Hi guys!
I just completed a blower clean and adjust project. It is the small one like pictured in the top post (eight inch fan on a 401 forge)
I could not remove the fan from the shaft! I pulled the locking nut off (impact gun and 1" deep-well.... right handed threads) but no way to remove the fan. The fan hub is threaded onto the shaft.
I made a socket that will fit over the hub of the fan and I used an impact gun to knock it loose. Worked perfect. I really need to patent these!!!!
Once you have the fan off, the dust cover comes off, then there is a backing nut behind that. It locates the fan/dust cover on the shaft.
Then the threaded cap is removed from the gear case to expose the bearing balls and the adj cone.
Don't mess with tryuing to remove that cone and it's locking nut. It's really simple............remove the REAR bearing locking nut and cone. Drop out the bearings here (eleven of them) and then pull the shaft from the front. The front bearings (thirteen balls) will follow.
To get a damaged part, one would have to buy another gear case. I HAVE seem them on e-bay (gear case only) and all the 400 gear cases are the same for the most part. Some very slight differences.
The fan shaft willnot hold oil. if you look at the shaft, one would soon discover why.............
That shaft is THREADED and, it has a key-way groove cut into it. Little wonder it won't seal oil.
Here is a link to a guy who rebuilds these. I dissassemble them differently than he does. He fights with that fron bearing locking nut and cone while inside the case. I don't like to. I remove the rear most bearing as it is much easier to do so.
http://www.practicalmachinist.com/vb/antique-machinery-history/help-please-champion-blower-113740/