How do you press out old king pin on 3100 Chevy truck I tried hamer and drift not much luck?

To press out the old kingpin on a 3100 Chevy truck, first ensure that the axle is securely supported and the kingpin is properly exposed. Use a hydraulic press if available, as it provides the necessary force to push the kingpin out more effectively than a hammer and drift. If you don't have a press, consider heating the area around the kingpin with a torch to expand the metal, which can help loosen it. Additionally, applying penetrating oil can aid in breaking any rust or corrosion that may be holding the kingpin in place.