How to bend exhaust tubing?
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=138048
Printed Date: 26 Jul 2025 at 6:32am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: How to bend exhaust tubing?
Posted By: CrestonM
Subject: How to bend exhaust tubing?
Date Posted: 03 May 2017 at 11:46am
|
I have an old undershot muffler off the 8N, and I want to put a bend in it so I can convert it to vertical (so I can run a All-Crop with it). How do I go about doing this? I tried it once before, and even while being very careful with low heat, it developed a hole in the pipe. Anyone ever bend exhaust tubing and have a good method? Thanks! |
Replies:
Posted By: Dans 7080
Date Posted: 03 May 2017 at 12:05pm
|
Exhaust pipe bender I the only way. It would be easier to buy the bends and weld or clamp them together. ------------- When someone tells you Nothings Impossible, Tell them to slam a revolving door |
Posted By: farmboy520
Date Posted: 03 May 2017 at 12:09pm
| I would go to your local exhaust shop and ask them how much they would charge for them to make the bends for you. |
Posted By: steve(ill)
Date Posted: 03 May 2017 at 12:10pm
|
that's what I do.. buy a 90 degree elbow and wire feed weld it as needed. ------------- Like them all, but love the "B"s. |
Posted By: Michael V (NM)
Date Posted: 03 May 2017 at 12:40pm
|
$33.00 from ASAP, PN 100567 .... really ought to find ya a WD,,theres lots of them around and usually don't go for much... |
Posted By: CAL(KS)
Date Posted: 03 May 2017 at 1:29pm
easier to get a orange tractor and be done with the N  ------------- Me -C,U,UC,WC,WD45,190XT,TL-12,145T,HD6G,HD16,HD20 Dad- WD, D17D, D19D, RT100A, 7020, 7080,7580, 2-8550's, 2-S77, HD15 |
Posted By: Gerald J.
Date Posted: 03 May 2017 at 1:42pm
|
In my 2015 ASAP catalog there are several options including 100567 which is the bent pipe, a brace, and the muffler. or really a muffler with bent pipe. I'm not sure the bent pipe is strong enough, from my experience the pipe and the upright muffler will get bent hitting tree limbs and maybe tall corn. I made an assembly for my MF-135 decades ago because I didn't think it was a good idea for the low mounted muffler to be leaving corn stalks glowing while plowing standing stalks. Looks plenty rusty from being on the tractor probably 20 years or more. I have bent the pipe and the muffler hitting things up top.  Gerald J. |
Posted By: TimNearFortWorth
Date Posted: 03 May 2017 at 3:15pm
| Muffler shop would make short order of that and could make you 2 or 3 pieces as a variant so you don't have to go back. We installed 60+ new tie stalls when we took out the original cement in a early 1900's built dairy barn with wooden stanchions growing up. Dad did not like the gauge of ready made stanchion materials at the time and with a little research, bought the pipe to his liking and had the local muffler shop bend them to form pretty quick. |
Posted By: Gary Burnett
Date Posted: 03 May 2017 at 4:20pm
|
On my IH 464 I took off the piece that bolted to the manifold and got a machine shop to weld a pipe nipple to it and then used black pipe to route the exhaust and put on a muffler. |
Posted By: LeonR2013
Date Posted: 03 May 2017 at 4:31pm
| Creston, you can fill the pipe with sand, then heat and bend it around a round object. You'll only have moderate success doing it this way though. |
Posted By: CrestonM
Date Posted: 03 May 2017 at 4:43pm
Nah  An 860 is what I need!  |
CAL(KS) wrote:Posted By: shameless dude
Date Posted: 03 May 2017 at 9:04pm
| what you need is a slap up side the.....lol |
Posted By: CrestonM
Date Posted: 03 May 2017 at 9:09pm
| I'd rather have the "Power to keep my combine humming" Lol |
Posted By: Gary Burnett
Date Posted: 03 May 2017 at 9:26pm
Nothing like jumping out the pan into the fire(LOL) |
Posted By: CrestonM
Date Posted: 03 May 2017 at 9:29pm
|
Lol Speaking of "into the fire", note it has the undershot exhaust (In a wheat field), which seems to worry everyone nowadays lol
|
Posted By: SteveM C/IL
Date Posted: 03 May 2017 at 10:45pm
| if your after function not form,you can heat inside of bend and make a wrinkle bend |
Posted By: CrestonM
Date Posted: 03 May 2017 at 10:52pm
I'm after function. I might try that. I'll only use the vertical muffler for a couple days, only because the farmer who owns the field where I'm combining doesn't want the undershot muffler in his field. "Fire danger".
