Parts Catalog for Early D4 (7U931)

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Dirtbiker1824

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Hello,
I scrubbed the tech library for a parts catalog for my D4 dozer with serial number 7U931, but the best I found covers 27570-44307. Anyone know where I could find this info? While I have many projects on-going with this dozer, the one I'm currently tackling is the starting engine. The block assembly is the "Devil Block" - big thanks to @squatch253 for documenting so much work on YT, and I'm worried the seals and gaskets that I need to order will be different between that block and what's listed in this parts catalog. I do know this starting engine is used on some D2's so I searched through those parts catalog and couldn't find any that called out the 4B666 block.

Thanks!

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Sun, Apr 23, 2023 11:55 PM

Rome K/G

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https://www.ebay.com/itm/264541970657?hash=item3d97ee20e1:g:QXYAAOSwdIZd19sx&amdata=enc%3AAQAIAAAAwHFUKAhpterM%2B9y2TBsMqHF8JreJtv71i7JmQ75Kpm%2B%2Fv1SSqVBT4xaO02Chr%2FwqDPZ%2F%2FV9MMDG8uPiamAjmSbWuNBDqjBbQwRx5achpwiK2ukMRF3ti4sDxlShyX4b4gtg3JCM7VWQP9VvPBHY4Ymu1ef3a4VWMDObY6RFOmZb5pH09s2k52H7ybSgdsWrCQLMi7I4ZD0WH2bFAIrK7a8YhSyIB6SKhdzQ3RtWNrlPJ5u%2B3Q2QEEMl6boabuSoCow%3D%3D%7Ctkp%3ABk9SR9De3PD1YQ

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Sun, Apr 23, 2023 11:57 PM

PNW.Hillbilly

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Shows up for me in the library:

[attachment=71951]parts.png[/attachment]

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Mon, Apr 24, 2023 12:31 AM

gemdozer

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Reply to PNW.Hillbilly:

Shows up for me in the library:

[attachment=71951]parts.png[/attachment]

In my microfiche the 4b666 and 4b671 is the same block

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Mon, Apr 24, 2023 3:40 AM

rax200

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Reply to gemdozer:

In my microfiche the 4b666 and 4b671 is the same block

Hi All,
I just scanned a better copy of the 7u1-up parts book last week and Deebo up loaded it in just search for 10506 that is the form number.

Regards

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Mon, Apr 24, 2023 4:10 AM

Dirtbiker1824

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Thank you all for posting these! Not sure why I missed these in my initial search....
Unfortunately none of these manuals list the block as 4B666 which is what's on my D4 - I suppose it was swapped out at some point. Does anyone know which parts manual would cover the 4B666 block assembly?

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Sat, Apr 29, 2023 2:23 PM

Deebo

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Reply to Dirtbiker1824:

Thank you all for posting these! Not sure why I missed these in my initial search....
Unfortunately none of these manuals list the block as 4B666 which is what's on my D4 - I suppose it was swapped out at some point. Does anyone know which parts manual would cover the 4B666 block assembly?

[quote="Dirtbiker1824 post=247775 userid=16071"]Thank you all for posting these! Not sure why I missed these in my initial search....
Unfortunately none of these manuals list the block as 4B666 which is what's on my D4 - I suppose it was swapped out at some point. Does anyone know which parts manual would cover the 4B666 block assembly?[/quote]
I’ve had a brief look through the D4/D2 parts catalogs and can’t see the “so called Devil block” listed as 4B666, nearest I see is 4B671. I’m never sure if the numbers on the actual castings correspond to the part numbers or are just casting numbers. Might be worth PMing Sasquatch as he’s done extensive YouTube (Squatch253 on YT) starting engine stuff. This link will get you started; https://youtu.be/eeR66ciRnDk
The good thing is a lot of parts for all these pony motors are totally interchangeable and you may find even if you find a parts catalog for that block someone may have changed the top cover or other things at some point.

[attachment=71975]649F870F-276F-4EF3-8EC4-6B5FD6371908.png[/attachment]

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Sat, Apr 29, 2023 6:47 PM

neil

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Reply to Deebo:

[quote="Dirtbiker1824 post=247775 userid=16071"]Thank you all for posting these! Not sure why I missed these in my initial search....
Unfortunately none of these manuals list the block as 4B666 which is what's on my D4 - I suppose it was swapped out at some point. Does anyone know which parts manual would cover the 4B666 block assembly?[/quote]
I’ve had a brief look through the D4/D2 parts catalogs and can’t see the “so called Devil block” listed as 4B666, nearest I see is 4B671. I’m never sure if the numbers on the actual castings correspond to the part numbers or are just casting numbers. Might be worth PMing Sasquatch as he’s done extensive YouTube (Squatch253 on YT) starting engine stuff. This link will get you started; https://youtu.be/eeR66ciRnDk
The good thing is a lot of parts for all these pony motors are totally interchangeable and you may find even if you find a parts catalog for that block someone may have changed the top cover or other things at some point.

[attachment=71975]649F870F-276F-4EF3-8EC4-6B5FD6371908.png[/attachment]

Dirtbiker, the casting number is not (necessarily) the part number. Your block has the tractor serial # on it so use the catalog posted above to find parts for your block. You don't have to overthink it : )

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Sat, Apr 29, 2023 8:54 PM

josh

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Reply to neil:

Dirtbiker, the casting number is not (necessarily) the part number. Your block has the tractor serial # on it so use the catalog posted above to find parts for your block. You don't have to overthink it : )

4B666 is the casting number, the block assembly is 4B671.

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Sun, Apr 30, 2023 3:18 AM

trainzkid88

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Reply to josh:

4B666 is the casting number, the block assembly is 4B671.

according my 6u parts book its the top cover and exhaust manifold thats different and thus a different gaskets for those parts. but the block itself is the same and it was only for the first 700 machines.
but that doesnt mean anything as the early machines could have been "upgraded" to the later setup. as it all just bolts on.

"i reject your reality and substitute my own" - adam savage. i suspect my final words maybe "well shit, that didnt work"

instead of perfection some times we just have to accept practicality

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Sun, Apr 30, 2023 7:07 AM

Dirtbiker1824

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Reply to trainzkid88:

according my 6u parts book its the top cover and exhaust manifold thats different and thus a different gaskets for those parts. but the block itself is the same and it was only for the first 700 machines.
but that doesnt mean anything as the early machines could have been "upgraded" to the later setup. as it all just bolts on.

Ah, this is good to know. I ended up getting that parts catalog off e-bay which seems to confirm what you all are saying. Very happy to have this book in physical form! The pony motor is on hold until I can find someone capable of boring out the cylinders to accept dry sleeves. I'm running into the same problem Squatch was having in that all the machines in my area are set up for v-blocks which can't handle the height of this opposing cylinder engine. If anyone knows of a solid machinist in the pacific northwest area, I'm all ears!
Currently working on the fuel delivery system which should keep be busy for a few weeks.

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Sun, May 7, 2023 11:15 PM

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