LOG SPLITTER FOR MY JOHN DEERE 790

[bottletree]

I have a John Deere 790 with a front end loader and I bought a log splitter attachment for it. I am having problems with the hydraulics. There are four ports for the front end loader. I detached two hoses from the loader and used these for the splitter. The splitter does not seem to work all the time. If I move the loader handle and tie it off, sometimes the splitter will work, and other times it won't. Never have any problems with the hydraulics when my bucket is hooked up. Does anyone else have run into problems like this? Maybe my 790 will not work a splitter.

 

[beenthere]

:welcome: to TBN

A pair of the ports go to the loader cylinders and the other pair go to the bucket curl cylinders.
Which pair are you trying?
May depend on which pair you are using, and which direction you are tying off..

 

[bottletree]

Tried both pairs and different directions. There has to be a loop somehow in the tractor system and I can't figure it out. I called the log splitter manufacturer and all I got from them is an open center valve or a closed center valve is "deadheading" on the tractor

 

[Industrial Toys]

I used my 770 ages ago the same way. Bunjied down the loader boom port (I believe) . No problem. Just very slow (on my splitter) for my liking. Make sure it's not going into FLOAT!

If it was deadheading the tractor, it would stall. Or the relief valves would be screaming!

 

[bottletree]

I have tried bunjeing the lever for the bucket. I can get those relief valves screaming. That is one of the things worrying me. If they scream I have a feeling it is not doing my tractor any good. Assume you mean by going into float is where my lever is in a neutral position. Now just wondering if splitter is too much for my tractor. Hate to go back to using a maul.

 

[RoyJackson]

Does the splitter have it's own control? If so, you'll be better off adding a Power Beyond kit

 

[3Ts]

I have tried bunjeing the lever for the bucket. I can get those relief valves screaming. That is one of the things worrying me. If they scream I have a feeling it is not doing my tractor any good. Assume you mean by going into float is where my lever is in a neutral position. Now just wondering if splitter is too much for my tractor. Hate to go back to using a maul.

The neutral position is NOT the float position. Float is a detent position beyond the "normal" range of the lever, not all valves have a detent. If your relief valve is screaming, there is no fluid flow (or very little) in your hydraulic circuit, it is all being dumped back into the tank before any of your valves.

How about a picture of how you have it hooked up?

 

[bottletree]

Food for thought. Tried looking on line for one to price . Scarce as hen"s teeth.

 

[bottletree]

These are the pictures

 

[s219]

I don't think a loader valve is setup for unimpeded continuous flow like you need with a splitter. At least not in a consistent reliable way. Someone else may be more familiar with the hydraulic circuit on the 790 but I think you need to tap into the circuit downstream of the loader valve. The splitter needs positive pressure inflow and unimpeded outflow back to the reservoir.

 

[Industrial Toys]

My 770 is basically the same as your 790. If anything you have a couple more hp. Same engine and tractor.

No float is pushing joystick forward into a detent to allow the loader to just as the name implies, float. Neutral holds it in one position. Are you sure you are using the two correct ports?

Make sure splitter is open center.

Use the loader boom ports.

Use a bunjie, but don't pull it forward enough to go into float. I may have gone backwards with the joystick where there is no float and you would just need to reverse the hydraulic connections.

 

[bottletree]

I agree and think that is my problem. Don't think I can get a continuous flow. Thought I would check with people who are in the know. Tks

 

[Industrial Toys]

Well I had that tractor and didn't have any trouble at all. Like I said, I just didn't like the moderate flow.

 

[bottletree]

seems like as long as you are using either both of the lift or tilt ports I would be ok. I will try loosening on the bunjie a little

 

[Industrial Toys]

What if anything are you using the ports for? Loader? Most log splitters would be open center for sure. You should be able to identify which are the loader ports, put a jumper hose inbetween the two and operate the loader circuit without deadheading the tractor as the oil will just flow through the hose. That should work in the raise or lower position.

 

[bottletree]

What you are saying is I might have to use a port from the tilt side and one from the lift side? There are four ports and I figured you would use one of the two sets of ports (lift or tilt)?

 

[shooterdon]

IT makes a very good point. Even working perfectly, it will be slow.

I found it more efficient to use a gas splitter and keep the tractor available to move rounds and splits.

 

[Industrial Toys]

No, That can and has happend to me, when the decal wore off. That will deadhead the tractor. I can't honestly remember which circuit I used. It doesn't really matter as long as you use both from that circuit. Trying to remember where the bunjie cord went?

Make sure those little pinoneer connectors are inserted and locked all the way. Looking to see if I kept a copy of my manual but I don't see one. Maybe I could have told you exactly which ports to use.

 

[bottletree]

One of the pictures I posted show the ports being numbered. The owners manual tells which # is for which. I have the hoses in the right ports. After much thought and talking to smart folks like yall I just don't see how I will get a continous flow of oil through my splitter

 

[Industrial Toys]

When you bunjie the joystick, oil flows out one port, through your logsplitter valve (when in neutral) and back to the the other port and to tank. When you engage the splitter lever, that oil is stopped from merely flowing through the valve, and is diverted through your cylinder (to do work) and the other side of the cylinder sends oil back to tank via the splitter valve..

Sorry. I didn't see the pictures. Good pictures. Make sure your joystick isn't being pulled in two functions. That won't work. The picture almost suggests that possibility.