worn out front end at 28k?

[hugger6933]

Got the freebie C60 around out of the grass this morning to work on the brakes. We are gonna use this truck to haul off our scrap metal from the wrecks we build andd boy does it pile up quickly. When my bro-in-law gave me the truck[plus my sister gave me 300 to move it!] the brakes were soft from setting in the barn as they will do. So I have decided to add a 2 circut master cylinder and rebuild all 6 of the w/c's and new rubber brake lines as well. We jacked the truck up and the rh front wheel was just a floppin. the king pins are worn oput. The truck has only 28,300 miles and I think that is a little low miles for that to be worn. any thoughts as to why or ideas why?