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Farmall & IHC Tractors Discussion Forum

M input shaft

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02-21-2013 18:17:05

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Hi all, I am a mechanic by trade but not very knowledgeable on old iron so I hope you can help me out. I have my 46 M in 1/2 right now with the engine on the stand. It started with a broken cam gear so naturally I had to break the tractor in 2...I have learned that that"s how it goes with tractors. Anyhoo, I found that the aluminum throw out sleeve is broken and the input shaft is "loose". It think it is designed to have some play like a coupler but I am wondering how much is normal? the pilot bearing is fine and the wear pattern on the clutch/pressure plate looks ok, just not sure why that sleeve broke. Any help would be greatly appreciated, Thanks.

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02-21-2013 18:44:26

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 Re: M input shaft in reply to minncraig, 02-21-2013 18:17:05  
The clutch shaft is coupled to the trans input shaft with a Ujoint like coupling. THat would allow the clutch shaft to wiggle. It is not to have play in it, it is not designed to have bearings, but tapered sleeves and special bolts. The trans input shaft should not have play. The Bearing pilot was probably damaged in a clutch "event" . Jim

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02-22-2013 20:14:46

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 Re: M input shaft in reply to Janicholson, 02-21-2013 18:44:26  
Thanks, that's what I suspected for the input shaft. It seems like it is as designed but it is so different than what I am used to looking at. I have had this tractor for 7 years and I know the guy who had it before me had it for about 10, he never worked it beyond a baler and a hay wagon so whatever it was that broke that sleeve must have been a long time ago. Thanks again for the answer.

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