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John Deere Tractors Discussion Forum
Show Parts for Model:

Buickanddeere

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Tech 7

01-02-2018 12:00:16




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The post about the splitter hydraulics was getting tired so I started a new one......It seems Mannheim/Dubuque hydraulics are a topic which can be hard to grasp. Yes many people on here are talented but many are also users of the machines not repair experts.
I posted the kit number that would flow return oil back into the filter base ("supercharging the front pump" as one of my instructors called it) as a relativly simple way to let his set up work. I did not realize the tractor was plumbed in the (ideal)manner for a loader with an independent valve.
The kit I pointed out is called a motor return kit in some catalogs. The first I experienced its use would be somewhere around 1975 when my in laws bought a new 2130 and an 8 row planter. The motor return kit was installed at the dealers to allow for proper operation of the fertilizer cross auger. When this kit is in place the system can really work as it needs to.

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JD Seller

01-02-2018 13:25:46




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 Re: Buickanddeere in reply to Tech 7, 01-02-2018 12:00:16  
All the motor return kit is doing is bypassing the transmission/charge pump. So the main pump can pump at higher volume for longer periods of time. Returning the loader control valve the same way is doing the same thing.



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Tech 7

01-02-2018 13:59:03




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 Re: Buickanddeere in reply to JD Seller, 01-02-2018 13:25:46  
Exactly, as the transmission pump is quite low volume compared to the front pump.



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centash

01-02-2018 13:22:57




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 Re: Buickanddeere in reply to Tech 7, 01-02-2018 12:00:16  
I had one on a 2120 that we used on a automatic hay stooker, to run the orbit motor. that was years ago.
Ben



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