skid.  

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