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Eddie(IL) 
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Joined: 25 Apr 2010
Location: Oakwood, IL
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 Topic: Converting D17 S-IV gas to diesel
Posted: 01 Apr 2011 at 6:47am |
I've located a reasonably priced Series IV gas, that has a knock in the motor, and I have a Series III diesel with a fresh rebuild on it. Are there any major obstacles that would make the swap not worth the effort, short of changing the originality of the tractor? I wasn't sure if there were any gear ratio differences between the gas and diesel, ect. Thanks
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MACK
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Joined: 17 Nov 2009
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Posted: 01 Apr 2011 at 7:00am |
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I think the torque tube shaft is shorter on the diesel. MACK
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E7018
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Joined: 07 Dec 2009
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Posted: 01 Apr 2011 at 8:06am |
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Mack is right. See the plate between the clutch housing and engine back plate on this tractor;
http://www.allischalmers.com/new/forum/uploads/2035/D17_7.JPG
Don't let that detail stop you. Not hard to work around.
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Brian Jasper co. Ia
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Joined: 11 Sep 2009
Location: Prairie City Ia
Points: 10508
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Posted: 01 Apr 2011 at 9:34am |
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Yep, different part #'s gas vs diesel. Question is will the series 3 shaft work in a series 4? I'm guessing without looking that you'll need to find a shaft from a series 4 tractor to make the swap work.
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"Any man who thinks he can be happy and prosperous by letting the government take care of him better take a closer look at the American Indian." Henry Ford
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Sam T-Ga
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Joined: 13 Sep 2009
Location: Monticello, Ga.
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Posted: 01 Apr 2011 at 9:41am |
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Just swap the rear ends, that will give you the series 4 3point and keep the diesel fuel tank and sheet metal, frt end togher. The side frames and sheet metal is longer on a diesel. the difference in the shafts is diesel vs gas, series don't matter.
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Sam T-Ga
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Location: Monticello, Ga.
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Posted: 01 Apr 2011 at 9:43am |
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I forgot about hyd pump, you will have to change the belt drive to the pump drive.
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Nathan (SD)
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Location: Day County SD
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Posted: 01 Apr 2011 at 1:37pm |
I am a bit of the square peg in the round hole guy. But I don't think I would attempt this one either. Series 4 is just too much different than the other D17s. I took a series 1 and went from diesel to gas and that was quite a job.
If you got alot of time on your hands this job would probably get it used up.
I don't have my book handy, but I think a series 3 diesel is the lowest produced diesel version. Harder to find than a series 4 diesel just no demand.
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Brian Jasper co. Ia
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Posted: 01 Apr 2011 at 2:48pm |
Doesn't the series 4 have a hollow input shaft for the trans with the PTO drive shaft being directly splined to the flywheel?
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"Any man who thinks he can be happy and prosperous by letting the government take care of him better take a closer look at the American Indian." Henry Ford
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Eddie(IL)
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Joined: 25 Apr 2010
Location: Oakwood, IL
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Posted: 02 Apr 2011 at 7:24am |
Thanks for all the responses guys...looks like the smartest thing for me to do is hope to find the real thing someday. There's nothing wrong with the Series III, and I have it down to just needing the paint work done at this point...finding a donor Series IV got me excited for a moment...too much coffee, I guess? Thanks again, Eddie
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Jordan(OH)
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Location: Celina, OH
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Posted: 02 Apr 2011 at 10:18am |
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Buy the series IV and find a good running gasser to stick in it.
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