Crawl under the trailer, there are tags on the axles that give the date of manufacture. If they are original, chances are they will need replacement. I just replace the axles on my 26' Argosy and much to my surprise when I removed the old axles. I found that they were 4 years older than the trailer. Date of manufacture on the axles 1970, the trailer is a '74. And I am 99.9% sure they are the original axles installed. When I contacted the original owner he said the axles had never been replaced. I am the 2nd owner of this trailer. I am not sure how much axles age setting on the shelf but I'm pretty sure some degradation takes place.
Knowledge: "A gift to be shared. A treasure to receive."