Axles should be greased at least once of twice per year. It depends on the frequency of use of your trailer, the way you use your trailer and, if it is a boat trailer, whether it is in salt or fresh water. Karavan Trailers uses a Sure-Lube grease system. Your Owner's Manual details the benefits of this system, and how to change the grease in your axles.
How often should I grease the axles?
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