Remote Hydraulics

[BlacknTan]

I'm in the process of collecting the parts to add remote hydraulics to my Kubota B-7800. I've decided to use a Cross 2 spool valve per the recommendation of a large dealer that posts here.

Let me say that the people at Cross Manufacturing are excellent to deal with. They're courteous and informative even to an unknwoledgable individual such as myself.

They also provided me with the names of distributors I can buy from. They provided me with Haverstick Brothers in PA. Another great company with patient and knowledgable people.

If you need hydraulic parts, these are a great pair of companies to deal with........

 

[accordionman]

SIR,
i am trying to do this to my tractor also. i am told i will
need a spool valve that is called an open center. this
allows the hydraulic fluid to circulate through the system,
until you activate the valve. is the the kind of information
you were given? i am trying to do a top, and tilt on my
tractor. i have ordered a cylinder from surplus center, but
they are out of stock, and it is on backorder. tapping into
the system is my greatest fear, and i hope i do it correctly.
let us know what kind of progress you are having.
good luck.
accordionman
wlbrown
wright city, mo.

 

[MadReferee]

i am told i will
need a spool valve that is called an open center. this
allows the hydraulic fluid to circulate through the system,
until you activate the valve. .

Yes, your tractor has an open center hydraulic system so you will need to have an open center valve with power beyond that will connect in series with the loader valve. You should purchase a valve that is sized for your hydraulic system's gpm flow. A little larger is ok but not too much larger. For example if your tractor's gpm is around 5 then you should be looking for a valve in the 5-10 gpm range. Pay close attention to the size and weight of the valve because as the gpm rating goes up so does the physical size and weight. The commonly found 25 gpm valves are real monsters.

 

[accordionman]

MAD,
i do not have the valve yet. i would like to get a 4 spool
valve, because i may want to add some other cylinders.
my gpm is about 6, so i would not need one with a high
capacity, and i am not concerned about speed of operation.
i just want the convenience, and not have to get off the
tractor, to make adjustments. your comments please.
accordionman
wlbrown
wright city, mo.

 

[MadReferee]

Based on your L3000 tractor and your requirement for 4 spools, your best, most flexible, and probably least expensive route is to purchase a Prince SV valve with 4 stackable spools. I used a 3 spool version on my B2710 with just a little over 6 gpm of implement flow. The 4 spool will be about 2" wider than mine.

You can configure the spools to meet your needs. Here is a link to the Surplus Center configurator for that Prince valve. The typical spool valve selection would be "Section B".
-

 

[jpm]

if you look in the mehindra section you'll find under a post called adding remotes pics showing my set up. As mad said don't get a valve thats to big, i made the mistake first time, it's to big,to heavy to expansive

 

[dfkrug]

I have used valves from both Prince and Cross for this application
and if you decide to go with Prince's stack valves, you might not
like how high they sit on your fender. Use the R2500 style low profile
valves then. I had a very good experience with my 2-spool Cross
valve when I need to buy the Power Beyond sleeve from Cross later.
Too bad Prince no longer sells direct to end users. They were
very helpful, too. You can get a 2-spool Prince low profile valve
with the options you want for about $100.

 

[accordionman]

HELLO TO ALL,
can somebody please explain the term "power beyond"
what it means, and why you have to have this. thanks.
accordionman
wlbrown
wright city, mo.

 

[MadReferee]

Simply put, power beyond refers to the configuration of the spool valve's outlet section. Nothing more, nothing less. People have used it to refer to other things but it is simply just the configuration of a valve's outlet section ports.

When the outlet section of a valve is configured for power beyond, the work port exhaust fluid is isolated from the normal flow fluid output, making 2 outlet ports. One outlet port is the exhaust or return to tank port that carries neutral pressure fluid from the cylinders back to the tank. The other port is the power beyond port that allows the fluid flow to power valves beyond this valve.

When the valve spools are in neutral, fluid flows thru the valve and exits at the power beyond port. When a spool is activated, neutral pressure fluid from the cylinders is sent to the tank port instead of being dumped back into the main flow.

A valve that is not configured for power beyond will dump the exhaust fluid back into the main flow (the pb and return to tank ports are the same) instead of returning it to the tank.

A valve that has power beyond can potentially allow valves after it to operate when it is activated. If the valve is not configured for power beyond then valves after it will not work properly when the valve is activated because the exhaust fluid from the first valve is neutral pressure.

