The Stovebolt Site Forums The Parking Lot Tons 'o Fun 1 ton king pin replacement

I purchased ACDelco king pins for my 1 ton. Part Numbers 45F00132/88911817 which are .010 oversize. I also bought the same kingpins 45F00134/88911818 which are .020 oversize.

I supplied them to a local shop and they indicate that the standard set, not oversized is the only one they can install.

I believe the ACDelco 45F0013/88911816 is the standard size.

I thought when these were replaced, that reaming them oversize was the proper way to go. Am I missing something?

You might be.

The “oversize” is kingpin diameter which is to fix a worn out of round and or oversize hole in the axle beam.
This usually is not an issue, but the oversize kingpin kit is the solution if so.

Normal procedure is standard kingpin if it still fits properly in the axle beam.
The new bushings in that kit will not fit the pin without reaming. They’re reamed to fit the pin after being installed in the spindle. This way, if done right, they’re reamed with same centerline.

Proper fit of clean parts is light press fit of kingpin in axle, might push it in with your palm, possibly a few whacks with rubber mallet.
Kingpin fit in bushings is free enough to push in with your thumb, ideally shouldn’t fall out on its own.

Thanks!

i got new standard pins and bushings for my daily driver (the original king pins are quite worn, the whole hub can giggle a bit)
according to the service manual, a copper drift and small hammer should be sufficient to push the pin out.... haha funny book

removed the axle from the truck, removed all brake parts and bearings, put it all in a 20 ton press, the king pins are frozen in place, tried hammering a bit with a steel punch, but am concerned the pins will begin to expand.
gave up, put is all back together fixing up the steering linkages and springs and brakes during reassembly, still have giggly wheels tho.

one day i will get an oxygen lance for a different job on my tractor, and i'm hoping to be able to burn the pin out from each side, then i can focus on just the frozen stub of the pin in the center hub assemblies.
-s

Beating on kingpins either works easily or is a bad idea.
It’s not uncommon to bend the axle and change camber angle trying to remove a stuck kingpin.

If it’s stuck taking the axle to a press is the right idea. If still no luck then keep pressure on it and warm the axle eye with an oxygen acetylene torch, should do the trick.