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Farmall & IHC Tractors Discussion Forum
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Changing PTO shaft H farmall

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Greg Burns

08-09-2006 10:42:16




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I am helping a friend work on a 1939 H farmall. It has the small PTO shaft and it does not work. Can a PTO shaft from a newer H that has the larger PTO saft be put in. Also, when working on the PTO shaft can you do all the work by taking the top plate where the seat is bolted down or do you have to split the tractor in half. Any help would be appreciated.




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Paul G. in Mn

08-09-2006 14:40:50




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 Re: Changing PTO shaft H farmall in reply to Greg Burns, 08-09-2006 10:42:16  
I would take and find a small incline and have the nose faceing down, then remove the bolts around the pto and pull it straight back. By doing this you will have the oil go to the front. These pto units are made very simple and a common problem it the cast piece that engages it will break the ears off and need to be rewelded. if you do not see any visible damage to the pto unit look inside the case and look at the shaft that drives it. I would try to fix the unit you have, if you want to go newer style you would need to replace the bottem shaft in the transmition. To work on the pto unit you do not need to pull the top cover

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Brian in NY

08-09-2006 13:38:04




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 Re: Changing PTO shaft H farmall in reply to Greg Burns, 08-09-2006 10:42:16  
I assume the PTO is engaged and clutch released?
If it works then....you can use an upsizer adaptor to get it to standard size.



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NDS

08-09-2006 10:54:03




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 Re: Changing PTO shaft H farmall in reply to Greg Burns, 08-09-2006 10:42:16  
The early Hs have a slot or dog drive PTO while later ones (beginning in early 1941) have spline drive. To put later PTO in early tractor requires transmission countershaft to be changed to spline drive type.



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