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John Deere Tractors Discussion Forum
Show Parts for Model:

Re: 3020 hydraulics

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Author  [Modern View]
MSM

12-12-2013 15:32:59
70.192.219.170



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If the loader is plumbed into the remotes,one of your couplers may be worn out and not unseating the tips, or the coupler lock may have turned, and partially released the coupler. The 3 pt cable probably froze, it may free up when it warms up, but I would replace it. If it got water in it and froze once,it will do it again.




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Dennis430

12-12-2013 15:50:23
70.197.213.52



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 Re: 3020 hydraulics in reply to MSM, 12-12-2013 15:32:59  
So the issues are not connected. I'm not sure what to look for in the couplers. Should I disconnect them, reattach and see what happens? I didn't know the 3pt was a cable system. I guess I have more stuff to take apart. I've got a basic understanding of how things work; this is my first tractor. Thanks again, DC



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D-

12-13-2013 07:58:14
166.137.12.93



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 Re: 3020 hydraulics in reply to Dennis430, 12-12-2013 15:50:23  
Not the couplers. If console tractor you have bad valve/valves. If you can switch sides problem should change to bucket so you will know for sure.



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Dennis430

12-14-2013 16:01:21
70.197.201.248



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 Re: 3020 hydraulics in reply to D-, 12-13-2013 07:58:14  
The loader is plumbed from under the cowling. The bucket is hooked up to the remotes by the rear PTO. There are manifolds on both sides for the loader. I'm guessing the problem is under the cowling at a valve assembly controlled by the loader lever. I appreciate everyone's help, but some of the replies are over my head. Should I just replace the control lever valve? Probably expensive. I don't know what the term "spool" means. Thanks again, DC

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buickanddeere

12-14-2013 20:04:01
209.240.119.130



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 Re: 3020 hydraulics in reply to Dennis430, 12-14-2013 16:01:21  
I'm sorry but I'm not sure how that works.



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Tx Jim

12-14-2013 16:38:22
69.35.160.115



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 Re: 3020 hydraulics in reply to Dennis430, 12-14-2013 16:01:21  
Dennis430

If you could post some photos showing how loader hyd attach to tractor someone on this forum can help solve your tractor & loaders hyd problem. A spool is parts key #21

Jim


This post was edited by Tx Jim at 16:39:37 12/14/13.



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D-

12-15-2013 07:04:49
166.137.12.34



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 Re: 3020 hydraulics in reply to Tx Jim, 12-14-2013 16:38:22  
Possibly he has those couplers that are on each side under the cowling handles. Were on older tractors (I thought 10 series but possibly early 20 series also) for loader hookups.
In that case it could be the couplers since there was no lever to hold the balls open. Those valves were not as problematic as those on console tractors.



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buickanddeere

12-15-2013 10:52:29
209.240.119.130



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 Re: 3020 hydraulics in reply to D-, 12-15-2013 07:04:49  
Quoting Removed, click Modern View to see
If the loader was connected to a joystick and supplied direct with a T in the high pressure line. And implements plugged into the scv(s).What would make which hydraulic cylinders drift ?



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Tim S

12-15-2013 11:13:37
68.75.24.151



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 Re: 3020 hydraulics in reply to buickanddeere, 12-15-2013 10:52:29  
Exactly,,, This is a problem that is simple to sort out but it has been complicated by several different ideas as to what is going on....that being said,, "If" it has a joy stick or a double stick valve working the loader functions and the loader "drifts up", then the only possible thing it could be is the loader valve is leaking past the spool. and it don't matter "where" your getting the supply from...and as we have always stated the best way to hook a loader control up is plumbing into the main supply line for pressure,,and returning through a ported filter bowl and using a separate valve for loader control.

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Tx Jim

12-15-2013 11:31:12
69.35.160.188



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 Re: 3020 hydraulics in reply to Tim S, 12-15-2013 11:13:37  
I think the loader on this 3020 tractor is scv controlled not ind 2 spool valve controlled.



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buickanddeere

12-15-2013 16:34:10
209.240.119.130



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 Re: 3020 hydraulics in reply to Tx Jim, 12-15-2013 11:31:12  
Quoting Removed, click Modern View to see
I agree that the loader is currently controlled from dash operated SCV's. I was just wondering instead of the time and $$$ rebuilding the dash mounted SCV valves .And rebuilding the worn couplers at the back.
Maybe it would be time and cost effective to go with a joystick instead of repairs?



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Tx Jim

12-15-2013 07:20:55
69.35.163.57



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 Re: 3020 hydraulics in reply to D-, 12-15-2013 07:04:49  
D-

You're probably correct.I'd forgotten about those type of couplers.



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