Power Beyond. What is it?

[MDM]

My Kubota LA463 loader is Power Beyond equiped. What exactly is Power Beyond? What are its practical uses? I don't know much about hydraulics.

Thanks.

 

[YASH2520]

Simply - This provides pressure (power) past your normal hydraulic ciruit. This allows for running attachments that require their own pressure source. Examples would be a backhoe or even addition loader functions such as a grapple. The control for these attachments would be separate from your normal controls.

 

[MadReferee]

My Kubota LA463 loader is Power Beyond equiped. What exactly is Power Beyond? What are its practical uses? I don't know much about hydraulics.

Your Kubota tractor has an open center hydraulic system and the loader valve is configured to provide power beyond capabilities. A picture is worth a thousand words so take a look at this link. The open center with power beyond diagram is the third diagram from the top. It shows exactly how a standard Kubota with loader is plumbed.

Hydraulic circuits explained

 

[rbargeron]

My rig has a set of rear remote hydraulic connections for when the backhoe is mounted. One dealer called it "power beyond" but as near as I can tell it just has two alternate connections for the FEL exhaust line. Normally, the FEL exhaust connects back to the reservoir. But for "power beyond" it connects to a line going to the rear remote instead. The other rear connector leads back to the reservoir. The circuit is completed if another open-center valve is conected to the rear remotes. This setup accomodates the FEL, or the hoe, or both, or neither. Clear as mud, no? Take care, Dick B

 

[jmc]

Your Kubota tractor has an open center hydraulic system and the loader valve is configured to provide power beyond capabilities. A picture is worth a thousand words so take a look at this link. The open center with power beyond diagram is the third diagram from the top. It shows exactly how a standard Kubota with loader is plumbed.

Hydraulic circuits explained

In the 3rd picture, does their note "Drawback lines for spent work cylinder and pressure relief oil only" mean that all the unspent oil needs to be jacked up to relief pressure before it can return? Seems like a waste of energy.

John

 

[MadReferee]

In the 3rd picture, does their note "Drawback lines for spent work cylinder and pressure relief oil only" mean that all the unspent oil needs to be jacked up to relief pressure before it can return? Seems like a waste of energy.

No. The return to tank line is neutral pressure when exhausting flow from the work ports. That's why you don't want it exhausting into the pressure side. The return to tank line is also used for flow when the valve's pressure relief activates.

 

[jmc]

No. The return to tank line is neutral pressure when exhausting flow from the work ports. That's why you don't want it exhausting into the pressure side. The return to tank line is also used for flow when the valve's pressure relief activates.

So the "work ports" are the control valve ports and not the cylinder ports?

John

 

[MadReferee]

So the "work ports" are the control valve ports and not the cylinder ports?

The work ports of a spool are connected to the cylinder. The valve itself will have either 2 or 3 ports, pressure inlet, outlet, and return to tank. A valve will contain 1 or more spools.

 

[jmc]

The work ports of a spool are connected to the cylinder. The valve itself will have either 2 or 3 ports, pressure inlet, outlet, and return to tank. A valve will contain 1 or more spools.

Thanks, MadReferee. Another chapter for the book.

John

 

[dillo99]

Okay...so which of those pictures describes my LA 302 Loader that has a HUSCO 9210 Control Valve.

I want to add rear remotes and despite reading all I can here I am still kinda confused!

Thanks.

 

[rbargeron]

You don't need to do anything to your valve. Add another connector for the exhaust line from the valve and run your remote off that. Connect the other remote line to the reservoir. See post above. I can walk you through it by PM if you want.

 

[MadReferee]

Okay...so which of those pictures describes my LA 302 Loader that has a HUSCO 9210 Control Valve.

I want to add rear remotes and despite reading all I can here I am still kinda confused!

The same picture (third from the top).

I have described this procedure here dozens of times before, but I will do it one more time for those who are unable to use the search function.

Assuming you have the proper aux valve with power beyond capabilities, then:

Disconnect the loader's power beyond line from the tractor hydraulic block. It will probably be the connection that is most rearward (see your LA302 or tractor manual).

Using a short hose with a union fitting or a new longer hose hose, connect the hose you just disconnected to the inlet of your aux valve.

Connect the power beyond outlet of your aux valve to the now open connection on the tractor hydraulic block.

