Design-your-own 3rd Function

[J_J]

aeblank ,

Have you decided on the type valve, solenoid or lever type?

If lever valve, you need a valve with PB and ports to match hoses/flow.

If 3rd function, you probably need about a 10 GAL solenoid valve and a DO3 subplate.

All DO3 ports are high pressure, and the valve will provide full flow.

What is the purpose of the valve?

You might consider this lever valve.

1 SPOOL 14 GPM PRINCE WVS11B5C1 DA VALVE

If you want solenoid valve, we can help you find one to suit your needs.

 

[aeblank]

I was really just looking for information (not installing anything now).
When/if the time does come, I feel as though I mostly understand the hydraulic system, as it applies to 3rd function valves.
I've just seen several mentions of people doing it themselves, and wondered what all was involved.
Didn't ever expect it to go to three pages, but thanks all for the info.

 

[J_J]

I really did think you were ready to install.

With all the data you have received, you should be able to plan, round up the parts, and do it yourself for much less than you thought.

If this valve is primarily for the grapple, my recommendation would be for the diverter valve, which would be located up front, and you still have feather, and a simple thumb switch for grapple operation.

You can get that valve for around $100 from Baileynet.com

 

[aeblank]

I could swear I gave that disclaimer in the beginning, but oh well.
Anyway, yeah, it makes much more sense now.
I'm iffy on the diverter, but I can see where it's a viable option. I only have so much coordination anyway (so I dunno if I could run 3 things at once).

 

[J_J]

Yep, you did say that you wanted a left handed operated lever valve.

We are here to inform you of the way most other people are operating their grapple.

It is your money, so spend it like you want, and we will still help you.

Besides, I think it is less money to install the diverter valve.

$100 plus two small hoses and some fittings.

Now, if that not a good deal.

You can do lift and curl or lift and grapple at the same time, but not three functions

 

[aeblank]

So this is an old thread, but it's mine, so I can revive it. =)

I have all the stuff to add a diverter to my tractor (L3940) as soon as I have an afternoon free. That's all in a separate thread.

Now for the reason for the revival, my dad's L3710. Since there is a grapple (mine) available for borrowing, my dad suddenly wants hydraulics too. I figured he would go with a diverter like mine, and life would be simple.

Looking at his hydraulics though, I think there is an easier way.

See attached picture of the valve/hose area. I should be able to insert an open center, single spool, lever style "cylinder" valve. Right?
Either the green arrow or the white arrow hose must be going back to tank. As such, I could move it to the new valve, and make a short hose from the old valve to supply the new valve.

All that sound reasonable?

I'd like to mount it where the other green (was supposed to be a different color) arrow points.

A valve like this seems to fit the bill, but I wish the lever came out of it from the end, instead of from the top.
1 SPOOL 12 GPM WALVOIL SD5 CONTROL VALVE

Any ideas? Is my thinking correct on the hydraulics?

 

[J_J]

Your loader valve should have PB adapter installed to add another valve and the grapple valve should have PB also.

So your flow path should be like this, pump to loader valve, to grapple valve, to hyd blk and then to the rear, maybe remote, or 3pt, to tank.

All return/tank lines go to tank.

 

[/pine]

...A valve like this seems to fit the bill, but I wish the lever came out of it from the end, instead of from the top...

The handle will thread in 90* from the shown position which makes it stick up...
I made my own extended handle that is easier to reach from the seat...

 

[aeblank]

I also found this valve, which looks decent, except for the handle position mentioned above.
1 SPOOL 20 GPM HYDAC RM230 HYD CONTROL VALVE


Is PB different than open center?
From everything JJ said, my original thought/plan sounds correct, but I'm thrown by the power beyond comments.

From this, it seems it's just a term for adding another circuit to the "pressure loop".
http://www.tractorbynet.com/forums/hydraulics/114504-what-power-beyond-spoole-valves.html

but then there's this (woa, spendy!):
1 SPOOL PRINCE AUTO CYCLE LOG SPLITTER VALVE W/PB

and this:
https://www.google.com/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=power beyond

So I'm lost yet again.

 

[J_J]

PB stands for power beyond and is used in open center hyd system to pass high pressure fluid to the next valve.

