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Tractor Talk Discussion Forum

Hot Hydraulics

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phil lowe

06-03-2006 04:52:59




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His guy's got a question regarding hyrdaulics .My brother has a skidder (Treefarmer)and he bought a woodsplitter that he hooks into one of his front arm control valves ,,He ties the valve open so he gets pressure to run the splitter ,,he was splitting the other day and after bout 3 1/2 hours ghe said the lines and splitter valve were so hot they were smoking ...My thoughts is fluid id only traveling distance it takes to fill cylinder every stroke and not going back to resourvor,,but he's 3 hours away and just explaining things over phone ...and I ain't no hydraulic wiz by any means ,,and comments,suggestions Phil in the Very Rainy east coast Canada

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mowr

06-03-2006 21:07:05




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 Re: Hot Hydraulics in reply to phil lowe, 06-03-2006 04:52:59  
So hot the hoses are smoking is TOO hot! Almost certainly his arrangement is overriding the pressure relief valve most, if not all of the time. Very likely to burn-and-blow some o-rings in the hydraulic system and may burn-and-blow one of those hoses. OUCH!!! Suggest he call tech support of the skidder manufacturer as well as that of the splitter and find the problems/solutions before continuing.

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Coloken

06-03-2006 07:11:57




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 Re: Hot Hydraulics in reply to phil lowe, 06-03-2006 04:52:59  
Yes, he might have restrictions that build up heat, but I am with Allan. Any hydraulic system that runs continuous at power needs a cooler. Take a break and let it cool off.



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Paul Janke

06-03-2006 06:57:18




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 Re: Hot Hydraulics in reply to phil lowe, 06-03-2006 04:52:59  
It sounds like he is going straight to the valve on the skidder which is good. I am guessing that the problem is from friction in lines which are too small and too long going to and from the splitter. Shorter and bigger lines are much better. Large quick couplers also help. It can also help to run the return line from the splitter back to the skidder somewhere after the valve like directly to the reservoir. It is best to make sure there is still a filter in the circuit, even if it is on the splitter.

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Allan In NE

06-03-2006 06:22:56




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 Re: Hot Hydraulics in reply to phil lowe, 06-03-2006 04:52:59  
Phil,

He runs it for 3 1/2 hours and the oil is hot? Sounds pretty normal to me.

Allan



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J Schwiebert

06-03-2006 05:57:53




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 Re: Hot Hydraulics in reply to phil lowe, 06-03-2006 04:52:59  
First of all make sure the two hydraulic systems are compateable. In other words if one has a closed center control valve and the other one an open center you are asking for trouble to start with. What caused the problem most likely is one of two things. He has an open center system and the oil went over the relief valve or he has a closed center system and now the valve on the splitter is open center and the pump is pumping fluid all the time. We need more information.

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phil lowe

06-03-2006 11:47:15




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 Re: Hot Hydraulics in reply to J Schwiebert, 06-03-2006 05:57:53  
can't give whole lot more info as I'm few hours away and being hydraulicly term iliterate ,don't know the valving to even begin to try and explain it to him ...I did say I thought he should send return line back to resourvour dirrectly and also suggestted not running it so long.. needing a hydraulic coarse in the maritimes
Phil any www sites or articles that I can start learning more on would be nice thanks

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JMS/MN

06-04-2006 18:55:40




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 Re: Hot Hydraulics in reply to phil lowe, 06-03-2006 11:47:15  
John Deere publishes a FOS Manual- Fundamentals Of Service- on Hydraulics. Gives a good explanation of basic hydraulics, open and closed center systems. Go online for their pubs, or write JD Svc. Publications, Dept. F, JD Rd, Moline, Ill. 61265. Running that hot is not normal- something is running long and hard to create that heat, rather than releasing and bypassing. Maybe open center valves on a closed system, or opposite.

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