3152 John Deere motor replacement

i have a JD300 Backhoe (maybe about 1966 vintage)
Serial number SNT 4W3D 022051T
i have been looking for a short block to fit
looks like block # T26935 - and the letter JD to the right and 0 below (it looks like)
unable to find a replacement with that exact #
does anyone know if any other block numbers will fit or where/how i could find that information?
other numbers i have seen start with R
thanks for any info.
bob

(quoted from post at 10:06:10 05/17/23) i have a JD300 Backhoe (maybe about 1966 vintage)
Serial number SNT 4W3D 022051T
i have been looking for a short block to fit
looks like block # T26935 - and the letter JD to the right and 0 below (it looks like)
unable to find a replacement with that exact #
does anyone know if any other block numbers will fit or where/how i could find that information?
other numbers i have seen start with R
thanks for any info.
bob

<img src=https://www.yesterdaystractors.com/cvphotos/cvphoto154750.jpg>

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Try using the part number from the parts catalog in your search, casting numbers are not always listed. Your JD dealer may have a list of 3152 block casting numbers that will interchange. The exact casting number is not always needed for one to fit.

Search John Deere 3.152 and John Deere 3152 rebuilt short block and call the places that show them. They can likely help you with the block number interchanges with the one they have.

This post was edited by Jim.ME on 05/17/2023 at 07:22 am.

Hello Bob welcome to YT! In the link is the part catalog Jim was directing you to. If the link takes you to the right page I have already chose the correct serial number range for your tractor, the split shown was 15,000; the block is PN 5 it gives 2 numbers there. You would have call a dealer to find out the differences between them. I did a couple searches and one of them showed one available from a lift truck parts company for $500 plus. No idea how legit they are or where they are. Have seen them show up lately on some other searches I made. When you click the part numbers it shows they are available from Deere for $7000 something.
JD JD300 parts catalog

they both sub to same number

Bob,

How are you searching? Have you tried using the part numbers from the parts catalog as I suggested in your original post about this engine? You posted you have a parts catalog and I gave you the link to the PC972 parts catalog in that post. Use the part number and some options come up, then call the places and ask about the casting numbers. They may or may not show casting numbers in ads. And as cannonball post the casting numbers may sub to the same part number now.

Have you talked with the machine shop, you said you had the head at, to see if they would give you an estimate to rebuild your engine?

This post was edited by Jim.ME on 05/18/2023 at 04:13 am.

Engine block for 820 or 830 Ag utility tractor will fit 300

(quoted from post at 22:23:02 05/17/23) Hello Bob welcome to YT! In the link is the part catalog Jim was directing you to. If the link takes you to the right page I have already chose the correct serial number range for your tractor, the split shown was 15,000; the block is PN 5 it gives 2 numbers there. You would have call a dealer to find out the differences between them. I did a couple searches and one of them showed one available from a lift truck parts company for $500 plus. No idea how legit they are or where they are. Have seen them show up lately on some other searches I made. When you click the part numbers it shows they are available from Deere for $7000 something.
JD JD300 parts catalog

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thanks for the great info. if i understand, the link you provided gave me 3 JD part numbers and 2 casting numbers R53240 and R55100, i have seen these casting numbers in my research before but no attached JD #.
i believe my old unit was like the 1st motor generation? but it seems to be the oldest stuff i can find. i was told the original jd # was 877 846 8243. research finds 2 of what appears to be the same motors except one has o-rings in the sleeve and the other o-rings are in the block. not necessarily trying to keep everything original. just really looking for a form, fit, function sort of thing and was just kind of looking for any/all motors that i could fit up. got no reason i couldn't use any motor that i could find that would fit. the machine shops i have found (2) that would work with me are at least 8 weeks out they say. and it seemed in my research so far that maybe motors out of 820, 1020, 300, or 350 might fit and Tx Jim says 820/830 would fit. when this started i was looking for a compatibility list that would say what fits were, didn't know if one existed or not, I'm new to this world but have seen them used in other places. everyone i have talked to so far wants to sell me only the exact same block # part (cause i think they don't know what will fit, just like me right now)
it's a project frame no wires, no instruments, lights, ignition switch, etc. so a free hand can be had by one and all. too long bob thanks all.

I think engine block part # AR97026 from a 2040 built for sales in N America that has a 3 cyl engine will fit a model 300
https://partscatalog.deere.com/jdrc/sidebyside/equipment/74688/referrer/navigation/pgId/107275

(quoted from post at 08:14:03 05/18/23)
I think engine block part # AR97026 from a 2040 built for sales in N America that has a 3 cyl engine will fit a model 300
https://partscatalog.deere.com/jdrc/sidebyside/equipment/74688/referrer/navigation/pgId/107275

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thanks for all the great suggestions they have been very helpful. i have been keeping a list of all possible motor substitutions i will check out in my search.

seems the front and rear profile of this small 3 cylinder block is kind of distinctive. a good question might be, are there any other blocks that appear to have the same profile but are only slightly different and would not fit. the yanmar diesel could not be mistaken and sure looks like NO fit. if there is nothing that looks close enough to the same profile that could be mistaken for desired target block then all the units i am seeing that seem to have the same profile might/would fit.

maybe might the perkins 3.152 fit. it seems to have the same profile?

seems the motor is connected to the flywheel housing that is the connection between the motor and the clutch housing so if i buy gasket R70483 and it mates correctly with the block then i should be good to go? so long as the over all length of block is correct.

thanks, bob

found rebuilt short block casting # T32339 o-rings in block motor

i think this should fit?

bob

Unless you want to make/fabricate custom adapters to go between the Perkins block and the rest of your driveline, As has been previously posted the Perkins [u:13c67df699]will not[/u:13c67df699] fit.

The block can have O-rings or not, you just need the sleeve style that matches the block O-ring style.

(quoted from post at 09:55:09 05/19/23)
found rebuilt short block casting # T32339 o-rings in block motor

i think this should fit?

bob

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Yes block with casting # T32339 should fit with no problems.

(quoted from post at 09:29:30 05/19/23)

(quoted from post at 09:55:09 05/19/23)
found rebuilt short block casting # T32339 o-rings in block motor

i think this should fit?

bob

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Yes block with casting # T32339 should fit with no problems.

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purchased ... picking up monday ... thanks for all the great help

as a retired machinist i have thought of that .... the thing would be the overall length ... under the right circumstances i would attempt such a thing as i have lots of fun project time available .... it just seemed that maybe that perkins was going to be more available ... however when i actually looked it really wasn't not sure why it seemed to overwhelm the search results ... but block problem solved .. now for a head .... thanks for all the help ...