Wheel bearings work in two important ways with a car’s suspension. The wheel bearing lets the car wheels rotate with little effort, also they are supportive of the car’s weight. To do the job correctly, the wheel bearings should be in mint condition. The seals should be leak free to keep the lubricant within the bearings and contaminants out.The bearings are only in trouble if the seal begins to leak. When a grease seal is damaged, this allows grease to leak out from the bearings, so that dirt and water can seep into the bearing cavity. If seals on a sealed bearings assembly begin to fail, you can’t replace the seals individually; therefore the whole hub assembly has to be replaced.
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