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Allis Chalmers Discussion Forum

D-17 AC

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Bret in Oklahoma

02-19-2008 13:01:24

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I need some clarification on the D-17 Allis I recently purchased. I found the serial # D17_25810. I was told this is a 1959 model. I am in need of parts to repair, specifically exhaust manifold and gaskets, but other parts as well. Questions: In looking for an exhaust manifold, I was told that the manifold for the D-17 is the same as the D-17 series III and that it has a smooth outlet, but mine has a threaded outlet. What kind of tractor do I have, a D-17 or D-17 series III or series IV? Why does my exhaust have a threaded outlet and the supplier says it should be smooth (for a D-17 or D-17 series III)? The other question is, what do I need to add to the outlet, if it is threaded, or if not threaded, what do I need to get to the muffler from the manifold?

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02-21-2008 05:57:59

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 Re: D-17 AC in reply to Bret in Oklahoma, 02-19-2008 13:01:24  

There is a plate that bolts to the manifold and extends up the side of the muffler 4 to 6 inches. The tractor would have a metal loop that goes around the plate and muffler to tighten it all up. The loop would bolt to the center rib. If you look at the bottom of the rib there will be two holes drilled in the metal right beside the muffler.

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Bret in Oklahoma

02-20-2008 06:56:21

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 Re: D-17 AC in reply to Bret in Oklahoma, 02-19-2008 13:01:24  
Thank you all very much! One other question and/or clarification. If I get the smooth outlet manifold, in which it sounds like I am, what do I need to connect it to the muffler? A pipe nipple will work for the threaded one, but what about the smooth outlet? Will just a piece of pipe work or is there an actual manufactured part available? I have two more questions: 1. Is there a stablizer bracket to help hold the muffler, it sticks up in the air pretty far without much support? 2. I need a manual for the tractor, what is a good one to get and where do I get it? I have the AC-201 and it is not good!

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Jerry Coulter

02-20-2008 09:06:17

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 Re: D-17 AC in reply to Bret in Oklahoma, 02-20-2008 06:56:21  
The factory manifold was smooth and had 1 or 2 threaded bosses on the side. The muffler has an ear with a hole which extends down over the boss. Use dealer supplied 7/16 inch aluminum cap screw to fasten it (in case you ever want to remove it).

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Bret in Oklahoma

02-21-2008 06:49:28

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 Re: D-17 AC in reply to Jerry Coulter, 02-20-2008 09:06:17  
Thank you all very much. Your time and expertise is very much appreciated! I am a green horn when it comes to tractors, but I am mechanically inclined. I might very well ask for your assistance again.

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02-20-2008 05:18:55

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 Re: D-17 AC in reply to Bret in Oklahoma, 02-19-2008 13:01:24  
I think the other guys are right. You may have had a manifold or engine swap. I changed my factory manifold on my series II about three years ago and it was smooth. I bought a Vinson replacement and it was smooth as well. It's a good manifold probably better than the factory it's a little heavier.

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Jerry Coulter

02-19-2008 15:43:47

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 Re: D-17 AC in reply to Bret in Oklahoma, 02-19-2008 13:01:24  
Your tractor may have had an engine or manifold swap. The similar Gleaner E engines have threaded outlets. I see no reason you couldn't screw in a pipe nipple and clamp on a muffler like on a IH M or H.

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02-19-2008 14:19:58

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 Re: D-17 AC in reply to Bret in Oklahoma, 02-19-2008 13:01:24  
Yours is a 1959 Series I. The Series II started in 1963.

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