Additional Hydraulic SCV's and Power Beyond

[boatermark]

I don't have a clear understanding of Kubota's extra hydraulic control valve options and "power beyond". I am currently looking at the 4330/4360, 4240/4740 series and have been comparing these against JD's 4x20 series. From what I have read, having extra scv's and power beyond installed from the start is easier and often more cost effective.

What do I want? I want a third scv to run a 4n1/grapple off the loader (preferably a toggle switch off the loader control stick like WR Long's), a 4th and 5th scv off the rear to run top-n-tilt in the future, and power beyond for high hydraulic flow implements such as a 3-point hitch mounted splitter or back hoe. I am guessing the 4th and 5th scv's will require an electric diverter.

I've been reading the site for awhile, but haven't really seen a clear explanation on this topic. Any input would be great. Thanks!

 

[MadReferee]

First of all, Kubota does not use the term SCV. They use the commonly accepted hydraulic industry term "spool valve". Trying to compare the JD terminology with the what is currently used by most of the hydraulic (and tractor) industry is confusing to some and difficult to compare apples to apples.

Now, as to your questions. Assuming you get a loader you will have a single control valve with 2 spools and a joystick to control the 2 spools. This valve is configured for power beyond and connects to the hydraulic system via a hydraulic block on the tractor.

Kubota also offers up to 3 optional rear remotes which are nothing more than up to 3 stackable spools that connect directly to a pseudo valve block on the tractor. This is a propriatary setup and is nicely integrated into the tractor's operator station.

You can also get what some people call a power beyond setup to connect to a backhoe. This is a dealer installed and configured option and usually no two are done alike. In essence, this connection breaks the hydraulic circuit somewhere before the 3pt and offers a direct pressure connection to a backhoe or some other valve. Usually having this means no 3pt usage as the line is cut before the 3pt. As there are several ways to add this functionality, it's best to check with the installing dealer to find out how he does it. Some setups require hoses to be connected and disconnected under the tractor and maybe a loop back hose too.

Finally, on the new Grand L-40 series tractors you can get a factory third function valve to run front hydraulics. This is almost identical to the WR Long setup in that you have an electronic solenoid valve in series with the loader valve and a push putton to activate it. Kubota also offers a factory diverter that works off the loader work ports to do just about the same thing without the third function valve.

 

[Rich P]

Not trying to hijack your thread, but I'm currently looking between JD and Kubota too. Most likely a L4240 in near future.
Rear hydraulics are not nessary to me, but the 4 in 1 bucket would be nice. Does Kubota have a FEL and 4 in 1 for the 4240 (and prices?) because it is not listed in the pricing sheet. How would the factory diverter compare to a true third valve?

 

[MadReferee]

The Grand L-40 series has a 4-n-1 bucket as an option (order L2245). It requires the thrid function valve.

The diverter option allows the the loader valve to be used as 2 rear remotes. They are probably plumbed to the rear so that kind of leaves that option out for front hydraulics unless you want to run a hose.

The diverter option is for those too cheap to buy true rear remotes or those who only have occassional use for remotes.

 

[boatermark]

Thanks MadReferee for the input. I wish Kubota's web site explained all that better. The rear remotes are clear, but the third front option on the L40s and the power beyond isn't.

Any more info on the 4n1 for the L40s?

 

[MadReferee]

Any more info on the 4n1 for the L40s?

Nope. My dealer didn't have any either, including pricing. I was more interested in who was making it, Kubota or an outside supplier.

 

[zurakowg]

Re: Kubota L2245 4n1 bucket. Specs and other info at:
http://kubotatractorforum.com/Kubota/4in1_4n1_MultipurposeTractorBuckets.html

 

[Yankee Clipper]

Boatermark,

Here is the deal on the confusing terms on Grand L 40 series:

Whenever your tractor runs, the pump pushes fluid through the hydraullic circuit and to tank. Power beyond means you are grabbing the pressurized fluid on it's way to the tank downstream of the loader valve or other designed circuit and doing some useful work with it along the way.

An example of this would be the third circuit you want to operate your four in one bucket. The loader valve on the tractor has a PB (power beyond) that normally feed the three point hitch directly. When the third circuit is added, the fluid goes through the control vavle and then feeds the hitch. Only when you hit the thumb switch to open or close the bucket is there a momentary interupption of flow to the hitch.

Auxilairy valves are the ones behind the seat and you can have three circuits maximum on Grand L 40 tractors. If you run an electrohydrulic splitter valve, you can have 6 circuits but only three at a time.

SCV is self cancelling valve. This auxiliary valves on Grand L Kubota as only three position spring return to neutral type - they will go to neutral when the handle is released. Larger Kubota tractors have self cancelling auxiliary valves that you can set the pressure where it will unlatch and return to neutral. There also is a float detent valve for use on applications where the tool follows the ground contour. Again, neither SCV or FD is available on the Grand L tractors.

Finally, you can run a backhoe or splitter right off the Power Beyond port - the backhoe kit has a jumper hose to feed it and return flow to the tractor which would be where I cut in to get flow for my open center log splitter valve.

I would talk with the service guys at your dealership - they know this stuff as they do it all the time and the sales guy is only wanting to be sure he sells you the right stuff for the order.

Good luck!

 

[kennyd]

SCV is self cancelling valve. This auxiliary valves on Grand L Kubota as only three position spring return to neutral type - they will go to neutral when the handle is released. Larger Kubota tractors have self cancelling auxiliary valves that you can set the pressure where it will unlatch and return to neutral. There also is a float detent valve for use on applications where the tool follows the ground contour. Again, neither SCV or FD is available on the Grand L tractors.

FYI: SCV is John Deere language means "Selective Control Valve" Also know as a rear remote to everybody else.

 

[mark2610d]

I have a 3240cab and would love to see some pictures showing which line is the pb line. Also would be nice to see where and how the electric hydraulic valve is mounted.

I have all the individual parts to do a true 3rd function but sill have no clue which line to tap into.

Any pictures would be greatly appreciated.