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Ford 9N, 2N & 8N Discussion Forum
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PTO shaft conversion assembly

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Old Odie

07-22-2006 19:45:40




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This may be a dumb question or a proposed stange solution, but here it goes: I have a late 1950 8N with transmission/hydrolic fluid leaking out around the PTO at pretty steady rate. I assume (always dangerous to assume, I know) that there is an oil seal on the PTO shaft that has gone bad. Reading through the shop manual and other manuals, it sounds like changing the seal is pretty complicated (or would be for me at least), and maybe require time and tools I don't have. On the Yesterday's Tractor's parts list, I saw a PTO Shaft Conversion Assembly. From what I read in the manuals, etc., it sounds like I would only have to remove four bolts, pull out the old shaft assembly, slide in the new shaft assembly, and put back and tighten the four bolts, and I would have a new seal, new bearing, etc., all in one step. The PTO shaft conversion assembly is part no. 9N70038, and cost about $105.00; maybe an acceptable price if it would solve the leak and save me hours and bruised, busted, or burned fingers. Some day, when I can retire, I hope to do a total restoration on this tractor. What thoughts do you all have on doing this to fix the leak. As always, thanks in advance for all advice. This is a great forum.

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IndianaTZ

10-24-2006 01:05:54




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 Re: PTO shaft conversion assembly in reply to Old Odie, 07-22-2006 19:45:40  
OK... So how does the seal come off?



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Old Odie

07-23-2006 09:27:55




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 Re: PTO shaft conversion assembly in reply to Old Odie, 07-22-2006 19:45:40  
I did just get the tractor recently, so plan to change the fluid anyway. I read somewhere, probably on this forum, that after draining all the fluid from the three holes, flushing out with kerosene should also be done to remove more sludge, etc. That sounds a little scary, for example, what if I don"t get all the kero out after flushing, and would the kero damage gaskets or anything else. Since this tractor is 56 years old, and since I don"t know how it was maintained, there probably is a lot of sludge in there, but that may be the only thing keeping it from leaking worse (lol). Is flushing it out a worthwhile project once I have it drained? Thanks.

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old 9

07-23-2006 06:34:42




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 Re: PTO shaft conversion assembly in reply to Old Odie, 07-22-2006 19:45:40  
Replacing the seal is pretty simple a lot less money than the new shaft. On the other hand the new shaft would be 1 and 3/8 inches instead of 1 and 1/8 inch. The larger size is the standard now. No special tools needed.
I would get extra gasketts so if one messed up. Put her nose down take it apart look it over then decide.



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souNdguy

07-22-2006 22:42:21




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 Re: PTO shaft conversion assembly in reply to Old Odie, 07-22-2006 19:45:40  
Yes.. assuming the new shaft comes with the pto flange gasket.. and that your shaft is not twisted.. it is a 15 minute 4 bolt job...And that includes the 'smoke and frosty beverage after you do all the work, and back it out of the ditch with the new shaft.

Soundguy



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Joe(NYC)

07-22-2006 20:27:42




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 Re: PTO shaft conversion assembly in reply to Old Odie, 07-22-2006 19:45:40  
Old odie,
Yes according to the many posts I read in this great forum it is a 4 bolt operation. You would need to drain all the hydraulic fluid from the 3 different locations under tranny. It can also be done without removing the fluid by tipping front of tractor into a ravine like hole so that the rear points upward. This way the fluid goes toward the front and downward and none at the PTO area. Both of these methods would work OK if the pto shaft is not bent internally. If it is bent too much you will not be able to pull it out. In this case it becomes more complicated and I will let others who are experienced provide the info. I think that since you just got the tractor it would probably be best to just replace the fluid.(just under 5 gals)

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JDrew

07-23-2006 05:20:38




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 Re: PTO shaft conversion assembly in reply to Joe(NYC), 07-22-2006 20:27:42  
No need to drain the fluids. Just park the tractor nose down in a ditch so the fluid all runs forward. Swap the parts and back it out. (Learned that trick right here!)

J-



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