Connect the return to tank outlet of your aux valve to the transmission sump. To do this find where the loader valve's tank line connects to the transmission and connect both lines to the transmission sump using a tee fitting. Note that this is the only line that can be teed into another line.

Your aux valve for the remotes is now connected and you are ready to rock and roll.

 

[dillo99]

I have described this procedure here dozens of times before, but I will do it one more time for those who are unable to use the search function.

Thanks Mad (for posting again). Just so you know...I have used the search function and I have read everything you and others have written on this topic...I just don't have the hydraulic background to understand all of it. So when you start talking "tractor hydraulic block", "power beyond outlet", etc. it starts to get a little confusing to us hydraulic newbies. BUT - the good news is that I finally think I got it! So thank you!

and thanks rbargeron too.

 

[rbargeron]

you're welcome - I don't mean to horn in - Mad knows his stuff - but you said you wanted to add rear remotes, not necessarily have an aux valve connected all the time. That's why I suggested setting it up so, in the evnt your FEL was not on the tractor, your rear remotes could still be used if you wanted to.

 

[MadReferee]

When the LA302 loader is removed the loader valve stays with the tractor. The only way to add rear remotes is to add an aux valve or remove the loader and plumb the loader valve work ports to the rear of the tractor which is not a very viable option. By definition, a rear remote must be operated by a valve somewhere on the tractor. A power beyond connection for a backhoe does not need a valve and may be plumbed several different ways. It is not the same as a rear remote.

 

[rbargeron]

A power beyond connection for a backhoe does not need a valve and may be plumbed several different ways. It is not the same as a rear remote.

The issue is that terms like "power beyond" and "rear remotes" are not defined consistently by everyone in the tractor patch. The dealer said my tractor has power beyond and a set of rear remotes. But the FEL valve has no separate power outlet and the rear connections have no control valve. Take care, Dick B

 

[MadReferee]

The issue is that terms like "power beyond" and "rear remotes" are not defined consistently by everyone in the tractor patch. The dealer said my tractor has power beyond and a set of rear remotes. But the FEL valve has no separate power outlet and the rear connections have no control valve. Take care, Dick B

Maybe only not defined consistently by your dealer . When talking about today's CUTS the terms are quite clear to just about everybody, including the manufacturer's documentation.

If your "rear remotes" have no control levers then how do you control the cylinder(s) that are connected to them?

If the connectors have to be jumpered together when not in use and/or they require an external valve block then they are "power beyond" connections.

Count the number of hoses connected to your FEL valve. There should be 6 or 7. You should have 4 hoses that go to the loader cylinders and either 2 or 3 hoses that connect back to the tractor. If you have 3 hoses then your loader valve has power beyond. If you have 2 hoses then the valve does not have power beyond and the neutral pressure fluid from the work ports is dumped back into the circuit.

However, your tractor may have more than one pump for hydraulic implements. One to specifically control the loader and another to control the 3pt and any aux hydraulic equipment. I have no documentation on your older Kubota so I can't be sure what you have.

 

[fishpick]

"Power beyond" - that's like God, right? (sorry couldn't resist anymore - that was the first thought I had when I saw this post)

Mad, et.al. - thanks for this post... awesome info... as I was reading it - I said out loud "I get it now"!

 

[rbargeron]

I have no documentation on your older Kubota so I can't be sure what you have.

Well you could always take my word for it - and anyway I'm not asking - I can look at it. My "older" Kubota is a '95 and power beyond marketing hype was already in full bloom. The valve has the 7th port but it's blocked, not used, nada. They kept it simple by using more disconnects. Ok I'm done with this - we're down to wetting the shrubs.

 

[MadReferee]

Well you could always take my word for it - and anyway I'm not asking - I can look at it. My "older" Kubota is a '95 and power beyond marketing hype was already in full bloom. The valve has the 7th port but it's blocked, not used, nada. They kept it simple by using more disconnects. Ok I'm done with this - we're down to wetting the shrubs.

Well, if you want to take that attitude fine. It doesn't help the poster who asked the question. The original poster was asking about hydraulics on a tractor with todays design. It's not possible to give valid help when you are comparing something that is not an apples to apples comaprison.

YOUR 1995 tractor's design configuration is not the same as TODAY'S tractor's design configuration. It is obvious that the Kubota engineers have decided to go in a different direction with their more recent designs, maybe to make things easier for connecting additional hydraulic components.