Got some more pics and a couple vids today.
First pic is showing top front frame bore being welded. That's a 10" diameter bore , 8" thiick !
Meanwhile, welder is repairing cracks and cutting out and replacing a cracked fishplate.
Machinist managed to get a 8ft bar in between rear frame bores but a very tricky process. Had to pre install 2 bearing blocks then feed shaft through bottom bore then up through top. Add the 2 end blocks and get things all lined up.
Due to tight space under cab the 8 ft bar is not long enough so after everything was set up he managed to have enough space to remove the long bar and then do each set of bores with a short bar.
If I wasn't a mechanic, I'd love to do this machining work.
This pic he's just setting up the welder which anchors to the rod seen.
He takes a cut, then welds, then cuts again to finished size.
https://youtu.be/93cjfZfTaDU
https://youtu.be/HA6GqR6cBho