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John Deere Tractors Discussion Forum

John Deere 8440

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Phil Hill

06-18-2013 00:41:36

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Can you replace a John Deere 8440 engine 6/466a with a John Deere 6081a engine.

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06-18-2013 15:50:07

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 Re: John Deere 8440 in reply to Phil Hill, 06-18-2013 00:41:36  
466A? Are you sure?

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Cliff Nelson

06-18-2013 18:27:31

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 Re: John Deere 8440 in reply to D-, 06-18-2013 15:50:07  
8440 is 466 with turbo and intercooler designated 466A.

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Phil Hill

06-18-2013 18:44:15

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 Re: John Deere 8440 in reply to Cliff Nelson, 06-18-2013 18:27:31  
It is a 6 cylinder 466 cu inch turbo aftercooler

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Phil Hill

06-20-2013 13:00:01

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 Re: John Deere 8440 in reply to Phil Hill, 06-18-2013 18:44:15  
Hello again, I have some more questions re the 6081 and 6466 engines.
1. Is the bolt up pattern on the back of the 6081 block the same as for the 6466.
2. Is the flywheel and crankshaft protrusion the same.
3. Is the flywheel/crankshaft bolt up pattern the same.
4. Does the 6466 water pump fit the 6081 block.
5. Is the external sump pattern on the 6466 the same as the 6081.

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