John Deere 70/730

These are the gas versions. Top one is from a 70, bottom is 730.
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Talking diesels here. 70 crank will work in a 720/730 but not a good idea to install a 720/730 crank in a 70. Centre bearing will not have pressure lubrication.
 
Information you may fined helpful...?

QUOTE:

Posted by kww900l on April 01, 2016 at 15:53:21

John Deere 70 diesel center main bearing

I recently acquired a 70 diesel that the crankshaft is broken at the flywheel on. I found a crankshaft and have seen posts about updating the center main bearing to a direct lube like the later 720 and was wondering if someone could tell me how to go about doing it

Pic's 1-2-3 are JD 70's:

Pics's 4-5-6 are JD 720's:

JD 70 SERVICE MANUAL:

SM-2017(1-56):

JD 720 SERVICE MANUAL:

SM-2020(12-57)

Bob...Retired Power Engineer....with NO experience in swapping JD "70" /"720"/730 Crankshafts...
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