WD9 Dual Exhaust

[Grabatire]

There's an ad on the YT Photo Ads wherein the seller claims the dual exhaust on a WD9 are 'factory'. Now it could well be that a factory did build that set up, but I wasn't aware of IHC ever offering that as an option, and it doesn't show up in any parts book that I have.

Anybody know?
 

[sflem849]

Huh, so there are two cyls feeding one exhaust pipe? In line??? I have never seen such a thing and it isn't in the parts book. I would like to learn more about it.
 

[mkirsch]

Frankly, a lot of people claim things are "factory." He probably claims the paint job is "factory" too...


 

[D Slater]

Since the center cylinders share the same exhaust port in the head. From the placement of the mufflers I think the manifold is open to all cylinders with just another outlet added.
 

[Bob M]

Never seen anything like that - no way it came from the factory. Further a dual exhaust on a WD9 makes no sense since the engine has THREE exhaust ports (middle 2 cylinders share the center port as sflem849 and D Slater point out).

I suspect rather that tractor has had a tee fitting installed atop the stock manifold with the tee's run outlets feeding the mufflers.

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Incidentally I once ran across a UD9 power unit (same engine as the WD9) in a Bucyrus dragline crane with a straight-piped triple exhaust. It had obviously been "home built" to replace the original 3-leg manifold.
 

[jim warehime]

Its kinda hard to tell in the photo but don't the muffles look to be on the opposite side of the tractor, don't the 9 series use the same exhaust location as the 6 series and md's? Jim.
 

[Matt E.]

They are on the right side, litterally. You can see the rear muffler is on the side closest to you, in front of the hood bulge for the guages. That would be correct for a diesel model.
 

[Janicholson]

As far as I know all gas start diesel run engines from IH were manifolds on the right. Jim
 

[heavyhaulertoo]

Maybe he thinks hes got d18 motor ha.
 

[charlieu]

Here are a couple pictures of a TD18A, that I just finished repairing. This had factory dual exhaust. Three cylinders feeding exhaust to each muffler.