Under hood mufflers (D21)
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=57741
Printed Date: 06 Sep 2025 at 3:13am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: Under hood mufflers (D21)
Posted By: Bryan
Subject: Under hood mufflers (D21)
Date Posted: 02 Oct 2012 at 11:41am
We have acquired the blue prints to the D21 under hood muffler. It's supposed to be 8 inches round. My question is, would it hurt anything if we went 7 inches round. Trying to keep the heat away from the fresh paint. Also, anybody else interested in one? Don't know the cost yet.
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Replies:
Posted By: dpower
Date Posted: 02 Oct 2012 at 11:46am
Posted By: Luke R.
Date Posted: 02 Oct 2012 at 12:44pm
I would be interested if was the proper size. You could always put some heat deflecting tape on the bottom side of the hood. Pullers use it i know. Imo
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4-7030's,170G,220FWA,3-220's,210,D21II,D21I industrial,2-200's,3-190's,175D,2-D19D's,D19G,WD45,WD,CA,2-UCont.,5015FWA,917,B110,Gleaner F
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Posted By: SteveM C/IL
Date Posted: 02 Oct 2012 at 1:26pm
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Not too practical to offer 2 sizes. I think if I was going to the trouble to acquire blueprints and build one,I'd make it like OEM. It should satisfy the purest and there can't be many others needing one. What I'm saying is,if I wanted a muffler for that app,I'd want the original thing even if it wasn't the smartest design.
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Posted By: TerryMO
Date Posted: 02 Oct 2012 at 1:47pm
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Bryan, we would be interested in 2. I have a old one if you need any sizes. Thanks Terry
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Posted By: dustinmo
Date Posted: 02 Oct 2012 at 6:34pm
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if they are repos of the orig I would be interested in one as well
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Posted By: DarrylinWA
Date Posted: 03 Oct 2012 at 7:00am
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Keep it 8 inches. I had to modify one since I could not find a original for my Industrail. I put Heat sheild and Insulation under the hood of my D 21l. Thanks for sharing and keep us posted. Darryl
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B 10 Custom. Serial # 1001 D21, First D21 built 69 #4498 and Last D 21 Built #4609. 1946 MM UTU. And 2000, 2005 Pete's. AC custom Hauling.
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