Does anyone know how to take the main shaft out of a 75# Fairbanks? I am taking the hammer all the way apart, and at this point, I see the end of the shaft on the front with a key in it at the flywheel. Do you bump the flywheel off from behind with a hammer, and then how do you remove everything else from the shaft?
I am thinking about having a longer main shaft made to mount the motor down behind the hammer on the floor. Anyone ever try this?
There are no patent numbers on my 75#.
Have you checked the front and rear shaft bushing play? Sid and Keri (Little Giant) had me check first. Keri told me if the play was 0.025" (twenty five thousanths) or less, to leave it alone and run it on a good and frequent grease supply... heavy grease is good as it stays in better. Anyhow, a magnetic base with adjustable indicator holder and indicator will tell you if you need the following link. So you know, you need to check play both up-down and left right... the hammer end throws left-right and you may find more wear in that direction than up-down.
The key is a gib key. There is a tool to remove them... see index, right side, Gib Key Puller... spend some time putting WD-40 or equivalent on the gib key before hand.
http://www.hitnmiss.com/index.html Our hammer is one of the self motored types... "L" shaped motor mount on back. You should see two 3/4" treaded holes low down on your machine (if it was made after the "self motored" concept came in). You may be able to move the drive pulley to the rear position. It would require a sleeve between the bearing yokes (ours has two threaded holes with bolts to position it). Would also need a gib key slot in the drive pulley... would fit on with recess for brake shoe facing towards the hammer end. Bruce "birdog4" has one configured like yours and will know how your hammer positions the drive pulley, comes apart, etc., if you can't figure it.
You may be doing this or may have thought of doing this... Sid and Keri (Little Giant) love hammers and they don't care if you own a Little Giant or a Fairbanks or ??? They are very willing to help with about anything you might come up with. They may also be able to put you in touch with Doug Freund and Doug has info. you may find helpful... I did. It helps to own or be willing to buy Doug's books... so you know.
There is another guy, architectural iron worker is his day job, in western Oregon. Name is "Bear". Ask Keri to put you in touch with him. He has two Fairbanks and he uses them every day. I will tell you up front, I like the shit out of "Bear", but he and I do not think the same. I'm fussy and "Bear" is distinctly "not fussy". He builds his own dies with a band saw and angle grinder. When I told him about our shaft play, seriously worn arm holes and pins, etc., "Bear" said, "Just run it... keep plenty of grease and oil in 'er, and run it... you can't wear one out". If you can't stand the idea of approaching things that way, "Bear" will drive you crazy... I love talking with him, though... =]
I don't know that I can be any help to you in this. If you think I may, holler.
Mike