Maybe this is a silly question, but in the guide to the 32-day clock, it is indicated that if you have 623RS bearings, the rubber seals should be removed. Why is this? Do I just stick a pin into it and try and pull it out?
OK, I opened them up and then wondered how the heck I was supposed to clean them. Then I saw this video:
Is that what you did? Soak them in degreaser and then try and blow them with an air pump through a ball needle?
The rubber seal needs to be removed to clean out the factory grease to reduce friction as much as possible. The factory lube is often way too thick for use as a clock bearing. These bearings are being used at significantly lower speeds and loads than the maximum limits. They are fine to run dry. A very light oil or Teflon lube can be added to help prevent rust.
Yes, the rubber seals are removed by sticking it with a pin and prying it out.