How to check the wear of hub bearings. Check the wheel bearing

Mixing during movement of the machine to the usual noise tires unpleasant low-frequency rumble — signal the need to check the wheel hub bearing.

2015-11-17 06:54:58 112

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Mixing during movement of the machine to the familiar noise of tires unpleasant low-frequency rumble — signal the need to check the wheel hub bearing.

What are the dangers of a faulty hub bearing wheel

If the buzz appeared to ignore and not to take any action, it will be amplified so that the noise, in addition to the driver, would pay attention and passengers. In addition to the discomfort arising from the increased noise, wear of the hub bearings is dangerous because the one (far from perfect) day now-familiar hum will be replaced by a loud crackle and a crunch. Destroyed the bearing will jam the wheel hub, resulting in failure of a spherical support of the lever of a suspension bracket and the deformation axis. About the consequences of such failure when driving at high speed, it is better not to speak.

Reasons for a bearing failure

The bearings have high degree of reliability even in the most severe conditions, however, despite claimed pretty good resource for the wheel bearing, the main part fails after the mileage at 100,000 km. There are several reasons: the poor state of our roads, which entails an increased load on the entire suspension and wheel bearing in particular, natural wear of the bearing due to the normal process of fatigue, poor lubrication and poor compaction, improper installation, and an associated excessive tightness in the fit.

How to check the wheel bearing

As already mentioned, a faulty bearing pretends to excessive noise during movement of the car. To more accurately determine the condition of bearings of naves of wheels, you can do turns left and right. During the left turn is the roll of the car body to the right side. Most of the load falls on the right wheel, the left; on the contrary, is unloaded. If at speed of 10-15 km/h with a relatively sharp turn of the steering wheel to the left the sound disappears, then it is the left wheel, or the bearing hub. If the noise disappears when turning the steering wheel to the right, a faulty bearing in the right wheel. For more exact diagnostics it is necessary to lift the car lift or hang it up using the Jack. Next you should run the engine to "drive" the car on 4th gear until a speed of 70-80 km/h, squeeze the clutch, to turn off the transmission and leaving the car, at the hearing to determine the wheel — the source of the noise. If the wheel is not leading, it is possible to spin by hand. After wheel stop, you need to take one hand at the top and another hand at bottom of wheel and try to wobble it in the vertical plane. The presence of even slight wobbling of the wheel right will indicate the wear of its bearing. Just check for the existence of backlash of the wheel in a horizontal plane, holding hands on his left and right sides and trying to wobble it. Sometimes the backlash of the wheel can be caused by faulty suspension parts or wear in the steering system. You should ask the assistant to press the brake pedal and himself at this time to try to shake the wheel in a vertical plane. If and when the brake pedal is applied, the backlash had left was his cause is to be found in the suspension. If the backlash has disappeared, it is definitely a cause of wear of the wheel bearing. Remember, I wheel with a proper bearing any backlash should not be. The diagnosis remained to drive away the car to the car wash or one HUNDRED, entrusting the replacement of the wheel bearing specialists. If there are skills and special tools this job can be performed independently. The main thing when performing is to keep clean, to correctly set the clearance when installing tapered bearing, avoid the use of sharp tools that can damage the seal, when pressing the bearing into the hole the force through the mandrel to transmit it to the outer ring, and when mounted on the axis of the mandrel to act on the inner ring. Good luck to you! No nail, no wand!

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