My Beseler has worn gears and a couple of teeth are chipped.
I just rotated the gears around so that the chipped teeth are out of phase with each other. No two chipped gears are engaging the rack at the same time. I was lucky enough that the chips were located where I could rotate them to be out of phase.
Yes, it was a PITA to do and, no, it's not the ideal solution but like the OP, that's the way mine was when I got it, third-hand or more. It works well enough, now, as long as I don't horse it too much.