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John Deere Tractors Discussion Forum
:

7520 Hydraulics

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newgenjdcollector

08-14-2019 08:13:02




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Is there any particular reason what I couldn't do this in order to eliminate all the dumb hoses and old valves under the cab?
The 7520 Rockshaft housing is the same as a 4630 so I'm thinking this should be easy or am I missing something. And if so, why did they use the dummy couplers in the first place?


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fdt860

08-15-2019 09:59:38




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 Re: 7520 Hydraulics in reply to newgenjdcollector, 08-14-2019 08:13:02  
If you want the Lh plate that goes between rockshaft and scvs tthat double them and make it a quad hydraulics, I think only 4wd 50 series and up add them?

I could be wrong but this is very unimportant.



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newgenjdcollector

08-15-2019 07:38:04




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 Re: 7520 Hydraulics in reply to newgenjdcollector, 08-14-2019 08:13:02  
Any reason why the 55 series as opposed to the 20/30 series plate? I thought 40 and later plates were a little different.



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newgenjdcollector

08-15-2019 07:36:30




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 Re: 7520 Hydraulics in reply to newgenjdcollector, 08-14-2019 08:13:02  
Quoting Removed, click Modern View to see

I may need to get creative in order to get the L&D to work. On the 75 it is just a manual lever with a notched plate. If I can't make it work from the cab, no big deal, I can leave it off.
I also am working on an ingenious method to be able to shift the 75s hi/lo trans from the quad shift levers rather than mounting the big ol lever in the cab somewhere.

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fdt860

08-14-2019 15:43:05




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 Re: 7520 Hydraulics in reply to newgenjdcollector, 08-14-2019 08:13:02  
There is no creative plumbing to be done. The rockshaft already has oil. You may also use the plate manifold to get 4 scv from 4055 series?

I dono think that you miss anything. 8 believe that at the ime Deere was probably unsure about cables for scvs.



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Tim S

08-14-2019 14:49:53




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 Re: 7520 Hydraulics in reply to newgenjdcollector, 08-14-2019 08:13:02  
Will the load/depth arm match up??



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newgenjdcollector

08-14-2019 10:06:51




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 Re: 7520 Hydraulics in reply to newgenjdcollector, 08-14-2019 08:13:02  
The 8640 cab I'm putting on already has all the cable controls with it, so should be relatively straightforward.



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MSM

08-14-2019 08:40:39




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 Re: 7520 Hydraulics in reply to newgenjdcollector, 08-14-2019 08:13:02  
I replaced a damaged rockshaft housing 20+years ago and i am pretty sure i used a 4620 housing. Don't see why it wouldn't work with some creative plumbing and some morse cables to control the hitch and remotes.



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