The stained little bit of lubricant between two fingers friction, if the contaminant is feeling out; coated with a thin layer of lubricant in the back of the hand, and then seal ray examination.
Then, is to replace the wheel bearing lubricant.
Use oil lubrication of the wheel bearings, if you can, then in addition to the old oil spilled, it should be re-poured fresh oil and let the machine a few minutes at low speed rotation. As much as possible so that the oil collected the remnant contaminants, and then spilled addition to these oil. Note: Oil is best to use filtered. Joe addition to replacement of grease, the use of grease lubricated bearings should be avoided with cotton material then angle to the bearing of any parts. Because these residual fibers may be wedged in between the rolling elements and damage, especially small bearing should pay more attention to this problem.
Exercise time, vibration and noise to maintain a certain level, single spectrum appears only one, second harmonic. Very rare triple-frequency spectrum above roller bearing condition is very stable, to enter stable work period.
Continue into use late run, bearing vibration and noise begins to increase, sometimes a different tone, but the change of vibration increases more slowly, and this time, angular contact ball bearing kurtosis values began suddenly reaches a certain value. We believe that, at this time the bearing that showed initial failure.
At this time, it requires close monitoring of the bearings, pay close attention to its changes. Thereafter, the bearing kurtosis value decreased rapidly, and close to normal, while the vibration and noise begins to significantly increase, the increase began to accelerate its bearing kurtosis values also began, when the vibration exceeds a vibration standard (such as ISO2372 standard) The rapid increase, when both exceed vibration standards, and kurtosis values than normal (relative standard available kurtosis), we believe that the wheel bearing into the late failure to produce timely maintenance equipment, replacement of bearings.
Bearing showed late failure characteristics to a serious failure (generally bearing damage, such as axle, burns, sand frame Spallation raceway the beads wear, etc.) time it tends to be more than a week, the greater the capacity of equipment, the faster the speed, the The shorter the interval. Therefore, the actual bearing fault diagnosis, Once advanced fault feature is found, should be decisive judgment defective bearings, arranged as soon as possible overhaul.


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