Kingpins can take a lot of force to get out. The best method is to remove the axle and use a press. If you pound them out with a sledge, you can deform them and cause damage to the hole in the axle. Ask me how I know!

1951 GMC 1 Ton Flatbed -- It is finally on the road and what a great time I have driving it!
1951 1 Ton Completed

My Chevy Master 4 Door is on the Road!