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Inspection and Maintenance of Casters

The frame and fasteners of casters should be regularly checked for distortions, loose bolts and nuts, and broken welds or deck boards. Where rigid casters are used, they should be inspected for bent caster horns. Wheel surfaces must be checked for chemical damage and tread wear. Flat spots may indicate foreign material, a loose caster or a frozen wheel, requiring the wheel to be replaced. Swivel assemblies should be regularly checked and replaced if they are loose. If they don’t turn freely, bearing raceways should be checked for corrosion or dirt. Secure fastening of the king bolt nut should be verified

If no self-lubricating bearings (stainless steel with PTFE bushing) are used, wheel and swivel bearings should be lubricated every six months; while lubrication of bearings in corrosive environments is required once a month. In the food industry where the lubricant is washed away by daily cleaning, lubrication is sometimes even required after each washing. Single seals used to contain oil or grease in bearings will wear, ultimately allowing leakage. Therefore their integrity must be regularly checked, and their replacement at defined maintenance intervals is required.

 
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