wood splitter hydraulics again

firhead

Member
I think I'm narrowing this down, but I'm still not in operation. Just don't know my hydraulics. The Deere dealership says I definitely need a closed center valve for my 2630 - and is quite willing to sell me a Cross SBA2-CC. The Northern Hydraulics help line guy said the splitter should work with the open center valve I already have - and he COULD have sold me a SBA2-CC. Then I talked to someone else that said I just might have a semi-clogged filter - letting enough fluid to raise the lift arms but not allowing sufficient volume of fluid to keep circulating through the open center valve circuit on the splitter. Meanwhile, I go to remove the filter (a place I've never been before) and I find two valve heads, one coming out of the filter cover and the other coming out of ? One looks like a conventional male hose end and the other maybe a JD female end. See picture. What are these and do they have anything to do with the work around some people are suggesting? I bought this tractor about a year ago. Fluid's topped up and clean and nothing makes any weird noises under load.
I will get this - just need some wisdom I don't have yet. Thanks.
Please bear with me about picture - will post it later this evening when my IT expert (wife) helps me.

Cliff
 
OK - hopefully here's picture of what I'm wondering about
a250274.jpg
 
The fitting you are looking at are for a loader hook up,, they mean nothing to what you are doing,, and you are listening to too much info from people that don't know what they are talking about...so listen to this: 1: your valve is open center which means the oil is flowing through it all the time that the lever is in nuetrul. 2: your tractor is a closed center system which means the oil pressure builds up to a valve and "kicks out" much like the water system in your house..when the oil keeps on flowing through your open center valve it makes the pump work all out trying to catch up, this lets the pump run out of oil to pump (cavitation) and you will loose oil pressure plus heat the oil up making it all work badly 3: some valves can be switched back and forth to open or closed systems by changing a plug on the valve,,but not all valves have this feature 4: you will need a closed center valve and don't buy it from your Deere dealer, Northern hydraulic is a good source,just make "sure" they know what you need and if it needs the closed center plug be sure it comes with it 5: most wood splitter systems are open systems.. 6: The people on here know more about this than most Deere dealers do...Now put this information to use and get some wood split...
 
Tim S, Thanks,
You have explained pretty clearly what seems to be the common thread I've been getting from folks that seem credible. While we're on the subject, what, if any, thread seal is used when hooking up these fittings? It seems I've heard not to use teflon tape. Any other tricks to this?
Guess I'll order up a new valve; thanks for the input. I might be asking for more before it's over.

Cliff
 
Tim S. Thanks. You've explained pretty clearly the same thread I've been getting on this from other credible-sounding folks. While we're on this, do you put any thread dope on these fittings when hooking things up? I heard not to use teflon tape. What else do I watch out for?
Might be asking you guys for more help before this is over. Thanks again.

Cliff
 
My buddy has a wood splitter that we share. He has a Kubota, which is open center. I have a JD 2755, which is closed center. It came with a open center spool in the valve. We bought a closed center spoot to use with mt John Deere. We have to change it out when we go back and forth. It takes about 15 minutes each time. The splitter works better with his open center tractor because the handle goes back to nuetral after the ram makes it to the top of tue stroke. Open center means the tractor hydraulic pump flows open until you blick it with the valve. A closed center is blocked off and holds pressure until you open the valve to let the oil flow. Each system has advantages and disadvantages.
 
(quoted from post at 18:43:36 12/13/17) OK - hopefully here's picture of what I'm wondering about

Ditto what Tim stated. You could utilize the hyd connections in your photo to attach a closed-center log splitter valve. Male fitting would be for pressure(in) hose & female would be for return(out) hose on CC splitter valve
 

The images as shown are pretty much how the loader and backhoe are connected on my 1640. When using our log splitter with it’s own closed center valve , we don’t use the SCV. The log splitter uses the same direct supply and return hose to the ported transmission filter as the back hoe does .
Can operate the loader, backhoe , log splitter or a hydraulic motor without ever starving the front pump.
Oil temp is also lower as there is flow to spare through the oil cooler .
Only thing the SCV does here is rotate the chute on the snow blower .
 
Sorry about the redundancy yesterday in my two messages that were in response to Tim; thought I lost the one so I created another. Should have waited for my IT expert to oversee me.
I'll tell you guys how it goes after I get my cc valve. Thanks again for all your input.

Cliff
 
My vote is for a PTO pump to run the splitter. Less headaches and the engine can run slower. I use it on any of my tractors with no concern over closed-center, open-center, low GPM, etc.

Is OSHA going to arrest me when they see this photo?
a250340.jpg
 
I see child endangering charges and possible inappropriate holding allegations...and for gosh sakes,,don't show that little guy how to work....
 
A closed center is blocked off and holds pressure until you open the valve to let the oil flow. Each system has advantages and disadvantages.

Well said.
Major disadvantage of closed center - fixed pressure like JD had is that the loads are always pushed at constant pressure from the pump. This means that it takes same energy to split hard wood than to move the splitter up and down, (very minimum pressure seen by the pump is steering priority valve).
On motors running at high flow and little pressure, the JD closed center is disastrous.

Major issue with open center is to not really be realistic with very hgh flow, and uncapacity to have more than one SCV with flow control.

The closed center - Variable pressure (called load sensing) system is the very best of both world and was an Allis Chalmers first (for tractors) on 7000 series tractors.
I would think that a JD 4020 pump can be converted to load sensing, but it would take brand new SCV valves or reworked SCV valves (with the LS signal lines) to do it. Maybe the aftermarket companies should think about it...
 
Throw the valve away and just plumb the hoses into the remotes the John Deere hydraulic system will run anything you want if you do it correctly
 

Working at arms distance under direct supervision and wearing safety equipment, looks good to me.
As a side note.......Fortunate for the boy got his looks from his Mother.
 

Splitter requires a closed centre valve, same way I run my wood splitter and backhoe. Lots of flow, lots of cooling capacity and no cavitating the the front pump.
 

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