The general overhaul procedure is covered in the Magic Ring writeup, so this is just some notes on a Roller Derby.

Overall, the internals of this machine were pretty good. No rust, not a huge amount evaporated oil coating everything and quite a few of the wires had almost identifiable colors.

Many of the stepper units were also pretty clean, with the white plastic ratchet actually looking white. I still removed all the wipers and cleaned/lubed the contact plates, even on units that stepped up/reset freely.

The next few pages will look at various problems found.