 

[schmism]

clear as mud!

 

[SPIKER]

Mad said it not me

what he said is right abo9ut the power beyond, simply put if you put in a a valve without power beyond on you're tractor which has open center system, and you plumb the valve in so that it is the last item in the system you will be OK, BUT in most cases the last item in the system is the 3 pt lift. this will pose a problem if you plum in a non power beyond valve due to the fact that the Neutral (or open to tank connection on a non power beyond valve) will be pressurized when the last valve is put into a pressure situation. say lifting a heavy 3 pt item. this can often cause problems on the valve and or operation of the cylinders in that valves movement area.

as stated power beyond is a 3rd port for "pressurize-able fluid" to travel through. The return to tank lines are in a different hose and lets the valve operate normally when the down stream valve/3pt is used.

hope that made you as confused as I am now

Mark M

 

[shaley]

So will the 3rd function remote I just ordered work for my FEL if it does not have power beyond on the base? Do they make a DO3 base w/PB?

 

[MadReferee]

It will work just fine. The limitiation is that the 3pt may or may not work properly, or at all, when the 3rd function valve and the 3pt are activated simultaneously. There probably is a DO3 plate with PB but I am not familiar with it, however it's not necessary for a tractor application. Relax and enjoy the new addition to your tractor.

 

[72chevy4x4]

wow-there sure is a lot to know about hydraulics

Does 'spool' mean just one hydraulic valve? So, double spool is to levers-each with their own body and each can go forward or reverse?

I'm looking into adding remote hydraulics to the front of the FEL. Is there anyway to add on to the existing B7800 valve to accomplish the need? Does anyone have a source for bent tubing or is it feasible to bend your own tubing (then take it into a shop to have the fittings installed)?

When adding a remote to the front of the tractor, is it best to tap into the rear remote on the B7800 and run the lines forward?

 

[BTDT]

Where are you located? Nothing in your profile. Places that can make up hydraulic hoses can probably make and bend hard lines for you or tell you where you can get it done.

 

[72chevy4x4]

Where are you located?

I am in Delaware-there is a local shop that makes hoses but I never thought to ask if they bend tubing. The one time I used them to make a hydraulic hose, it seems they were very expensive though.

 

[MadReferee]

Does 'spool' mean just one hydraulic valve? So, double spool is to levers-each with their own body and each can go forward or reverse?

A valve can have one or more spools (functions). A standard double acting spool has 3 positions, center neutral, A and B. Your loader valve is a 2 spool valve.

I'm looking into adding remote hydraulics to the front of the FEL. Is there anyway to add on to the existing B7800 valve to accomplish the need? Does anyone have a source for bent tubing or is it feasible to bend your own tubing (then take it into a shop to have the fittings installed)?

There is no way to add on to the existing loader valve short of purchasing a new 3 spool valve and fabbing a joystick linkage. Most people install either a diverter off the bucket curl spool or a third function valve. There are plenty of posts on the hows and whys of these methods. Just search for WR Long or take a look at the dozens of posts on grpple installs.

When adding a remote to the front of the tractor, is it best to tap into the rear remote on the B7800 and run the lines forward?

It can be done that way or with an electric diverter or third function solenoid valve. Having a button on the joystick is more convenient than using lever mounted on the fender. Routing the hoses can get a bit messy but people have done it. Search TBN for the various grapple installs to get an idea of how other people have done it.

 

[SPYDERLK]

accordionman, make sure you get the type of open center valve termed "tandem center". These close off the work ports in neutral and will therefore hold position. The generic open center does not close off the work ports in neutral - all ports are instead dumped to the return line in neutral. These are good for controlling motors.
Larry

 

[3RRL]

I just went through this whole thing and MadReferee helped through it the whole way. I had the exact same questions that you guys do. Here are a couple threads where Mad tells m about the hydraulics.
These first 2 threads are the beginning and end of adding a bucket grapple and all the valving and hoses etc.

First Thread Hydraulic Questions

Second Thread Adding Grapples

This last thread shows how I added hydraulic side tilt cylinders and 3 rear remotes and another valve too.

Adding Hydraulic Side Links and Rear Remotes

If you have time, read through them because there is a ton of information that helped me get through it correctly. I was freaked out at first not having any idea what I was doing, but with the help I received here and from others, it all came out great.
Hope that helps some.