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John deere 720


 
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whippin
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Joined: 22 Jul 2012
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PostPosted: Sun Jul 22, 2012 11:44 am    Post subject: John deere 720 Reply to specific post Reply with quote

We bump start it , one day in process of starting it picked up a vibration. Clutch assembly for torn apart yet, then put back together everything seemed okay. Check flywheel on the other side, we have a taper lock flywheel on on. Everything seems well there everything seems to be tight like it should be. what what am I missing that would be causing the vibration? 72460 15945
 
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John T
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PostPosted: Sun Jul 22, 2012 3:54 pm    Post subject: Re: John deere 720 Reply to specific post Reply with quote

If you remove the clutch drive disk assembly be sure to get it installed back in time on the crank (may have V marks) otherwise that in itself can cause a good vibration. Its heavy weighted side must be 180 opposite from the flywheels heavy weighted side or its vibration city.

John T
 
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whippin
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PostPosted: Sun Jul 22, 2012 4:37 pm    Post subject: Re: John deere 720 Reply to specific post Reply with quote

John T wrote:
(quoted from post at 16:54:09 07/22/12) If you remove the clutch drive disk assembly be sure to get it installed back in time on the crank (may have V marks) otherwise that in itself can cause a good vibration. Its heavy weighted side must be 180 opposite from the flywheels heavy weighted side or its vibration city.

John T



Thank you very much I did remove it but didn't look for a mark.
 
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John T
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PostPosted: Sun Jul 22, 2012 6:42 pm    Post subject: Re: John deere 720 Reply to specific post Reply with quote

If you cant find any v marks, look (maybe need mirror) at the flywheels inside and find its heavy counterweight and set the clutch drive disk weight 180 opposite from that. If those weighta arent 180 opposite she shakes badly.

John T
 
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Mike Aylward
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PostPosted: Tue Jul 24, 2012 8:44 am    Post subject: Re: John deere 720 Reply to specific post Reply with quote

John, I don't believe you will see a V-mark on that tractor. I believe it is internally balanced with no counterweight on the clutch driver, so no need for it to be timed. Mike
 
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John T
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PostPosted: Tue Jul 24, 2012 10:38 am    Post subject: Re: John deere 720 Reply to specific post Reply with quote

Thanks, I didnt know when they changed from the old method........

John T
 
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