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Farmall & IHC Tractors Discussion Forum
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M rear end

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Roger

06-09-2004 14:40:19




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I have the rear end apart on my '47 M, what started all of this was last year I changed rear end oil & as I was flushing it out with diesel fuel I found some metal fragments & they looked like the part of a ball bearing that keeps the ball spaced apart...This afternoon I removed the right axle & bearings & all looks ok, one thing I noticed, is the outer bearing supposed to have a seal on one side to keep trans oil out of the bearing or was there changes made that let oil into the outer bearing? this one is open on both sides.... I am wondering if the scrap pieces were left in there from a previous repair or if I should keep digging to see if everything is ok in there now, I would hate to have to go back in later if there is a problem in there now. One more thing, in the oil troughs on both sides of the front compartment there are filings almost ready to get into the differential bearings, would the filings go right into the bearings or would they go into the gear teeth first?

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RPM

06-11-2004 06:53:35




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 Re: M rear end in reply to Roger, 06-09-2004 14:40:19  
If you plan on keeping the tractor and using it it needs to have all the axle bearings checked and the brake shafts (bull gear pinions) bearings, these are all ball bearing and they will fail, seen it happen many times, if you dont a loose ball will get into the brake shaft gear teeth and the bull gear, it just makes a mess, I worked at a IH dealer from 1960 till 1992 and this was a common problem.

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Roger

06-11-2004 07:04:52




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 Re: Re: M rear end in reply to RPM, 06-11-2004 06:53:35  
RPM, all the bearings have looked fine so far, I'm still thinking the pieces I found are from a previous repair, I dont know why anyone would leave that stuff in there, that would be asking for trouble later. The only thing I've found is grooves in the right brake drum from where the oil seals run, hopefully a speedy sleeve will fix that



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randy hall

06-09-2004 20:32:28




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 Re: M rear end in reply to Roger, 06-09-2004 14:40:19  
the proper outside axle bearing is a shielded on one side bearing. the shield holds most of the grease in the bearing but lets the excess fall into the axle housing.



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Dave W V

06-09-2004 18:27:52




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 Re: M rear end in reply to Roger, 06-09-2004 14:40:19  
Roger,i think it was in 560 production period
that IH changed cap and bearing.In later years
if IH sold you a bearing or cap for a M it would
be open bearing and cap without grease fitting.
Bearing could be changed without cap change.



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Haas

06-09-2004 17:49:27




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 Re: M rear end in reply to Roger, 06-09-2004 14:40:19  
I could be wrong, but I don't believe there is supposed to be a seal on the inside of the outer axle bearing. My best look at the parts catalog does not show one. The only seals I see are on the outside of the bearing, a seal and a felt washer. These seals of course are in the outer axle housing cap that is attached to the axle housing with 4 cap screws. On the C and similar tractors, there is a seal at the transmission housing to keep oil out of the axle housing.

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Roger

06-09-2004 18:02:22




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 Re: Re: M rear end in reply to Haas, 06-09-2004 17:49:27  
Haas, that's what I found, an open bearing & a rubber lip type seal & a felt in the cap. IF the oil can get to the outer bearing, why the grease zerk in the cap?



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Haas

06-10-2004 05:34:46




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 Re: Re: Re: M rear end in reply to Roger, 06-09-2004 18:02:22  
Don't know why the grease zerk, except that the oil level in the transmission is barely high enough to wet the bearing. If running on the side of a hill, the up hill side might not get enough oil.



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CNKS

06-09-2004 18:28:56




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 Re: Re: Re: M rear end in reply to Roger, 06-09-2004 18:02:22  
I believe the idea of the grease is to flush out dirt, and keep it away from the seal, as the felt may not keep all the dirt away from the seal. Also will help lubricate the seal--anyone have other ideas?



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Aces

06-09-2004 15:54:59




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 Re: M rear end in reply to Roger, 06-09-2004 14:40:19  
Roger I would take it a part and clean it out the stuff you found could have been left in there but sounds like you got filings in there bad. As for the outer bearing they should have had seal on in side because grease fitting in cap, after all these years any kind of bearing could be in there some people used what they could get there hands on.



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