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The best way to inspect pivot holes is by putting the pivot in them and then seeing how much the arbor leans in any position. The general rule is if the arbor leans over more than 5 degrees from vertical it needs bushing. The escape wheel is a little more critical, you want just enough freedom for it to turn freely but still keep almost vertical. If you ever service a clock, get it in beat and then you find as it runs it sounds like it is going in and out of beat you will find the escape wheel pivot holes to be the culprit.
Lets hope you have found the problem