The king pins on both sides had a lot of play, so I opted to replace them as well. To remove a king pin, I first removed the lock pin which was held on with a nut. Next, I removed the upper lock rings, and the 4 bolts which hold the hub on—heads on the hub side. The bottom two bolts use cotter pins. The top ones use lock washers on the nut side. The bottom 2 use flat washers on the head side, but top two use spacers on the nut side, between the knuckle housing and the hub.