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Discussion Forum

PTO oil leak

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John Shuler

06-19-2001 19:45:20

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My A started leaking gear oil from around the pulley PTO. I went to a dealer and he sold me what looks like a wheel bearing seal. It looks nothing like the original but does fit. I questioned it when he showed it to me but was assured it is the right one. I put in the new seal and it leaks,,,just like the old one. Anyone had a similar problem.

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06-20-2001 05:02:34

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 Re: PTO oil leak in reply to John Shuler, 06-19-2001 19:45:20  
There is a bushing that slide over the belt pulley shaft that the seal runs on. The bushing is easily lost if you do not have anything on the pulley shaft. When the belt pulley is not on the shaft, there is a retainer that is supposed to be installed to keep the bushing from coming off. If you don't have the bushing, no way the seal will work. If you have an obvious gap between the shaft and the seal, you are missing the bushing.

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John Shuler

06-20-2001 19:05:23

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 Re: Re: PTO oil leak in reply to Haas, 06-20-2001 05:02:34  
I never saw a bushing or a retainer. Mabey there was a bushing that came off(?). In looking it over it doesn't appear that another seal would help.

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06-21-2001 05:18:20

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 Re: Re: Re: PTO oil leak in reply to John Shuler, 06-20-2001 19:05:23  
If the bushing is there, you would not know it unless you take the seal holder off. Then you can slide the bushing off the shaft. The bushing (or spacer) is on the shaft between the ball bearing and the belt pulley and it runs against the seal. I suppose it may get stuck on there so could be hard to get off. If the bushing is missing, there will be a space between the seal lip and the shaft. Sounds like yours is OK. I don't have an A, but I think the C is the same. The part number for the C is 43630D. The parts book calls the part a spacer. If the seal is leaking because the bushing is worn, it would be easy to replace the bushing which would renew the surface that the seal runs on. Your leak could also be caused by a worn bearing, allowing play in the shaft that the seal can't handle.

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Dave T

06-19-2001 20:30:29

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 Re: PTO oil leak in reply to John Shuler, 06-19-2001 19:45:20  
These new seals are only half as thick as the old. The old ones were combination felt and leather. The new seal sometimes rides on the portion of shaft that is warn, hense the leakage. I've heard of guys using seal sleeves(???) don't know much about them. You could try to locate seal on different area of shaft, since the new ones are only half as thick. When I have an area that seems to want to leak, I'll double the seals up, put two in, since their half as thick. I've had pretty good luck that way. I also always grease the shaft and the seal up good to aid in installation

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06-19-2001 22:03:47

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 Re: Re: PTO oil leak in reply to Dave T, 06-19-2001 20:30:29  
I've done the double seal trick several times when replacing the old Chicago Rawhides. Works!

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