1998 379 Peterbilt King Pin Greasing Problem

Are you talking about the zirk?

 

I've warmed zirk fittings with a propane torch and they took grease. Don't burn the truck down, clean the grease off 1st, but it works.

 

Also if the tiny ball at the end of the zirk gets stuck try pushing it easy with an awl BTDT

 

Pull the zirk out and clean the inside also. Use a pick.

It's pretty common if not lubed often enough. To harden up inside there.

 

Hi cindy, It's probably hardened up inside the king pin hole. Since you installed a new zirk.

 

Sounds like time to take apart and inspect that King pin, find what's wrong inside.

 

I would check it for slack though that isn't your problem. If it's time for replacement that would cure the problem all in 1 move. Pull both caps and the jack bolt. Drive the pin down past top of spindle but not out. Lightly hone the crud out of the bushing knock it back up and grease. Old grease will harden and the only way to get it is the old fashioned way.