Gas D 15 series 1 muffler
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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=185361
Printed Date: 23 Sep 2025 at 3:15am
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Topic: Gas D 15 series 1 muffler
Posted By: ACinSC
Subject: Gas D 15 series 1 muffler
Date Posted: 27 Dec 2021 at 1:00pm
| Santa brought me a Nelson #233450 muffler . I pulled the 2 year old Stanley and the Nelson won't fit . Looks like the rain skirt is gonna need massaging . Just thought I'd ask if anyone else has had this issue ? I replaced my exhaust/intake manifold a few years ago . Maybe the repop ain't quite right ? THANKS !! |
Replies:
Posted By: DiyDave
Date Posted: 27 Dec 2021 at 6:02pm
|
Is the muffler sitting an inch or so to the left, and won't fit the sheet metal of the hood? ------------- Source: Babylon Bee. Sponsored by BRAWNDO, its got what you need! |
Posted By: ACinSC
Date Posted: 27 Dec 2021 at 6:27pm
| No, it won't line up enough to fit down in the manifold . I was hoping someone else had also run into this before I started making it fit . Thanks for your reply |
Posted By: DSeries4
Date Posted: 27 Dec 2021 at 7:22pm
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I put a new muffler on my D14 2 years ago and I had to trim back the rain shirt a bit. I matched it up to the old Nelson that I had taken off and noticed it did not look the same. After all was said and done, I got it to fit. ------------- '49 G, '54 WD45, '55 CA, '56 WD45D, '57 WD45, '58 D14, '59 D14, '60 D14, '63 D15D, '66 D15II, '66 D21II, '67 D17IV, '67 D17IVD, '67 190XTD, '73 620, '76 185, '77 175, '84 8030, '85 6080 |
Posted By: ACinSC
Date Posted: 28 Dec 2021 at 7:19am
| Thanks Myron . Good to know , I'll figure it out |
Posted By: Alex09(WI)
Date Posted: 28 Dec 2021 at 8:59pm
|
Here is the Nelson muffler on an aftermarket D14/D15 manifold. Looks like the rain shield would have to be trimmed to slide the muffler into the manifold. From the way the manifold is shaped, looks like the original D14/D15 manifolds would have the same problem. I will test a muffler on an original manifold when I get a chance. On the WD45/D17 aftermarket overseas manifolds, the square bosses that have the threaded holes for the muffler bolts need to be ground down so the Nelson muffler can slide all the way on. (The square bosses stick out too far) That doesn't appear to be the case on the D14/15 though.  ------------- www.awtractor.com A&W TRACTOR 920-598-1287 KEEPING ALLIS-CHALMERS IN THE FIELDS THROUGH THE 21ST CENTURY |
Posted By: SteveM C/IL
Date Posted: 28 Dec 2021 at 9:37pm
| Always something ain't it? |
Posted By: ACinSC
Date Posted: 29 Dec 2021 at 7:30am
| Thanks for the help and picture Alex ! |
Posted By: ACinSC
Date Posted: 29 Dec 2021 at 3:48pm
| I'm beginning to think the threaded bosses on my manifold need to be ground down also . Oh well , if I can find my old rusty manifold I'll see how the muffler fits it . |
Posted By: Tracy Martin TN
Date Posted: 29 Dec 2021 at 4:41pm
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Alex, can you post a pic of the muffler bottom showing how the tube is made? I would like to have one if I can cut that shield off and clamp the tube. Thanks, Tracy ------------- No greater gift than healthy grandkids! |
Posted By: DSeries4
Date Posted: 29 Dec 2021 at 8:03pm
The pipe fits down into the manifold and the skirt holds everything in place. Therefore, cutting off the skirt would remove any way of supporting the muffler. In this picture, the old Nelson muffler is on the right and my new one is on the left.  ------------- '49 G, '54 WD45, '55 CA, '56 WD45D, '57 WD45, '58 D14, '59 D14, '60 D14, '63 D15D, '66 D15II, '66 D21II, '67 D17IV, '67 D17IVD, '67 190XTD, '73 620, '76 185, '77 175, '84 8030, '85 6080 |
Tracy Martin TN wrote:Posted By: Tracy Martin TN
Date Posted: 29 Dec 2021 at 10:54pm
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Myron, I have threaded all my manifolds , not sure that one would have enough sticking out.I have a short pipe threaded into them, slide the muffler down over that and use a muffler clamp. No wiggles or leaks. I never liked that type that bolted to the flange. Thanks, Tracy ------------- No greater gift than healthy grandkids! |
Posted By: ACinSC
Date Posted: 30 Dec 2021 at 6:16am
| Thanks for the side by side pic Myron . Tracy I like your idea . |
Posted By: ACinSC
Date Posted: 30 Dec 2021 at 10:32am
| Tracy , the Nelson inlet tube is 1.25 " long . My Stanley has 2.25" inlet . I also pulled my O.E. manifold out of the scrap pile and put it in my vise . Nelson muffler won't slide into place on it either . In all fairness I have "fine tuned" the skirt a little . I'm moving on to something else before I really make a mess . THANKS |
Posted By: ACinSC
Date Posted: 31 Dec 2021 at 2:02pm
| Finally got the Nelson muffler on . Trimmed the rain skirt , ground the outside exhaust manifold threaded bosses down. Got the muffler on but it wouldn't go down far enough for the bolt holes to line up . Had to grind a little notch in the inside of the muffler O.D. where the inside manifold boss was hitting . Happy to say it sounds better than the Stanley . Thanks |