Wheel of SKF bearing noise fault phenomenon and solutions - bearing knowledge

The wheels of the car appear SKF bearing noise, this seemingly impossible fault in reality it is there, let's discuss together. Fault phenomenon: when the vehicle four wheel of SKF bearing damage, a car on the road in the car you will hear a continuous om - Om - A humming sound, the sound couldn't say for sure where, feel the car is full of such a buzz, and the faster the speed of sound, the greater the average speed from around 60 km/h when beginning to hear the hum of the minor, at speeds of up to 70, 80 km/h when feel apparent, 100 km/h when the car talk to raise his voice, the vibration of the soles of the feet have a close at this time. These are only the surface of the fault phenomenon, if it is the first case is really don't understand how this, talk about the problem to judge the method below. Judgment method: when you hear the buzzing sound in the process of driving don't panic, stay calm to continue driving, with such a few ways to judge the sound source, roughly 1, open the window if listen to the voice came from outside; 2, after the speed ( Hum is larger) Put stall in space vehicles glide, observe whether the noise from the engine, if neutral taxiing buzz didn't change the mostly SKF bearing wheel has a problem; 3, temporary parking, check the shaft out of the car's temperature is normal, the method is: use hands to touch the four wheel hub, the temperature of the general feeling about them are consistent ( Brake shoe, normal clearance, the temperature of the front and rear wheels is a gap, the front wheel to high) , if feel difference may continue to slow traffic to the pit; 4, lift the car rises ( Loosen the hand brake, idling) before , there is no elevator can use jacks one at a time when rising wheels, human fast four wheels, respectively, when there are problems of axle, it make a sound, like nothing else axle, using this method can easily distinguish which axle has a problem. Have parts directly to change can troubleshoot, without accessories? You'll have to take a disease driving, here said the matters needing attention while moving.