Stick to bucket bushing removal on a CAT 301.8

Hi All,

looking for a bit of advice on how to get the lower stick to bucket pin bushings out on a 301.8

I got the stick to bucket linkage bushing out without much issue using a industrial ball joint press and a small slug of flat bar slipped it in from one side against the inside of one bushing and just pushed it out with the press, took all of 30min to do both.

then I got to the lower bushings and it seems as though the bushing is seated against a shoulder and there isnt enough exposed to push it out the same way.

Is there some sort of trick to getting them out? at this point I am almost ready to resort to a carbide cutter in a die grinder and just cut then out, but I dont want to damage the bore in the process.

also when I ordered my replacement bushings the parts guy didnt say anything about a seal on these, but when I took out the top 2 there is what looks like a metal seal of some sort. The parts drawing I have doesnt show anything there so wondering if someone with access to the specs could help me out.
machine SN is BFA01712

Thanks!
Paul