|
Posted By: CAL(KS)
Date Posted: 04 May 2017 at 8:16am
|
creston, since your moving up you might as well find one with the SOS trans then you can maximize throughput and minimize loss by keeping the combine full at all times
also you can pick up tubing bends at napa or local auto store and weld on for a few $$ ------------- Me -C,U,UC,WC,WD45,190XT,TL-12,145T,HD6G,HD16,HD20 Dad- WD, D17D, D19D, RT100A, 7020, 7080,7580, 2-8550's, 2-S77, HD15 |
Posted By: CrestonM
Date Posted: 04 May 2017 at 8:17am
| Lol |
Posted By: Tbone95
Date Posted: 04 May 2017 at 8:27am
Correction CAL, that's POS transmission! 
|
Posted By: CAL(KS)
Date Posted: 04 May 2017 at 8:28am
|
for sure LOL
At my previous mechanic job, my bosses father who still worked part time, had worked at a Ford dealership for many years and they were kind of our specialty. I usually let the old man work on them as I would do the bigger tractors, heavy equip etc. I didnt mind one bit, but we did have several SOS tractors that we repaired the trans in and he got them fixed! ------------- Me -C,U,UC,WC,WD45,190XT,TL-12,145T,HD6G,HD16,HD20 Dad- WD, D17D, D19D, RT100A, 7020, 7080,7580, 2-8550's, 2-S77, HD15 |
Posted By: jaybmiller
Date Posted: 04 May 2017 at 8:34am
|
OK.... how about ADDING pipe to the end of the original pipe ? Something bent like a 'J' that slides onto the existing pipe and bolted to the tractor. Maybe a pipe clamp to hold it onto the tail pipe. This way, after harvest, you can unbolt the 'extension' and hang up in barn until needed. the tractor would become 'normal' again. Jay ------------- 3 D-14s,A-C forklift, B-112 Kubota BX23S lil' TOOT( The Other Orange Tractor) Never burn your bridges, unless you can walk on water |
Posted By: Gerald J.
Date Posted: 04 May 2017 at 9:42am
|
The first versions of the POS transmission were really POS. Later versions SOS did work and survive. The chief engineer at Ford refused to sign off on the early versions because he thought they were junk. Cost him his job. He moved to Deere at Waterloo and was in charge of their Power Shift transmission for the 3020 and 4020 which have proven to be reliable transmissions. He worked at Deere until retirement many years later. Gerald J. |
Posted By: 1mathom1
Date Posted: 04 May 2017 at 9:43am
|
If I read this right, you are wanting to put vertical exhaust on an 8n. Yesterday's tractors has the whole set up for $36 and change. If you are wanting to go vertical at the end of the existing pipe....I got nothing. Maybe a piece of flex exhaust pipe? I did that on a yard tractor once...worked fine. |
Posted By: CAL(KS)
Date Posted: 04 May 2017 at 9:45am
|
On second thought, skip the 560 and go straight to the 6000 Commander. ------------- Me -C,U,UC,WC,WD45,190XT,TL-12,145T,HD6G,HD16,HD20 Dad- WD, D17D, D19D, RT100A, 7020, 7080,7580, 2-8550's, 2-S77, HD15 |
Posted By: Tbone95
Date Posted: 04 May 2017 at 10:04am
Yes, I've heard that before. How new did a Ford have to be to have a good one? We had a Ford 6000 with that miserable POS transmission in it, and yes, it did fail miserably. One of many disasters with that tractor. The hydraulic system were never really right. We weren't the original owners, so I don't know if they were ever right, but assume they were OK as it rolled out the factory door. They were never right for us. The brakes had 2 modes: free and locked! Made the poor SOB on a hay wagon have some serious sea legs. The first time we went to use the 3 point, we lowered the arms, attached the brush hog, and raised the arms. About 1/2 way up, the tractor began to labor and nearly stalled. With the engine shut off for about 4 days, we could finally work the lever back and forth enough to lower the brush hog. Boy, she was a beautiful running thing when it was working ok. Loved to chop corn with it, when the sos worked right, keep the flame coming about 3 inches out of the pipe! Had a bucket seat from a chevy vega bolted onto it because the original had rusted out! |
Posted By: Tbone95
Date Posted: 04 May 2017 at 10:12am
| Looking at pictures, I'm pretty sure ours was the "commander" type, and I remember the 2 different engine RPM with the PTO markings....but I can't say for sure and don't know what year it was. |
Posted By: HudCo
Date Posted: 04 May 2017 at 10:14am
| 8,9,2, has a bevaled flange on the manifold and you can buy all of the exhaust pipes for them cheap so i think if it was me i would buy a 2 new manifold clamps 1 to repalce the one you cut off and one when you put it back to normal get a new header pipe muffler and tail pipe.then you will have a nice quit tight system when you put it back. now take the old header pipe to the muffler shop or a place that bend hyd.tubing because there benders wont wrinkle the tube, bend a 180 by the flange then weld a piece of 10ga. in center of the radius to keep it from bending then a strap over to a head bolt, muffler on top with a turn out pointed forward |
Posted By: allischalmerguy
Date Posted: 04 May 2017 at 10:39pm
|
Neat story Gerald. Thanks! Pastor Mike
------------- It is great being a disciple of Jesus! 1950 WD, 1957 D17...retired in Iowa, |
Posted By: CrestonM
Date Posted: 04 May 2017 at 10:45pm
I need something that hooks straight to the manifold, as I'm trying to get away from the undershot muffler to satisfy the farmer who owns the wheat field where I'll be cutting. I might end up just buying a kit. I found a straight pipe kit for twenty something dollars at ASAP, and I figure if I put a 45 degree elbow on top and point it away, it won't bother me too much. It's only for a few days a year, anyway.
