Generator pulley 59 for a fan bolt om

[ndnchf]

Originally Posted by Tim Ayers

I've tried to follow, but what am I missing? Early generators that had the fan on the front used two small, Timken-style bearings and millions were made this way and used successfully in cars.

The move to removing the fan from the generator and then Ford went to using a sealed bearing in the two brush generators.

So I understand, the two brush style can't handle a fan without upgrading the bearing in the front? Isn't a sealed roller "technically" stronger than a Timken-style bearing?

I don't know all the answers, Ford had a bewildering variety of generators. It hurts my head to try to understand them. That being said, my understanding is that in 1938 they went to the large 6303 bearing in 3 brush and the soon to arrive 2 brush generators with fan mount pulleys. The 2 brush has a larger generator body, so there are different size front fork plates. The photo shows the larger 2 brush plate on the left, smaller 3 brush plate on the right. The other photos shows the bearings. On the bottom is the multi-part double roller bearing used 1932-1837, in the middle is the large 6303 bearing used in 1938-1939, at the top is the 6203 bearing used afterwards for non-fan mount pulley generators. There are many other variations. But this is a general overview.