Kubota 3000DT: Adding remotes and filter

nealfris · Mar 25, 2013

Hi all. What a long winter here in New England! I am looking forward to my spring tractor project and would like to ask for advice from this highly knowledgeable group.
My tractor has a factory FEL. The power beyond (green tape) goes out back to supply my Woods backhoe. There is a block on the left side under the seat that appears to supply the FEL valve (orange tape) and a return hose from the BH. Additionally there is a hose going from the "out" on FEL valve to the back of the tractor between the TPH arms (grey tape). Is the hose with the gray tape dumping into the tank or is that for my TPH?

1) I am going to add a elec/hyd diverter to my FEL valve for a grapple. Which valve should I buy? Has anyone found a simple push button thumb switch I can mount on the joystick shaft? The $200. replacement knob seems like over kill. What would be your choice for bolt on grapple for a 60" bucket?

2) I would like to add 3 valves for rear remotes. Can I use the PB hose for the BH to power these valves and supply The BH with PB from new valves? I would like these new remotes to be as versatile as possible. Possible uses include; TNT, BH thumb, wood splitter, post hole digger, hydro motor for boom mower. What is the best set up ie... type of valves, and what brand to buy?

3) One thing that has me totally confused is the QD's for the attachments. All my hoses are 3/8" does that mean I need 3/8" QD's? I have been on here a long time and have seen tons of projects and there appears to be no rhyme or reason for the layout, male vs female. My loader valve has the male connectors and the hoses to the FEL have the females. My BH has 1 male 1 female. Is there a norm for how these fittings are arraigned?
On here everyone refers to the QD's as AG or bobcat (flat faced). When I look them up at suppliers there are too many to count. Which AG QD's do I purchase to match what everyone is using? I know on pneumatics for air guns etc. their are 4 types but 99% are using the D style.

4) My tractor only has a strainer for the hydro fluid. With all the work I am doing it makes sense to me to add a true hydro filter in the system. Were is the proper place to add the filter?

I will try to attach a few pictures of my setup:

J_J · Mar 25, 2013

This valve would work good for the grapple. It is a divider/selector valve.

Surplus Center - 12 VDC 13.2 GPM SAE 8 DOUBLE SELECTOR VALVE

Hydraulics:
Type: open center
Pressure: 2205 psi [152.0 bar]
Total flow: 6.9 gpm [26.1 lpm]

Here is a three spool monoblock valve with PB for the remote.

http://www.surpluscenter.com/item.asp?item=9-7863&catname=hydraulic

If you want float on some of the spools, then select the stacked valve with the options you need. Maybe detent.

Surplus Center

Since you have a BH pressure source, you can use that to plug into the new valve and the PB out of the new valve will go to the 3pt.

Are you using a jumper hose when you disconnect the BH?

I believe in general use, the male QD is the pressure or supply hose.

Do you have PB on the BH valve?

nealfris · Mar 25, 2013

Thanks JJ.
The selector valve;Is there other things that I must order at the same time ie. elec. connectors, first fittings, mounting bracket etc? Maybe that will get me closer to install before I size and count for the remainder of the order.
Regarding the 3 spool valve, What style would you recommend for each spool given my list of possible attachments?

Is my 3ph externally plumbed? Is that the hose with gray tape that goes in the back of the of tractor? Shown in picture 3
My backhoe hoses simply connect together when BH is removed.
I have not checked the backhoe valve for PB. I would like to remove BH easily so If I could avoid tapping PB there it would be preferable.

J_J · Mar 25, 2013

The stacked valve is going to cost more, but you can add options you want.

For TNT, you might want float far the side link, and a 3 position detent for a hyd motor on an attachment, or two floats, etc.

This is a sample setup.

Burden Surplus Center

Your PB is probably coming out of the hyd block, so the remote will connect to the hyd block line.

Does your BH have two or three hoses.

Check and see if the BH valve has a PB port.

Where does the OUT line of the BH go now.

If you have all of the components, you want to have a series connection for all the valves, so that if all valves are in neutral, fluid flows from pump to tank.

Your series path might look like this, if all the valves has PB.

Pump to hyd block, to FEL valve, to remote valve, to BH QD, or the PB from the remote valve goes to 3pt.

If your BH only has two hoses, then the OUT line of the BH should go to a tank line, and you will have no 3pt, and with the BH on, you don't need the 3pt.

As far as fittings, talk to the guy at Surplus and have them match fittings for the valve ,select ready made hoses at Surplus that will fit your valve.

You can also take your valve to your local hyd guy and have them make up the hoses to the length you need. Get an estimate first before you accept there estimate.

Your 3pt is probably plumbed through the hyd block.

nealfris · Mar 25, 2013

unfortunately the surplus link didn't work.
I'm guessing your layout was 1- DA cyl spring center 1-DA cyl 3 position detent 1- DA cyl w/detent float
Does that sound right?

The BH only has 2 hoses and I could not find power beyond on BH valve

The system appears to be configured as follows;
There is a brass colored block that is attached over the top of a block with lines going to power steering. The line from that block goes directly to the FEL in port. From the FEL power beyond port a hose goes to the backhoe. The return hose from the backhoe goes back to that brass colored block. A third hose comes out of the "out" port on FEL valve and goes into the back of the tractor between the lift arms for the 3ph. Is this last hose power for the 3ph?

J_J · Mar 25, 2013

The pressure line from the hyd block goes to a port under the seat.

The only problem I can see with the BH valve is the back pressure on the OUT port of the valve.

Most OUT ports will only take about 500 psi, and there in poses a risk when installed in series with a 3000 psi system.

Since the BH valve has been used this way for a while, the source for the remotes should come off the PB from the FEL valve.

I would just insert the new valve into the PB from the FEL and put a QD on the PB port, and plug in the BH.
The hyd block will feed the 3pt.

The OUT line from the FEL will go to the back probably in the side of the tractor.

Go to this site and enter your tractor model and select hyd, and enter your email, and in a couple of min, they will send you a PDF of your tractor hyd system.

Kubota Parts | Buy Online and Save

MtnViewRanch · Mar 26, 2013

I can get you a 12 GPM Bucher stackable valve, power beyond ready with mounting brackets. 2 valves with float function detent and the 3rd valve a motor spool detent, all for just $469. No thinking involved, this is the valve for you ready to install.

Std rear remotes on utility and farm tractors are suppose to be 1/2" AG style. For some reason JD uses 3/8" and 1/2". Kubota uses 1/4", 3/8" & 1/2". It almost seems like on the std L's and the B models they use whatever pleases their fancy on the day that they are installing them. :confused2:

Should be able to do the front diverter with a nice control handle, 3 sets of rear remotes as described and a complete top & tilt set for under $1800.

nealfris · Mar 26, 2013

Thanks JJ for that link. I ordered the service manual, but it hasn't arrived yet. After looking at the messicks pages I now see how it is laid out. Without a great knowledge of tractor hydraulics I assumed the pump was inside the rear case, not powered from the engine as it is.
Is it a big problem that the BH only has 2 hoses? The return line goes into that brass block where the FEL in powered from.
There is a hose from the "out" on the FEL that goes into the back of the rear case where messicks diagram shows a fill/vent plug. Is this the tank dump? Is that where I should tee in the "out" from the new valve. Additionally, Is that a good place to install a true filter set up?

J_J · Mar 26, 2013

I have not seen much data on the BH valves, but some of them have two hoses and others have three.

If the OUT port of the BH can support high pressure, then it should be alright.

It would appear that the OUT/return port of the BH valve is used to feed the hyd block adapter plate and from the hyd blk to the 3pt, and therefore will be subjected to high pressure.