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JD A Manifold Number Questions

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Pappy

10-01-2002 22:42:42




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My parts book says an A4039R Manifold will fit my late model "A" JD. It won't! What could this manifold fit? It's listed in the parts manual as a "Gasoline Manifold,Special" Comes as part of a kit with studs.Thanks to anyone!!!




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Mike in Mo

10-02-2002 11:43:47




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 Re: JD A Manifold Number Questions in reply to Pappy, 10-01-2002 22:42:42  
Pappy
I have a 1946 A with that manifold on it. It has the A2325R head (5.5")on it. There is about 1/8" between the exaust crossover and the valve cover. On your late A I assume you have the 5.25" thick head. My guess (I don't have one here to measure) is the manifold mounts a little closer to the rear on the late A head. Maybe someone else has better/more info than me. Mike



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Pappy

10-02-2002 16:04:07




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 Re: Re: JD A Manifold Number Questions in reply to Mike in Mo, 10-02-2002 11:43:47  
Thanks to all who took the time to respond. I will check the head casting number as soon as I can get back down to the farm. This is for a '52 "A".



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Rman

10-02-2002 09:00:08




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 Re: JD A Manifold Number Questions in reply to Pappy, 10-01-2002 22:42:42  
The casting number on the heads that they will fit are different



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Pappy

10-02-2002 09:33:54




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 Re: Re: JD A Manifold Number Questions in reply to Rman, 10-02-2002 09:00:08  
The reason it won't fit is the cross-over exhaust system goes in front of the manifold, and will not clear the valve cover.



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Rman

10-02-2002 10:15:41




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 Re: Re: Re: JD A Manifold Number Questions in reply to Pappy, 10-02-2002 09:33:54  
So the exhaust crossover goes across the front instead of around the back like most? That is interesting. I had some trouble with head to manifold fit up one time, got another head, different casting number and it worked. Dont recall what all was involved, been a long time ago



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