Interesting gas to diesel conversion on a 3400

Ultradog MN · Jan 13, 2015

This has been discussed here before.
These are photos from another board.
A new member there bought a 3400 that the model # speced out to a gasser but is a diesel. He was wondering about it and posted a few photos.
I found the air pipe to be a simple work around to reuse the gas air filter. Other than cutting the battery tray not too bad of a cobble. Notice it still has the VReg in it's original location.
If a guy went with a 10SI alt and diesel battery tray it would be nicer but it is what it is.
I wonder where that air pipe came from - if Ford made that for conversions of if they bent it to fit on their own.

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Sean in PA · Jan 13, 2015

I can't say for sure, but that tube looks like it was bent by whoever did the conversion. Even a cheap muffler shop bend should keep the cross-section profile rounder than that.

My '73 4000 gasser is sort of the opposite, although I'm pretty sure mine was ordered from the factory this way. It has the oil bath air filter like a diesel, and then it has a tube that runs from up by the radiator back alongside the valve cover then it drops down at the back where the normal tube from the dry air filter would go to the back of the carb. The numbers stamped on the bell housing match the numbers on the sticker under the hood, and the numbers say it's a gasser, and the hood does not have the cut-out on the side for the dry air filer.

Ultradog MN · Jan 13, 2015

Got any photos of the tube/s on yours?
I assume it comes out of the bridge in the nose on the right side and not on the left like a gasser normally does. See photo.
Could someone have changed the nose on it - ie from gas to diesel?
I agree the tube above looks like it was poorly bent where it turns down to go into the manifold but it looks like it originally was a Ford tube of some sort. I wonder what.
I have posted this photo before.
The upper one is a diesel, lower is gas. Both are viewed from the front.

Sean in PA · Jan 13, 2015

Yes, the tube goes through above the radiator on the right side. I think I posted these pictures before, but here they are.

It started out as a state highway department mower, with a 5 foot brush hog on the rear and another 4 foot hydraulic boom arm rotary mower hanging off the right side with the hydraulics for the boom arm and mower being run off of a front mounted stinger pump. The boom arm and mower were gone when I got it, but the Mounting bracket and pump were still there, the pump had been spinning dry for probably 15 years or more so it was pretty much toast. As far as I am aware, I am the 4th owner, with 2 other folks having it between the highway department and myself. I guess it could have had a nose off of a diesel transplanted onto it, but i doubt they would have gone through the trouble of replacing the left side hood panel with one from a diesel while maintaining the original right side hood panel with the foil sticker matching the stamped numbers in saying that it's a gasser.

souNdguy · Jan 13, 2015

i agree. I bet a real muffler shop could make that pipe look real good.

RodinNS · Jan 13, 2015

That pipe appears to have been bent on an exhaust pipe bender... note the way it's formed in the bends.

Rod

Ultradog MN · Jan 13, 2015

I don't remember seeing them before.
Thanks.
Not a bad job.
If I had to lay odds I would say it's not factory though.
But who knows.
When it comes to these Fords, words like never and always seem to come back and bite ya.

64frd4000ind · Jan 13, 2015

Looks to me they went to the salvage yard and found a pipe off of a different tractor or combine that was bent like that. If you look at it closely its flattened and widened on the bend to maintain full airflow, and almost looks like it was bent to go under or around part of an engine.

The pipe doesn't show witness marks as to being bent recently, and the paint looks to be fairly old. So if it was bent to fit, it was done a long time ago, and painted. Otherwise its just off of another application, possibly even a generator.

Similar to the way the hydraulic pump tube is on my 4000.

RodinNS · Jan 13, 2015

That flattening you see in the bend is the signature of an acute bend on an exhaust pipe bender.... It's just steel tube, bent and painted.

Rod

Interesting gas to diesel conversion on a 3400

Ultradog MN

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Sean in PA

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Ultradog MN

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Sean in PA

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souNdguy

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RodinNS

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Ultradog MN

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64frd4000ind

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