JH.... Usual trick with bushes in alloy is a little bit of heat. My preference in Summer is the gas barby, Winter (when SWMBO is absent) it's the domestic oven. Nice and hot 'til spit dances, a gentle tappy-tap on the bush with a well supported casting and out they come. Meanwhile put the new bush in the freezer beforehand for a couple of days. The less violence on these fragile neolithic castings and bushes the happier they are. Ice cold bush, hot casting, easy replacement.
Now you know how the other half lives. Piston pins....easy out with a hot air gun. Murder tight PRV ?... use a good fitting socket and again the hot air gun, not the ill fitting open-ender or worse, the hammer and drift.
So somehow the bush and shaft don't match. If you have one, try an oilstone on the shaft end, it's much gentler than going at it with a file. Removing the bush as suggested will enable easier access to rectify any deformation, it is not such a critical bearing but even so may require replacement depending on the type of damage.
If you are sure the quadrant is correct, grinding away that first molested tooth to the original start profile a la bergs is an option.
Swarfy.
