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Allis B muffler replacement help

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BraedonAllisB View Drop Down
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Joined: 16 Feb 2020
Location: Lynden WA
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    Posted: 09 May 2021 at 1:13am
Hey quick question, I'm looking to replace the exhaust on my Allis B with a new exhaust with muffler to make it a bit quieter. I was looking and are there any bolts holding the exhaust on. Or should it just pull out. Thanks for any help. Might just be rust welded maybe?
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PaulB View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote PaulB Quote  Post ReplyReply Direct Link To This Post Posted: 09 May 2021 at 7:13am
When you look where the muffler joins the manifold. there is a lock bolt the is most likely rust welded. This may or may not be threaded in the manifold. For that style muffler your looking at a through pinch bolt is how it will be attached. However as you already have the large hole in you hood, I'd suggest getting the later style Nelson from Alex here on the forum. It will have a flange on the bottom of the muffler that extends down the manifold to be secured with 2 bolts into the manifold. The Nelson muffler will cost more and it will also outlast the one you'll get for TSC. 
If it was fun to pull in LOW gear, I could have a John Deere
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steve(ill) View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote steve(ill) Quote  Post ReplyReply Direct Link To This Post Posted: 09 May 2021 at 8:21am
Look at your straight pipe and see how it is attached... Does it slide INTO the manifold ?  Some manifolds have been MODIFIED by threading the hole and adding a pipe nipple, then the new muffler slides OVER the nipple with a regular muffler clamp.. Make sure what you have before you buy.
Like them all, but love the "B"s.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dusty MI Quote  Post ReplyReply Direct Link To This Post Posted: 09 May 2021 at 8:58am
Be carful how high it goes, low tree limbs are hard on exhaust pipes & manifolds.

Dusty 
917 H, '48 G, '65 D-10 series III "Allis Express"
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C in Concord View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote C in Concord Quote  Post ReplyReply Direct Link To This Post Posted: 09 May 2021 at 11:37am
There should be a clamp bolt that engages with an open slot in the bottom of the muffler, as shown below.



As another option, you could go with a thru-type muffler (left item #4 above).  The thru-type looks a little better, in my opinion, but wasn't available from TSC or Fleet Farm last I checked.  I got mine from here:  Allis Chalmers Muffler Thru Hood - Vertical Round Body | ACS103 (jensales.com)


Ben


Edited by C in Concord - 09 May 2021 at 11:47am
Leave things better than you found them.

1941 Model C (restored 2020)
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BraedonAllisB View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote BraedonAllisB Quote  Post ReplyReply Direct Link To This Post Posted: 09 May 2021 at 4:15pm
I'm geussing this is the bolt I need to take out...or what's left of a bolt... It's hard to see but it's at the top of the manifold

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steve(ill) View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote steve(ill) Quote  Post ReplyReply Direct Link To This Post Posted: 09 May 2021 at 4:33pm
YEA... that wont be coming out anytime soon !!... You can  grind flush, drill it out , if it wont PUNCH out .......replace it or thread a pipe nipple inside for the exhaust to set OVER..






Edited by steve(ill) - 09 May 2021 at 4:35pm
Like them all, but love the "B"s.
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steve(ill) View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote steve(ill) Quote  Post ReplyReply Direct Link To This Post Posted: 09 May 2021 at 4:37pm
you might even want to cut the exhaust pipe off FLUSH so you can see inside and help grab the bolt head.

another possibility is to cut the pipe off with  2 inches sticking out... Then buy a muffler that will slide OVER the old pipe ( assuming the pipe is still good).... I actually have a tractor like that, i slide a 90 degree elbow over it that goes thru the hood and points forward to the left side of radiator. Mounted the muffler horizontal so it dont catch braches under the trees.




Edited by steve(ill) - 09 May 2021 at 4:41pm
Like them all, but love the "B"s.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote HD6GTOM Quote  Post ReplyReply Direct Link To This Post Posted: 09 May 2021 at 9:38pm
Mine has the pipe cut off just above the hood. Dad bought a new muffler for a JD 420 Utility tractor he owned. The muffler hung on the wall in the milking barn for years.   It slid over the protruding pipe on the B. Works good and gets the exhaust out of my face.
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Steve in NJ View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Steve in NJ Quote  Post ReplyReply Direct Link To This Post Posted: 10 May 2021 at 6:57am
Underhood mufflers are cool, but two problems there. Paint peels off the hood eventually from the heat, and the exhaust is constantly in yer' face. Upright version is better providing you don't have a lot of tree's to go under like Steve does. When I first started restoring my B 20 years ago, my manifold looked just like yours with the bolt rusted off. I did just what Steve explained, I ground the bolt flush, found center and drilled my butt off. I actually got to the threads and saved the threads in the manifold! I was amazed myself that it came out that good! I used a lot of Antisieze on the new bolt when I re-installed the new muffler....  Thumbs Up
Steve@B&B
39'RC, 43'WC, 48'B, 49'G, 50'WF, 65 Big 10, 67'B-110, 75'716H, 2-620's, & a Motorhead wife
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DSeries4 Quote  Post ReplyReply Direct Link To This Post Posted: 10 May 2021 at 9:29pm
Originally posted by Steve in NJ Steve in NJ wrote:

Underhood mufflers are cool, but two problems there. Paint peels off the hood eventually from the heat, and the exhaust is constantly in yer' face. Upright version is better providing you don't have a lot of tree's to go under like Steve does. When I first started restoring my B 20 years ago, my manifold looked just like yours with the bolt rusted off. I did just what Steve explained, I ground the bolt flush, found center and drilled my butt off. I actually got to the threads and saved the threads in the manifold! I was amazed myself that it came out that good! I used a lot of Antisieze on the new bolt when I re-installed the new muffler....  Thumbs Up
Steve@B&B


Use brass bolts.  They will not rust like regular carbon steel bolts.
'49 G, '54 WD45, '55 CA, '57 WD45, '58 D14, '59 D14, '61 D15D, '66 D15II, '66 D21II, '67 D17IV, '67 D17IVD, '67 190XTD, '73 620, '76 185, '77 175, '85 6080
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Steve in NJ Quote  Post ReplyReply Direct Link To This Post Posted: 11 May 2021 at 7:04am
The problem with Brass bolts is they can fracture in a high vibration area and fail. I wouldn't think that particular area would be good spot for a Brass bolt. JMHO.  I used a grade 5 S/S bolt in my B, and antiseized the snot outta' it....  LOL!  Thumbs Up 
Steve@B&B
39'RC, 43'WC, 48'B, 49'G, 50'WF, 65 Big 10, 67'B-110, 75'716H, 2-620's, & a Motorhead wife
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AC since 12 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote AC since 12 Quote  Post ReplyReply Direct Link To This Post Posted: 11 May 2021 at 9:08am
My 40 B has a bolt that threaded thru from the front of the manifold where the muffler sits down on it. The bolt came out "pretty easy" and I slipped the new muffler on and tightened it up. No big deal.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote PaulB Quote  Post ReplyReply Direct Link To This Post Posted: 12 May 2021 at 6:58am
when you have a problem with low hanging branches, use loppers to trim everything you can reach while mowingThumbs Up I carry a pair on the CA that I mow with. It's foolish to have the same branch smack you in the face every week Confused
If it was fun to pull in LOW gear, I could have a John Deere
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