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Allis Chalmers Discussion Forum
:

Over-running clutches

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Tom

01-24-2004 16:49:36




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I would like to put an over-running clutch on the PTO of an AC Model B. I have already purchased a spline adapter to make the pto 1 3/8. Do I still need the spline adapter if I purchase the over-running clutch? Or can on use them both on the current 1 1/8 pto? If I sound like an amateur about this stuff, it is because I am. Thanks in advance for the help.

Tom




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Jay C (MO)

01-25-2004 08:16:57




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 Re: Over-running clutches in reply to Tom, 01-24-2004 16:49:36  
Tom,

They make an over running clutch that fits the 1 1/8" spline of the B and then converts to the 1 3/8" that you need. They also make one that has 1 3/8" at both ends. Both probably the same price, so you are going to spend the same money either way you go. I would get the one that adapts the 1 1/8 to the 1 3/8 thus using only one adaptor between your pto shaft and your implement rather that the two ( spline adaptor then over running clutch.

Also I would imagine that if you use both you would really extend the length of you pto shaft before the point where you hook up your implement. I would think that this would put extra pressure on the shaft, but then again I am not an engineer just what I think. I would keep it short.

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Jay C (MO)

01-25-2004 08:24:22




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 Re: Re: Over-running clutches in reply to Jay C (MO), 01-25-2004 08:16:57  
P.S.

Regarless whether you have pull or 3 point mower the over running clutch is designed to keep your spinning mower from pushing your tractor forward after you have engaged the clutch to stop. I have a 3 point on my B (personal choise and availablity of mower type being the deciding factor) with the over running clutch and it works as advertised.



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Dale in I'N'

01-24-2004 18:07:00




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 Re: Over-running clutches in reply to Tom, 01-24-2004 16:49:36  
I'm kinda a Ford "N" guy, and haven't used my Allis for much more than parades, but get that ORC On my Ford the bush hog or finish mower would push me inta places that I really didn't want to be. With the ORC the tractor stopped when I wanted it to, I assume the Allis would have the same problem if hooked up a bush hog or some other implement that would hold a lot of inertia. Godd Luck...



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Joe (TX)

01-24-2004 17:51:03




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 Re: Over-running clutches in reply to Tom, 01-24-2004 16:49:36  
They make overun clutchs that will fit 1 1/8 pto shafts on the tractor. You can get them with a 1 1/8 or 1 3/8 output on them.



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De from Tulsa

01-24-2004 21:57:32




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 Re: Re: Over-running clutches in reply to Joe (TX), 01-24-2004 17:51:03  
If you are using a pull type brush hog be sure and read the instructions that came with the new o.r.c. If they tell you not to use the clutch on a pull type brush hog, Don't do it. Don't ask me how I know.



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Tom

01-25-2004 13:47:11




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 Re: Re: Re: Over-running clutches in reply to De from Tulsa, 01-24-2004 21:57:32  
Dale, Jay, Joe and De.

Thanks for all the information.

Tom



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