OldNuc, That would explain the stuff I pulled out of the 5U main. It looked like graphited water pump packing. Whoever did it did it right. It was very solid and quite neatly folded as it was put in. May have been the original factory job.
Crank shaft seals were made from 100% cotton balloon rope properly greased and graphited in later days. Installation was not easy. There is more rope that slot to put it in. They last forever and cause minimal shaft wear.