DO you have the flat side of the kingpin facing the hole for the lock-pin?
Does the kingpin have the flat spot for the lock-pin in the center (top to bottom) on the kingpin or is it more toward one end ?
I do a lot of them (kingpins) and do not remember haw each one is machined (I would go nuts eek grin eek

There is enough good in the worst of us and enough bad in the best of us that it does not behoove any of us to criticize the rest of us.
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Be yourself. If you are ever lost, It will be much easier to find yourself if you know who you are!