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70 diesel locking up


 
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Diesel Dude
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Joined: 18 Apr 2010
Posts: 65


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PostPosted: Wed May 08, 2013 7:24 am    Post subject: 70 diesel locking up Reply to specific post Reply with quote

Just had a 70 diesel dropped off to get looked at the complaint is that after the tractor is running for about 15-20 minutes it starts to die down and the lock up! it has a taper lock flywheel and it has zero end play do you think it is lack of end play causing this? The engine will spin free after it cools down. more info the engine was overhauled a few years ago .090 over new thrust bearings were replaced as well.looking for a good place to start i am thinking this taper lock is the smoking gun???? your thoughts please
 
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Greenday
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Joined: 08 Jun 2008
Posts: 1619
Location: NW Missouri

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PostPosted: Wed May 08, 2013 7:29 am    Post subject: Re: 70 diesel locking up Reply to specific post Reply with quote

Is there any way that diesel fuel can leak into the crankcase and thin out the oil?
 
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Blksmok
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Joined: 25 Nov 2012
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PostPosted: Wed May 08, 2013 9:02 am    Post subject: Re: 70 diesel locking up Reply to specific post Reply with quote

Diesel Dude.. Remove the flywheel and starting putting shims behind the thrust cover until you get .008 end play. I had one do that before and found out it spun a rod bearing. That"s an expensive repair.
 
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gtx1967jewison@yahoo.com
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PostPosted: Wed May 08, 2013 12:02 pm    Post subject: Re: 70 diesel locking up Reply to specific post Reply with quote

Ring end gap &/or pistons too tight......also the bronze style main bearings will sieze too but i think when that happens its curtains....
 
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gtx1967jewison@yahoo.com
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PostPosted: Wed May 08, 2013 1:42 pm    Post subject: Re: 70 diesel locking up Reply to specific post Reply with quote

Yes theres several ways & that happens too...
 
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rustcollector
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Joined: 21 Feb 2011
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PostPosted: Wed May 08, 2013 6:38 pm    Post subject: Re: 70 diesel locking up Reply to specific post Reply with quote

Have just been into a 720 diesel that lost the center main bearing oil line. Same behavior. The more you try to run the engine, the quicker it will lock up if that is the cause. Apparently this is a common occurrence with these engines. Evidence with this tractor is that this is the second center main oil line to be broken loose in it. Also have a 70 with the same affliction.
 
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