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1941 JD B Fanshaft oil leak

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Scott Rong

12-16-2001 19:11:48




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Hi I have my fanshaft removed, and prior to removal it had a nasty oil leak at the govenor end. After removing the tube and looking at the manual I noticed I was missing a rubber O-ring. Is this what is missing to keep me from having such a nasty oil leak? I have not yet pulled the fanshaft out of the govenor, that is planned for this week. If anyone can give some heads up information I would greatly appreciate it. I know there are paper shims in there I have to be careful about, but I am open for more information. Thanks in Advance.

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Will P

12-17-2001 17:56:14




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 Re: 1941 JD B Fanshaft oil leak in reply to Scott Rong, 12-16-2001 19:11:48  
Like Clooney said, it is fun to put in. You can get a new one from Deere. I did in June. Cost under $10.00 I had a bad leak too. Now it is dry as can be. I heated mine up in a pot of water. Made it a little more flexible. Be carful when you put the tube in the casting that holds the O-ring. You don't want to hurt the ring. Do you know how to take the fan shaft apart? I couldn't figure it out and asked the board. This place is great.

Good luck, Will P

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Clooney

12-16-2001 19:37:54




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 Re: 1941 JD B Fanshaft oil leak in reply to Scott Rong, 12-16-2001 19:11:48  
Scott, look closely (very closely) & you will probably see a black strip inside the rear fanshaft tube bearing housing & that is (or used to be the "O" ring). It should be replaced & will be a real pain to install, wait until you try & you will see what I mean. You are correct, those gaskets are really shims so save them to match up the height with new ones.



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Mike Whitman

12-18-2001 06:13:37




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 Re: Re: 1941 JD B Fanshaft oil leak in reply to Clooney, 12-16-2001 19:37:54  
I have the same leak on my wife's 1939 B. Do you think I could split an O-ring and push it in between the casting and the fan shaft tube for a temporary fix ? If not, was is the simplest method of disassembling ? Do I need to have the fanshaft gear pressed off ?

Thanks for any insight,
Mike



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Clooney

12-18-2001 07:54:53




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 Re: Re: Re: 1941 JD B Fanshaft oil leak in reply to Mike Whitman, 12-18-2001 06:13:37  
Mike, I doubt you could even attempt to get an "O" ring between the tube & casting. They barely go back together when the "O" ring is in the deep groove in the casting. You can do it without pulling the rear gear as the fan shaft will come out of the tube by removing the fan & ft bearing/cup & big spring. You will probably either have to move the radiator forward or pull the governor up & back to get the fan, shaft & tube out. Then re-time the governor/mag drive when installing (a real pain) plus if the gasket is ruined (a good possibility) the governor will have to come all the way off (an even bigger pain). If you could manage to get ALL the oil cleaned from that tube/casting joint (doubtful) you might be able to work some sealer into that joint with a thin piece of feeler stock.

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Mike Whitman

12-18-2001 08:25:22




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 Re: Re: Re: Re: 1941 JD B Fanshaft oil leak in reply to Clooney, 12-18-2001 07:54:53  
Thanks Clooney,

I want to fix it correctly I just don't have the time right now.

Sealer (silicone ?) - I have a neat trick that I use to get sealer into tiny places. I don't know if anyone else does this but an "oral irrigator" can inject sealer into the tiniest of spots (including thorn holes in tires). An "oral irrigator" is a plastic syringe (?) designed to spray water into various dental work (particularly extractions Ouch!!!). I use it routinely to fix tiny holes in tires and haven't had one leak yet. It beats making the hole bigger to accept a tire plug.

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