Inspect/Replace

The grease for wheel bearings should be smooth textured, consist of soaps and oils, and be free of filler and abrasives. Recommended are lithium complex (or equivalent) soaps, or solvent-refined petroleum oils. Additives could be added to inhibit corrosion and oxidation. The grease should be noncorrosive to bearing parts, with no chance of separating during storage or use. Using the correct amount of lube is also essential. Failure to maintain proper lubrication might result in bearing damage, causing a wheel to lock.

To lubricate a bearing, force grease around the outside of the bearing and between the rollers, cone, and cage. Also pack grease into the wheel hub. The depth of the grease should be level with the outside diameter of the cup.