One thing we don’t see a lot of talk about on the forum is chassis lube, lots of topics about oil changes and trans fluid, even more about coolant .
Greasing the king pins is a reallly important item.. the number of busses I’ve seen where the top zerk is not even visible is scary indicating it’s not been touched in ages.. king pins are prone to a lot of dirt being where they are located , dirt inside the king pin bushing acts like a grinder and will eat through the soft bushing and into the knuckle itself wallowing it out.
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