1. I know that the Ford Fan Bracket Bolt #3968 had a cotter pin hole in it from 1909 on.
I found the lower one in my bolt drawer. It is shorter and has no hole. The shoulder diameter, length and thread size is the same even though the photo makes it look larger. Could it be a bogus part from an after market supplier? Has anyone else seen these?
2. What was the material used to seal the grease cup from its housing? #3970 It acts like hard rubber after 40 some years. Has anyone used leather here with any luck?
Richard, It was a fibrous type of material, and may well have been leather. The hardest part will be getting the upsets which hold whatever it was in place, bent back enough to install new material.
Allan from down under.
I'll have to check the early grease cup next time I go to the archives. The ones on my '13s are solid brass, and the flats a somewhat longer than the steel ones, and yes, it appears the seal is made of leather. I've never tried it but I wonder if you scraped out that area if a small O ring could be stretched over that area?
In the mean time I made a seal out of an old inner tube. Once trimmed to the right OD it seems to seal good enough.