RD-8 crankshaft part numbers

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Jeremy Williams

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Can anyone verify the updated or previous numbers for a tractor with number 1H11xx? My book shows 7B9578 but would like to know if a crank with number of 3H2249 would work.

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Jeremy

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Tue, Dec 22, 2015 3:48 AM

josh

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7B9578 does cross to 3H2249.

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Tue, Dec 22, 2015 5:03 AM

Jeremy Williams

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Reply to josh:

7B9578 does cross to 3H2249.

Thank you Josh. I checked with 2 different dealers today and neither could seem to get past the "discontinued" word. Thanks a bunch.

Jeremy

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Tue, Dec 22, 2015 7:01 AM

Rome K/G

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Reply to Jeremy Williams:

Thank you Josh. I checked with 2 different dealers today and neither could seem to get past the "discontinued" word. Thanks a bunch.

Jeremy

I have a crank in block yet from a 1H1111 tractor that i parted out. Not sure what the part # is. is yours one piece forged or does it have the bolt on balancer weights?

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Tue, Dec 22, 2015 7:24 AM

Old Magnet

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Reply to Jeremy Williams:

Thank you Josh. I checked with 2 different dealers today and neither could seem to get past the "discontinued" word. Thanks a bunch.

Jeremy

Looks like 3H2249 has it's own bearing requirements.
6-3H6669 Bearings
1-3H3441 Bearing
1-7F6395 Thrust washer
1-4F7815 Special woodruff key

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Tue, Dec 22, 2015 7:25 AM

Jeremy Williams

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Reply to Old Magnet:

Looks like 3H2249 has it's own bearing requirements.
6-3H6669 Bearings
1-3H3441 Bearing
1-7F6395 Thrust washer
1-4F7815 Special woodruff key

Rome/KG- If I remember correctly I think mine is a one piece crank. I do not recall seeing bolt on counter weights.

Old Magnet- Thank you for the part numbers. I figured I would have to machine my own. I changed one in this tractor already, and finding that one was almost impossible. With the part numbers I will keep my eyes peeled for them.

Jeremy

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Tue, Dec 22, 2015 8:30 PM

Andrew

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Reply to Jeremy Williams:

Rome/KG- If I remember correctly I think mine is a one piece crank. I do not recall seeing bolt on counter weights.

Old Magnet- Thank you for the part numbers. I figured I would have to machine my own. I changed one in this tractor already, and finding that one was almost impossible. With the part numbers I will keep my eyes peeled for them.

Jeremy

If you're rd8 serial number is below about 2000 it should have a gear driven fan.
After about 1h 2000 they went to belt driven fan. Don't hold me to those numbers as they are approximat from memory.
The cranks changed with the engine design change .
Attached is photos of the two cranks.
I see no reason why the later crank can't be machined to fit the earlier engine block?
If you can't find the correct one. .
Attachment