I have over 75K miles on my 10,000lb. Blue Ox.
Last fall while visiting friends in Omaha,Neb. I drove to the Blue Ox factory in Pender,Neb.
They gave me the option to either replace my tow bar or go thru a major rebuild. I had the seals and bushings replaced every two years prior.
I opted for the rebuild and the next day they delivered the tow bar to my campsite. Cost was $300, but it looked and performed like a new unit. I was happy and the rebuild was much less than a new tow bar.
Blue Ox has a nice 25 space campground, with FHU. I also got a tour of their factory.