|
Posted By: shameless dude
Date Posted: 05 May 2017 at 1:33am
| you can buy a tubing bender at HF....the dies are not sized for exhaust tubing, but close enough, that if you fill the tubes you have with sand, they will bend just right in that bender. they aren't expensive. |
Posted By: Tbone95
Date Posted: 19 Aug 2021 at 12:07pm
| You just don't go away, do you?! |
Posted By: steve(ill)
Date Posted: 19 Aug 2021 at 3:55pm
|
whats the matter Tbone... You dont think RENTING tools from England sounds like a good idea ? Shipping and Lead Time might be a problem !! ------------- Like them all, but love the "B"s. |
Posted By: DiyDave
Date Posted: 19 Aug 2021 at 7:18pm
I reported him, AGAIN! As far as the OP goes, fill pipe with sand, heat and bend at will. The reason exhaust benders don't work so well is the small size of the pipe. Another thought is that the tractor don't have the power to push it up... ------------- Source: Babylon Bee. Sponsored by BRAWNDO, its got what you need! |
Posted By: Arcs and Sparks
Date Posted: 19 Aug 2021 at 8:33pm
| Whenever you attempt to hand bend any type of thin wall tubing using heat, if you leave it hollow you will fail every time. If you cap the end and pack it with sandblasting sand then cap the other end ensuring the tube is completely packed , once you apply heat the heat will distribute more evenly around the tube and not hole through. Because it has no way to kink the tube will stretch but only at a shallow curve. The other people are right. Purchase a mandrel bent 90 and weld up your profile. Industrial cities will have a mandrel tube bending shop somewhere and they can program the computer to bend almost any profile---just not cheap. I've seen them bend us up crazy complex tubes for our refrigeration system at work. That mandrel bender is an amazing machine. |
Posted By: Tbone95
Date Posted: 20 Aug 2021 at 7:29am
Well, since it was over 4 years ago, I'm thinkin' he figured something out by now.
|
Posted By: CrestonM
Date Posted: 20 Aug 2021 at 8:42am
| Yessir, I ended up filling it with sand, then bending and it worked fairly well for a first-time try. |
Posted By: PaulB
Date Posted: 20 Aug 2021 at 9:53am
|
Why didn't you just get the vertical muffler for the Frog in the first place? Those Stanley mufflers won't last that long anyway. I've also seen those that add a flex pipe to the underslung pipe and bring it up to the rear of the fender for a vertical discharge. Who cares how crappy it looks, it's a Frog ------------- If it was fun to pull in LOW gear, I could have a John Deere. Real pullers don't have speed limits. If you can't make it GO... make it SHINY |
Posted By: CrestonM
Date Posted: 20 Aug 2021 at 11:39am
|
Adding a vertical extension to the outlet would’ve defeated the purpose of getting the undershot exhaust pipe up and out of the wheat straw. I was using the old muffler to make the vertical one. It wasn’t that good, and I only used it that one year. I had just restored the tractor so I had a new muffler to use the rest of the year. |
Posted By: Ed (Ont)
Date Posted: 20 Aug 2021 at 7:10pm
| Get the proper setup for it. Cheap and easy and then you have both complete setups to use as you wish. We got one for our MF35 almost as soon as we got it home. Got so tired of exhaust in your face every time you were back there. Never used underslung again! |