7020 Muffler
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=201311
Printed Date: 31 Oct 2025 at 6:36am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: 7020 Muffler
Posted By: CDN 400
Subject: 7020 Muffler
Date Posted: 12 May 2024 at 5:34pm
| Is there any reason the long skinny muffler off a 200 or 7000 won't work on my 7020? I find the oval muffler is in my line of sight for planting so I put a straight pipe on it and I like the improved vision but I find it adds a lot of noise to the inside of the cab which is very quiet with the muffler. |
Replies:
Posted By: DrAllis
Date Posted: 12 May 2024 at 5:42pm
| It will work fine. |
Posted By: Lynn Marshall
Date Posted: 12 May 2024 at 5:47pm
| The late 7000s used the oval muffler too. |
Posted By: KJCHRIS
Date Posted: 12 May 2024 at 6:38pm
|
It will fit and work fine. ------------- AC 200, CAH, AC185D bareback, AC 180D bareback, D17 III, WF. D17 Blackbar grill, NF. D15 SFW. Case 1175 CAH, Bobcat 543B, |
Posted By: cowkicker
Date Posted: 12 May 2024 at 7:21pm
| What size nmuffler clamp does a 7020 use? |
Posted By: DrAllis
Date Posted: 12 May 2024 at 8:32pm
| 3 1/8 inch. |
Posted By: CDN 400
Date Posted: 12 May 2024 at 9:10pm
| Thanks fellas. |
Posted By: Leon B MO
Date Posted: 13 May 2024 at 2:22pm
|
I actually made a 3 in exhaust pipe with a resonator installed inside. Also used a couple of angles under the hood to line exhaust pipe up with air breather looks very clean and makes visibility much better. I really don't think it's any louder than it was with the factory muffler on it now but the stack goes just above the roof line. Leon B Mo ------------- Uncle always said "Fill the back of the shovel and the front will take care of itself". |
Posted By: CDN 400
Date Posted: 15 May 2024 at 7:50pm
|
[QUOTE=Leon B MO]I actually made a 3 in exhaust pipe with a resonator installed inside. Also used a couple of angles under the hood to line exhaust pipe up with air breather looks very clean and makes visibility much better. I really don't think it's any louder than it was with the factory muffler on it now but the stack goes just above the roof line. I got rid of the air cleaner on hood altogether and made a short adapter and put the original bowl right on top of the air cleaner can under the hood. |
Posted By: AC7060IL
Date Posted: 15 May 2024 at 10:02pm
| CDN 400, if you’ve removed your 7020’s air-cleaner from hood, then maybe consider removing its exhaust straight pipe from hood area too? Could possibly clock (rotate) 301’s exhaust side housing of turbo allowing outlet to exit downward/under right side engine panel? Then route exhaust over & up the right front cab corner? Yes it will require additional fabrication/mounts. But would give a totally open view, if that’s a consideration? If later a straight pipe drone sound becomes annoying at certain engine rpms/loads, then could splice in a 30” long straight-thru glass-pack in the longer stretch where pipe mounts to cab corner. Glass-pack should hush drone without compromising exhaust back-pressure? |
Posted By: CDN 400
Date Posted: 16 May 2024 at 6:52pm
|
AC7060IL wrote: