Put a vertical exhaust stack on my CUT

[SmallChange]

When I got my new New Holland WM25, most things were way better than the old used Kubota B6200. But one thing that wasn't was the exhaust, which was low and forward so I'm often driving through my smoke. I don't get why this is supposed to be ok -- and anyhow I have chronic bronchitis and can't tolerate it well.

So I finally finished the modification pictured here. I chopped the existing exhaust pipe about a foot or so after the muffler, mounted a vertical exhaust pipe, and joined these together with a length of flexible exhaust pipe. The mount parts are 1/2" by 2", and 3/8" by 3", mild steel from McMaster. I did get a shop to do the weld, but the cutting and drilling I did at home. The assembly clamps onto the very solid upright of my FEL mount, very firmly (I used four 1/2" Grade 8 bolts torqued to spec). I didn't cut or drill anything on the tractor, other than shortening the existing exhaust pipe. Loader and hood operate normally.

 

[kthompson]

Looks good. I think they use the down towards the front exhaust for couple maybe three reasons: cleaner view of front-end loader, clearance for those who need to fold roll over bar say for shed and really just height clearance such as for shed. So will stick with a couple of reason

 

[jyoutz]

I used to be bothered by diesel fumes when using my old tractor. I can’t smell anything on my new tractor with tier 4 DPF.

 

[oldnslo]

I also believe tilt up hoods benefit from horizontal exhaust.

 

[Gordon Gould]

When I got my new New Holland WM25, most things were way better than the old used Kubota B6200. But one thing that wasn't was the exhaust, which was low and forward so I'm often driving through my smoke. I don't get why this is supposed to be ok -- and anyhow I have chronic bronchitis and can't tolerate it well.

So I finally finished the modification pictured here. I chopped the existing exhaust pipe about a foot or so after the muffler, mounted a vertical exhaust pipe, and joined these together with a length of flexible exhaust pipe. The mount parts are 1/2" by 2", and 3/8" by 3", mild steel from McMaster. I did get a shop to do the weld, but the cutting and drilling I did at home. The assembly clamps onto the very solid upright of my FEL mount, very firmly (I used four 1/2" Grade 8 bolts torqued to spec). I didn't cut or drill anything on the tractor, other than shortening the existing exhaust pipe. Loader and hood operate normally.

View attachment 762810View attachment 762811

Looks very good. I wonder about the same things you did. My M5640 with it's external EGR valve is kinda smoky at times. What kthompson and oldnslo say makes sense though.

gg

 

[Richard]

Looks great. My JCB has a vertical exhaust. I might hit a low hanging branch from time to time (have learned to try to dodge them) Bent my exhaust. Yours looks pretty tall. I get that if your canopy won't go under a branch, your pipe won't so you should already be aware of that situation....

What I might find attractive (from a functional point of view) is rather than route it vertical, maybe run it out the back or some other way of not having it being first in line to hit something.

I've banged my exhaust so much, I had to take it off, beat the inlet side back into shape.... it won't snug down like " new" so I simply leave it loose so now, I can remove it with 2-hands and NOT have to unbolt anything. Basically it's held in place by gravity and is otherwise, free to wiggle a bit. It's still pretty snug so don't envision it doing gymnastics on my hood....but if I hit a branch, it will simply push backwards instead of being bent or bending something else. I can then push it back in place.

Been working for me like this for 20 years now. I would STILL love to get it out of my line of site and/or plumb it back to the 'A' pillar of the cab and maybe use the pillar as a support.

 

[ruffdog]

Is the smoke visible after it is at full operating temperature? If it is, there may be an issue that should be addressed first.

 

[SmallChange]

This pipe is going to hit a low branch first, but it's not quite as high as the canopy. I can see the top of the pipe while operating. In fact, I might put a wire on the top, like a curb feeler, to test whether the canopy will fit.

I hope that the pipe, which is ordinary Walker brand exhaust tubing, will bend before it damages anything else. It should buckle at the top of the bracket. It's easy to replace the pipe, and I have a spare one which is a little dinged up from the mocked-up version I put together first to test it all out.

My smoke is generally not visible except when first starting up, and even then it's not very visible. It's been the same since I first got the tractor, brand new.

 

[EddieWalker]

My 37hp tractor had the exhaust under the engine and facing the ground. If I wasn't breathing diesel, it was blowing dust up into the air to breath. I bent the pipe so it exited to the side, which solved my issues.

 

[Cycledude]

Very Nice job on the conversion ! For me the only time the front exhaust bothers is when I first start the tractor and have to walk in front of it to open the two sliding garage doors. But my tractor is equipped with a factory cab and fortunately don’t suffer with bronchitis.

 

[5030]

Interestingly, one of my M9's has the through the hood vertical exhaust and my other one has the optional down exhaust the exits just in front of the loader frame and turns outward and I actually prefer it over the vertical exhaust pipe. Maybe my smeller is dead at 72 years old but I've never smelled it on either. I do know that a T4 final exhaust can and will stink of the system isn't dosing (diesel exhaust fluid) properly which isn't an issue on little tractors like yours but is on my larger units.

 

[dieselcrawler]

My lil' ol' 3005 had the bucket-blackening lower-front exhaust exit... after I built a roll cage with limb risers, I ran the exhaust pipe up one of the limb risers to exit over the top of the roof panel. Safe from tree branch damage, no fumes in my face. Can't find a good picture to share at the moment... it is somewhat visible here, running up the left side riser.

 

[ultrarunner]

I have two Fords from the 50’s and much prefer the one with exhaust piped to the rear… it’s a pleasure to operate all day.

That said I generally don a respirator for most tractor work… all mine are open cab.

 

[dieselcrawler]

I have two Fords from the 50’s and much prefer the one with exhaust piped to the rear… it’s a pleasure to operate all day.

That said I generally don a respirator for most tractor work… all mine are open cab.

I agree with the rear exit sentiment... dad's ol' Massey 135 diesel has that, you dont notice the exhaust during operation. The exception is when hooking up 3PH implements, as the tractor has some age on it and injectors wear, the fumes in your face hooking up the PTO are obnoxious. Obviously, shutting down the motor would solve that issue, but I tolerate it the infrequent times I use it, as I prefer to not stop/start diesel engines afew minutes apart any more than necessary.

 

[rScotty]

Looks very good. I wonder about the same things you did. My M5640 with it's external EGR valve is kinda smoky at times. What kthompson and oldnslo say makes sense though.

gg

Our Kubota M59 uses the same engine - the V2403 4 cylinder - that your M5640 does. The interim Tier IV with the external EGR valve. Clever, but sooty. So I'd agree, "kinda smoky at times" would describe it. So would "Very Smoky at Other Times".
I try to ignore it, but sometimes that's hard to do. I confess that I haven't done the recommended muffler cleaning service like it says in the owner's manual.

Anyway, I've meant to do the same vertical exhaust mod for way too many years now. My hat's off to SmallChange for actually doing it.
rScotty

 

[Richard]

it is somewhat visible here, running up the left side riser.

Saw it instantly. Actually, I saw it before reading your commentary as I was suspecting you had done something like that. Well done!

 

[SmallChange]

I also believe tilt up hoods benefit from horizontal exhaust.

No doubt. Horizontal exhausts pretty much leave the hood untouched.

My old Kubota had vertical exhaust that came off the exhaust manifold, passed through the side of the engine housing, and curved upward. There was a little panel in the side of the engine housing between the exhaust and its top edge, held on with two bolts, to allow removing that side of the engine housing. It worked, but obviously was a little more trouble, both to manufacture and to service the side of the engine. On that machine, the hood was hinged at the front, and was above the engine without covering its sides; the sides of the housing covered the sides of the engine and were independently removable which I did from time to time.

The new tractor hood covers the sides of the engine as well as the top, and hinges just in front of the instrument panel. On this conversion, I cut off the exhaust pipe at a location where it's running straight downward, hidden by the hood. Since the flex tubing makes a U turn below the bottom edge of the hood, it doesn't interfere with the hood at all.

I also like that there's a trap there, like a sink trap. If somehow it did get several inches of rain, it would fill up this U turn for a long time, then the horizontal muffler under the hood, before it got into the engine. I always disliked the old Kubota exhaust design that would funnel rain water into the exhaust manifold eventually. I bought it used, and it always looked like it was rode hard and put away wet. The first time we started it in the dealer's back lot where it was stored, a bit of water flew out of the exhaust.

 

[ruffdog]

I sure like the exhaust to be tucked away so it is not in the way and not in my view. I never had an issue with the Deere or NH tractors but the Cub Cadet I do smell once in a while (straight out the front). The Toolcat exhaust pipe feeds into a much larger elbow pipe (loose fitting) that directs the gases while also mixing with clean air.

https://www.amazon.com/Dynomax-4109...=&hvlocphy=9018912&hvtargid=pla-1021065972152

 

[Gordon Gould]

My lil' ol' 3005 had the bucket-blackening lower-front exhaust exit... after I built a roll cage with limb risers, I ran the exhaust pipe up one of the limb risers to exit over the top of the roof panel. Safe from tree branch damage, no fumes in my face. Can't find a good picture to share at the moment... it is somewhat visible here, running up the left side riser. View attachment 763060

This is what I should do. Since I stole a lot of your roll cage ideas I might as well take your exhaust ideas too. Thanks.

gg

 

[rScotty]

My lil' ol' 3005 had the bucket-blackening lower-front exhaust exit... after I built a roll cage with limb risers, I ran the exhaust pipe up one of the limb risers to exit over the top of the roof panel. Safe from tree branch damage, no fumes in my face. Can't find a good picture to share at the moment... it is somewhat visible here, running up the left side riser. View attachment 763060

How do you get the hood open?