I've had mine serviced a couple of times and did the service once myself. Most tow bars have multiple metal and plastic spacers in the center joint. They take that apart, clean the tow bar and replace the spacers. It's then retorqued to the correct specs, tightening everything up.
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Don & Mary
2019 Newmar Dutch Star 4018 (Freightliner)
2019 Ford Raptor
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