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Military surplus 3500 generator engine in a D21
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pirlbeck View Drop Down
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Joined: 01 Dec 2009
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    Posted: 18 hours 47 minutes ago at 10:51pm
I have spoken for a rebuilt military surplus 3500 engine with the intentions of putting it in a D21 with series ll conversion that I have had sitting here way too long waiting for me to rebuild an engine to put in it. I am aware that the timing cover, the front engine plate and hydraulic pump drive will need to be swapped from the D21 engine to the new engine.

 I don't know if the rebuild engine has a crankshaft driven oil pump or the earlier cam driven oil pump, but  will the oil pan on a 3500 engine with the crank driven oil pump clear the D21 front axle without modification? 

This rebuilt engine also has a right angle tachometer drive coming out of the tach drive location on the block, so it either has the cam driven oil pump or some sort of stub tachometer drive.

I am also aware that I will need to swap a lot of the engine accessories, most of the fuel system, along with the rear engine plate and flywheel. 

I would like to to look as close to "stock" as possible so I plan on using the D21 parts wherever possible.

Any other possible surprises that I may not be thinking of?

Thanks!


Edited by pirlbeck - 18 hours 22 minutes ago at 11:16pm
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PeteMN View Drop Down
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Points: 206 		Post Options Post Options   Thanks (0) Thanks(0)   Quote PeteMN Quote  Post ReplyReply Direct Link To This Post Posted: 18 hours 22 minutes ago at 11:16pm
Steve Fisher probably knows as much about those military engine conversions as anyone.  He sold a bunch of them.
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Strip it down to a long block, and go back with the D21 parts as needed. They are both the early style blocks. 
210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers!
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Michael V (NM) View Drop Down
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I was gonna do this with my 220,, but,,with the help of this forum , hav pretty much figured out that it more than likely has the original engine,, so I'm jus gonna rebuild it..
That being said,, I now have one of these military rebuilds for sale,, still in the crate...
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if the engine conversation is about the unit Lad/orange knight had listed, this should be the engine tag.. Would not that tag be toward the end of the series? Thanks...Dale

Edited by orangereborn - 3 hours 35 minutes ago at 2:03pm
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If you want the original Allis Chalmers engine tag on the military block, we stock both the tags and the rivets so it looks original
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pirlbeck View Drop Down
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Originally posted by injpumpEd injpumpEd wrote:

Strip it down to a long block, and go back with the D21 parts as needed. They are both the early style blocks. 

We have put 2900 combine engines in tractors before, so I know there is a fair amount of parts transferring to be done.

Thanks for the help!
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pirlbeck View Drop Down
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Originally posted by Michael V (NM) Michael V (NM) wrote:

I was gonna do this with my 220,, but,,with the help of this forum , hav pretty much figured out that it more than likely has the original engine,, so I'm jus gonna rebuild it..
That being said,, I now have one of these military rebuilds for sale,, still in the crate...

My block has a hole in it behind the hydraulic pump so there is no rebuilding it. When I bought the tractor it came with a short block that looks like it has sat outside with not head on it. My intention was always to just rebuild it, but as expensive as parts and machine work are I think this rebuilt engine will be a cheaper way to go.

Thanks for your input! 
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pirlbeck View Drop Down
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Originally posted by orangereborn orangereborn wrote:

if the engine conversation is about the unit Lad/orange knight had listed, this should be the engine tag.. Would not that tag be toward the end of the series? Thanks...Dale

 
Yes, the engine is the one in the classified here listed by Lad. 

Besides the factory style tag on the rear LH corner of the block, the picture also shows another tag farther forward on the LH side........maybe this tag has some rebuild SN or component information. If it is that late of production engine, would it likely have piston cooling jets in it?

Thanks for your help!
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pirlbeck View Drop Down
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Originally posted by Kcgrain Kcgrain wrote:

If you want the original Allis Chalmers engine tag on the military block, we stock both the tags and the rivets so it looks original

I will keep that in mind, depending on how original it ends up looking. Can you stamp the tag?
Thanks!
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Michael V (NM) View Drop Down
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Originally posted by pirlbeck pirlbeck wrote:

Originally posted by Michael V (NM) Michael V (NM) wrote:

I was gonna do this with my 220,, but,,with the help of this forum , hav pretty much figured out that it more than likely has the original engine,, so I'm jus gonna rebuild it..
That being said,, I now have one of these military rebuilds for sale,, still in the crate...


My block has a hole in it behind the hydraulic pump so there is no rebuilding it. When I bought the tractor it came with a short block that looks like it has sat outside with not head on it. My intention was always to just rebuild it, but as expensive as parts and machine work are I think this rebuilt engine will be a cheaper way to go.

Thanks for your input! 


Well,, a hole in the block don't leave much choice mine still run,, although it's really tired,,
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pirlbeck View Drop Down
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Points: 242 		Post Options Post Options   Thanks (0) Thanks(0)   Quote pirlbeck Quote  Post ReplyReply Direct Link To This Post Posted: 1 hour 48 minutes ago at 3:50pm
Originally posted by Michael V (NM) Michael V (NM) wrote:

Originally posted by pirlbeck pirlbeck wrote:

Originally posted by Michael V (NM) Michael V (NM) wrote:

I was gonna do this with my 220,, but,,with the help of this forum , hav pretty much figured out that it more than likely has the original engine,, so I'm jus gonna rebuild it..
That being said,, I now have one of these military rebuilds for sale,, still in the crate...


My block has a hole in it behind the hydraulic pump so there is no rebuilding it. When I bought the tractor it came with a short block that looks like it has sat outside with not head on it. My intention was always to just rebuild it, but as expensive as parts and machine work are I think this rebuilt engine will be a cheaper way to go.

Thanks for your input! 


Are you in New Mexico? I am going to be driving through there in a couple of weeks.
Well,, a hole in the block don't leave much choice mine still run,, although it's really tired,,
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pirlbeck View Drop Down
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Points: 242 		Post Options Post Options   Thanks (0) Thanks(0)   Quote pirlbeck Quote  Post ReplyReply Direct Link To This Post Posted: 14 minutes ago at 5:24pm
Originally posted by orangereborn orangereborn wrote:

if the engine conversation is about the unit Lad/orange knight had listed, this should be the engine tag.. Would not that tag be toward the end of the series? Thanks...Dale

Lad sent me a picture of the tag and as you stated, it is the same date of MFR and the same engine SN as your picture above. Is the date of MFG and the engine SN the original one from Allis when the engine was built? I would think it would be.

Anyone know what the A suffix means in the model number?

The other tag shows the rod and mains as being .010 & .010 and overhauled at OSMS, OREGON

Thanks!
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