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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum
:

1855 Hydraulic Issue on Hydraulic Remotes

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JimUHP

03-15-2019 06:46:28




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Hello to all the master Oliver Mechanics.. I have a 1855 Oliver that has a problem on both of the rear hydraulic remotes. Each act a bit different but I believe same problem... Issue is as follows:

When I operate a cylinder, it will operate fine for several cycles and then all the sudden it will not retract. hydraulics will just squeal as if it can't over come the load to retract. However their is no load. The directional control valve level will move but it seems like there is something in the remote stack that will not allow the fluid to let the fluid retract. If you go back and forth several times with remote lever it will start retracting at some point. I have completely disassembled this dude thinking I would find something on poppets or seats or plunger but they look decent.. See notes 1,2, 3 on pic attached.. One thing I noticed is the o'rings on the seats are not the greatest but they were not cut. Could they be leaking just enough to cause?

Second item I noticed was the cross hole on the retainer where the ball seats seemed beat up some.. which is note #4. I have also tried to attach a close up picture of this. Outside of this I can't find anything..
I tried to be very detailed in hopes one of you masters can help me along to some bright improvement here. Thank you in advance! Jim




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2-strokeDD

03-16-2019 19:33:10




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 Re: 1855 Hydraulic Issue on Hydraulic Remotes in reply to JimUHP, 03-15-2019 06:46:28  
The first thing to do is replace the male hyd . tips with a good one at least an 8010 pioneer or equivalent . Many times when a cylinder won't retract it is because either the male or female tip is bad . Under a high flow situation the ball in the tip will backseat and lock up not allowing any oil flow. You can screw the lowering restrictor on the remote in to slow the flow down to see if that helps. But in my experience putting on new tips will most always fix the problem.

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JIMUHP

03-17-2019 04:53:53




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 Re: 1855 Hydraulic Issue on Hydraulic Remotes in reply to 2-strokeDD, 03-16-2019 19:33:10  
I agree this is a good basic step but I have done this.. Sorry for not including in the post originally..



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jh105

03-16-2019 18:45:37




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 Re: 1855 Hydraulic Issue on Hydraulic Remotes in reply to JimUHP, 03-15-2019 06:46:28  
My 1755 does something similar. When I push lever forward to lower implement it will just catch or lock up and not lower. If I pull lever back to raise and then back forward it usually works. This happens quite a bit and gets frustrating especially when doing dirt work with a speed mover. If you discover the problem and the fix, please share. I sure would appreciate it.



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JIMUHP

03-17-2019 04:54:57




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 Re: 1855 Hydraulic Issue on Hydraulic Remotes in reply to jh105, 03-16-2019 18:45:37  
This was exactly why I thought it would be worth posting this in this forum. For sure I will share once we find the issue.



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IanC

03-15-2019 17:40:19




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 Re: 1855 Hydraulic Issue on Hydraulic Remotes in reply to JimUHP, 03-15-2019 06:46:28  
there are two different valves ones, and you have one that are on the outside but diffent inside. I remember the poppets were both tooked the same but were different size.



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JIMUHP

03-17-2019 04:58:24




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 Re: 1855 Hydraulic Issue on Hydraulic Remotes in reply to IanC, 03-15-2019 17:40:19  
I did look over the poppets very close.. One thing I did notice is that one of the seats is not super great but it's on the directional control that is better than the other one from the way it acts.. I am going to re-machine this one and clean it up. Any other idea's are appreciated. Thanks,
Jim



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JIMUHP

03-17-2019 04:52:58




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 Re: 1855 Hydraulic Issue on Hydraulic Remotes in reply to IanC, 03-15-2019 17:40:19  
OK.. So what do I do to fix the issue?



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