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Restoration & Repair Tips Board

John Deere 70 Diesel Crank shaft repair

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Robert Irwin

06-15-2012 14:12:21

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A couple weekends ago my flywheel became loose. The locking nut was in poor condition, but the threads on the crankshaft are not too bad. However, after buying a new locking nut, I could not get it on without the possibility of screwing up the nut threads so the end of the crank shaft needs to be re-threaded. A thread file will not work and I can not find a Die that big. Does anyone have the specs on the exact diameter of the threaded shaft and the exact size of threads. My best idea is to find a thread chaser to clean it up. Also, I took an end play measurement and found the end play with the clutch engaged is 3/8". The manual call for .005 - .010" should I be overly concerned about this amount of play and if so, is it just a matter of taking the flywheel & Thrust cover off and adding shims to reduce the end play?

Thank you,


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Nathaniel Watts

06-16-2012 17:00:55

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 Re: John Deere 70 Diesel Crank shaft repair in reply to Robert Irwin, 06-15-2012 14:12:21  
I think it has fiber thrust washers on both sides of the left main bearing.

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06-15-2012 20:29:56

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 Re: John Deere 70 Diesel Crank shaft repair in reply to Robert Irwin, 06-15-2012 14:12:21  
google taper loc flywheel your hope of fixing it

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