Sodium based grease is not compatible with lithium based grease. Read the package labels and be careful not to mix the two types. If there is any doubt as to the type of grease used, completely clean the old grease from the bearing and hub before replacing.
Before handling the bearings, there are a few things that you should remember to do and not to do.DO the following:
Remove all outside dirt from the housing before exposing the bearing.
Do NOT do the following:
Treat a used bearing as gently as you would a new one.
Work with clean tools in clean surroundings.
Use clean, dry gloves, or at least clean, dry hands.
Clean solvents and flushing fluids are a must.
Use clean paper when laying out the bearings to dry.
Protect disassembled bearings from rust and dirt. Cover them up.
Use clean, lint-free rags to wipe the bearings.
Keep the bearings in oil-proof paper when they are to be stored or are not in use.
Clean the inside of the housing before replacing the bearing.
Do not work in dirty surroundings.
Do not use dirty, chipped or damaged tools.
Do not work on wooden work benches or use wooden mallets.
Do not handle bearings with dirty or moist hands.
Do not use gasoline for cleaning. Use a safe solvent.
Do not spin dry bearings with compressed air. They will be damaged.
Do not use cotton waste or dirty cloths to wipe bearings.
Do not scratch or nick bearing surfaces.
Do not allow the bearing to come in contact with dirt or rust at any time.
The rear wheel bearings require periodic maintenance. Use a suitable premium high melting p