The tank line or return line can not handle the high pressure, so the PB adapter is used to safely pass the fluid downstream.

All open center valves should be in series and have PB except the last valve, and on most tractors, that is the 3pt.

The two lever auto valve you indicated is used to setup and do a complete cycle on the cyl/log. Once you set the levers, the cyl will extend fully and retract and then return to neutral.

 

[aeblank]

Thank you for the explanation. Despite my fluids class in college, I am certainly no hydraulics guy.

On Surplus Center, I don't find much looking for Power Beyond...
I don't know if these two are actually compatible, but does that mean that I add a "power beyond" fitting to "any" valve?


like this POWER BEYOND SLEEVE FOR PRINCE SV VALVE

added to my "original" valve: 1 SPOOL 12 GPM WALVOIL SD5 CONTROL VALVE

I mostly understand the theory. I'm not sure yet how to apply it though.

Or maybe this one is better???:
NorTrac Monoblock Hydraulic Control Valve — 12 GPM, 1 Spool | Control Valves| Northern Tool + Equipment

I "chatted" with northern tool and they say I need a conversion plug 49388 for power beyond, but it is the same plug they say in the "questions" section for a closed-center. So I'm unsure about that one........

 

[J_J]

Valves that have a PB port are usually plugged. The assumption is that the valve will be the last valve in the hyd system and all fluid will exit the tank port

In that case, the main flow is mixed with the tank/return flow and all fluid exits from the tank port to tank.

If you use the PB port, an adapter for that valve is installed to make the valve PB capability to feed the next valve..

When using PB adapter, the tank line must go to tank.

That same port is also used to make the valve a closed center b installing a closed center plug in the PB port.

 

[aeblank]

Emailed surplus center, and was recommended this valve
1 SPOOL 8 GPM PRINCE MB11B5C1 DA VALVE

Seems reasonable. I guess I just needed to read through all the descriptions in order to find a valve with power beyond that isn't a multi-spool automated beast (or email).

Regardless, I guess I have a better understanding of power beyond and I have a valve spec'd. Both of which I was looking for.

 

[TMGT]

I've had good luck with the the Prince wolverine valves in the past, just wanted to pass along another option on surplus center I was looking at the other day that could save a few bucks.
1 SPOOL 12 GPM WALVOIL SD5 CONTROL VALVE

just nee d to varify that it is PB capable (my application didn't need it so didn't look into it).

Edit. just found the info on the walvoil site, says the sd5 is convertible to PB.

 

[aeblank]

Should the 3rd function go "before" or "after" the loader valve? Occurred to me that it probably doesn't matter, hydraulically.

 

[J_J]

The 3rd function valve should go after the 3rd function because it probably does not have a relief valve.

 

[TMGT]

Should the 3rd function go "before" or "after" the loader valve? Occurred to me that it probably doesn't matter, hydraulically.

Which valve are you using? The Prince valve you have listed in your earlier post incorporated a relief and can be used before or after the loader valve as long as you configure it for power beyond.

It's more common to put it after the loader valve as most people want the loader functions to have priority.

 

[J_J]

He indicated a solenoid 3 rd function valve in his first post, and it has to go after the loader valve.

If it is a monoblock spool valve, it can to anywhere in the flow path if the PB adapter is used.

 

[TMGT]

I was under the impression the op had decided on a diverter valve setup on his personal tractor and this was in reference to his fathers L3710, which was leaning towards the mechanical lever valve he mentioned.

That's why I was asking which valve.

 

[aeblank]

I was under the impression the op had decided on a diverter valve setup on his personal tractor and this was in reference to his fathers L3710, which was leaning towards the mechanical lever valve he mentioned.

That's why I was asking which valve.

Yessir. It's been a winding thread, and it's my fault.
This is the valve, and it does have a relief.
1 SPOOL 8 GPM PRINCE MB11B5C1 DA VALVE

I can appreciate it being after the loader, for priority. If it makes plumbing way simpler, for example, it's a nice option (knowing the drawbacks) to have is all.

As an aside, I finally got my diverter hooked up and it works great. Much easier for me to wrap my head around. As is shown in this thread, I'm only now understanding "power beyond".