Flathead fan?

I took apart my fan****embly on my 8BA because I could see fluid and dirt built up on it . I'm pretty dumb when it comes to flatheads. Any way what type of fluid do you put in the fan hub?

 

I think none unless it has an oil cup. The fans on '49-'53 passenger cars (and I****ume all the others) are sealed self-lubricating bearings. I don't know about trucks, but it would surprise me to find they were any different. I also don't know about earlier fans that might have snuck its way onto a later motor.

 

Assuming you have the oil type hub, the latest I have heard is 80 weight rear end lube. Just enough to be level to the fill hole when it is horizontal.

 

Mine has just regular motor oil in it.......not sure if thats 100% correct but have not had one problem for several years since I had it apart to change the fan.

 

I use an 8RT big turck fan, it takes 30 SAE motor oil.

 

Thanks for the help! I couldn't find anything in my Motor Manual on it at all.