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John Deere Tractors Discussion Forum
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JD 630, 3pt draft links rusted

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Barry - Michiga

04-30-2007 10:44:57




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I have just acquired a late production JD 630 that I have started the disassembly part of the restoring process and have already come across a �stumper� problem.
The sliding bars inside of both draft link arms are rusted to the point that they will not come out. The lock pins and tubes were completely full of dirt and rust, but I was able to press the pins out. Before going the route of an expensive replacement of the complete draft link assemblies,
I figure that I have nothing to loose, except some time to try to resolve the problem.

My first step would be to �saw cut� the draft link tube just beyond the length of the inside bar, then using the press or air hammer to force the bar out, then re-weld the tube once resolved. Can anyone tell me what the length of the bar is?

If the fist step didn�t succeed, I would then make a full length �saw cut� to one side of each tube. I know this would allow for removal of the bar, but my concern would be slag or weld getting inside the tube at time of re-weld.

Any experience out there to this approach? Any comments or suggestions will be greatly appreciated. Thanks, Barry

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Gary from Muleshoe

04-30-2007 19:11:31




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 Re: JD 630, 3pt draft links rusted in reply to Barry - Michigan, 04-30-2007 10:44:57  
A friend of mine deals with this kind of thing all the time. He says he just heats it up all over, then run water over it and it will break it loose. He is nearly 80 yrs old and been doing this sort of stuff all his life. I trust his wisdom.



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Ten-Twenty

04-30-2007 11:17:30




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 Re: JD 630, 3pt draft links rusted in reply to Barry - Michigan, 04-30-2007 10:44:57  
Barry,

I think I would try some heat and lots of penetrant. Be patient, soak (for several days) the arms in penetrant and then apply heat (to burn away the rust inside the tubes) and light tapping to set up a vibration. Also, try to figure out a way to use hydraulic pressure to help start the arms moving.



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Mike M

04-30-2007 11:15:22




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 Re: JD 630, 3pt draft links rusted in reply to Barry - Michigan, 04-30-2007 10:44:57  
Soak them in a barrel of something like fuel oil ? until the rest of the restoration is done. Time will be on your side. I have then hammered on the sides of them and hook a clevis and chain on each end then go find an old tree stump to pull on. If it still won't go take and apply some heat to the outside tube and then try pulling it apart again.



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mjbrown

04-30-2007 11:12:15




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 Re: JD 630, 3pt draft links rusted in reply to Barry - Michigan, 04-30-2007 10:44:57  
I think I would not cut and reweld unless it is an absolute necessity. I would soak in kerosene for a while and if the 630 runs, chain to a tree through the ends of the lower links and heat it good with a rosebud and pull like hell on it.



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2cylinderlp

04-30-2007 14:26:54




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 Re: JD 630, 3pt draft links rusted in reply to mjbrown, 04-30-2007 11:12:15  
I think I'd be careful pulling on it this way. That front end could go airborn real quick. Maybe take another tractor with a chain and give it a tug.



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mjbrown

04-30-2007 15:06:46




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 Re: JD 630, 3pt draft links rusted in reply to 2cylinderlp, 04-30-2007 14:26:54  
The front shouldn't come up with the lower links down parallel to the ground any more than pulling a three point plow but setting the brakes and pulling with another tractor is a good idea.



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Barry - Michigan

04-30-2007 12:01:36




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 Re: JD 630, 3pt draft links rusted in reply to mjbrown, 04-30-2007 11:12:15  
Twenty-Twenty, MikeM and MjBrown. Thanks for the quick reply. Your suggestions are well taken and soaking in something first seems like a much better first step.

Your comment "time is on your side" sure hits the problem that us new restorers have; getting it through our heads that this is not a "got to get it finished ASAP to get the tractor back working in the fields"! I'll keep working on it.

Thanks again, Barry

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