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John Deere Tractors Discussion Forum
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1020 hydraulics problem

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Bill Grimley

11-22-2003 18:51:09




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Trying to install a Woods loader on a 1020, think it's plumbed like it should be, have return line going to transmission filter cover. But when I have loader hoses connected, three point will not raise except when loader valve is moved so as to raise bucket, but bucket won't raise at all. Loader hoses flex some, but that's it. Three point lift works fine with rockshaft control lever alone if loader hoses are disconnected. If Woods loader valve is for open center hydraulics, could that be causing these problems? What would look different about valve body and hose connections, closed center valve versus open center? Maybe I need to bleed something? Thanks in advance to anyone with possible solutions.

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rem0h

11-23-2003 19:36:01




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 Re: 1020 hydraulics problem in reply to Bill Grimley, 11-22-2003 18:51:09  
I have a service manual that states the 1020 has a closed center, constant pressure, hydraulic system. - hope this helps -



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Bob

11-23-2003 10:45:17




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 Re: 1020 hydraulics problem in reply to Bill Grimley, 11-22-2003 18:51:09  
A 1020 IS open center hydraulics. Where are you tapping into the system for your oil source for the loader?

I think Deere may have made a "Power Beyond" kit for the hydraulics on these... they did for the 2010. This, if available, would provide a source for oil flow for a loader without affecting the other hydraulic functions of the tractor. I am away from my parts books for the weekend, and cannot look this up at the moment.

Do you have rear couplers you can hook lines from the loader to, and then tie the hydraulic lever in position to provide oil for the loader valve?

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Bill Grimley

11-23-2003 15:04:33




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 Re: Re: 1020 hydraulics problem in reply to Bob, 11-23-2003 10:45:17  
Thanks everybody for the comments. I do have one set rear couplers - but I teed in to that pressure line for loader inlet, then connected loader return to previously existing fitting on transmission filter housing. My plumbing looks identical to another 1020 with JD 48 loader near here - that's what makes this so puzzling. My 1020 had a JD loader before (was sold off it before I got it) that was plumbed same places where I plumbed - it was working ok so far as I know. I was expecting the new Woods loader (their model number 1020, by coincidence) to not effect the three point lift operation and I wanted to reserve the rear couplers for an implement cylinder, so didn't want to use rear couplers for loader. The loader was ordered from Woods with the understanding that it would be put on a 1020, so knowing how something can go wrong with a special order, that's what makes me suspicious about the loader valve. Guess maybe I should call Woods. Any further suggestions would be appreciated.

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Bob

11-23-2003 16:34:27




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 Re: Re: Re: 1020 hydraulics problem in reply to Bill Grimley, 11-23-2003 15:04:33  
Sorry for the incorrect information on the 1020 hydraulics. It is, indeed, a closed center system, and therefore it certainly would seem that you were supplied with the incorrect valve with your loader.



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Bill Grimley

11-24-2003 17:15:28




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 Re: Re: Re: Re: 1020 hydraulics problem in reply to Bob, 11-23-2003 16:34:27  
Finally got things straight: 1. Loader valve did not have correct plug installed in power beyond tap for closed center hydraulics tractor; 2. Hoses from tractor to valve got switched by mistake (by me) on new install, compounding the problem. This could have damaged the valve when I tried to raise the bucket, but apparently didn't because of number 1 problem.
Called Woods tech support also - very helpful.
Thanks again to all.

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david val

11-23-2003 12:59:05




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 Re: Re: 1020 hydraulics problem in reply to Bob, 11-23-2003 10:45:17  
as far as i know, 1020 had closed center hydraulics. older north american machines could have open center power steering with an extra gear pump. 1010 though had an open center system.
david



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david val

11-22-2003 22:41:51




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 Re: 1020 hydraulics problem in reply to Bill Grimley, 11-22-2003 18:51:09  
as you posted, the loader valve is probably open center and not plumped correctly. some valves are convertible. pressure inlet is usually where the relief valve is (the relief valve should be set to max pressure). in convertible valves the open center return port is opposit the pressure port, while the closed center port is aside. the unused port is plugged.
david



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