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Allis Chalmers Discussion Forum

Question on attaching exhaust pipe to manifold

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03-18-2004 04:38:31

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I installed a new exhaust manifold on my WF. I was wondering how the exhaust stack is supposed to be clamped on. This manifold has two threaded holes. One in the rim of the casting at the outlet and one in the center of the manifold below the outlet. What did the original clamp look like? I imagine that the lower hole is for a brace of some sort and the upper is for a pinch bolt but the fact that it is threaded and is drilled a bit off center has me thrown a bit. My original manifold had just a hole in the rim and a bolt thru it that clamped the stack to the edge of the hole. Should there be a collar on the exhaust stack that rests on the manifold to keep it steady? Did they use a brace down to the lower bolt hole? Any feed back is appreciated. Thanks!

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Dave K

03-22-2004 14:49:05

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 Re: Question on attaching exhaust pipe to manifold in reply to Chris(WA), 03-18-2004 04:38:31  
The WD's had a clamp which clamped the muffler to the manifold. The WD-45 has a bolt on manifold. Fooled me for a while cause I bought a WD muffler and just could not get it to stay tight on my WD. Finally went to a parts breakdown and discovered my WD actually now had a WD-45 manifold on it....problem solved with a WD-45 muffler.


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JB in VA

03-18-2004 20:00:36

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 Re: Question on attaching exhaust pipe to manifold in reply to Chris(WA), 03-18-2004 04:38:31  
I posted a pic of the clamp & bracket...

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JB in VA

03-18-2004 19:33:37

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 Re: Question on attaching exhaust pipe to manifold in reply to Chris(WA), 03-18-2004 04:38:31  
I recently bought a replacement through-hood muffler for my '50 B. It came with a clamp and support piece 'exactly' like the ones described by JMS.

My muffler mounted with a tight force fit about 1.5" into the exhaust port of the manifold and with a single bolt just as you described your was.

(I have no need for the clamp and support I have... FYI...)

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03-18-2004 08:31:13

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 Re: Question on attaching exhaust pipe to manifold in reply to Chris(WA), 03-18-2004 04:38:31  
What you describe reminds me of a manifold from a different tractor- maybe WD or WD45, that we had many years ago. The two holes held a piece of steel, slightly rounded to match the curve of the muffler. Was about 1 1/2 inches wide and about 5 inches long. Bolted to the manifold, and the muffler was held to the piece with a U-clamp. Some mufflers might have had the piece welded to it.

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