Another remote valve thread..

[tatra805]

The grapple thread went a bit sideways but i would like your confirmation on my setup.

Attached the setup i want to install. Are things correct?

CYL 1 and 2 are the dumping cylinders of my trailer.
CYL 3 the grapple

RS stands for rychlo spojka what means quick-connect overhere. I used the drawing to get my order explained in Slovak


The extra non regulated output i want to have to attach eg a logsplitter or other device with its own valves.

Cylinders and valveblock are bought, hoses ordered. To make the complete setup i need 28 meters of hydraulic hose and about 24 fittings. awaiting the price offers as we speak.

I opted to mount the valves next to the FEL valveblock so all controls stay grouped. Although these tractors are a small place altogether i would hate to have to swing my arms all the time.

Had to skip on the float function. The valveblock costs about 150 USD (Slovak production) while a block with float (German import ) was.... tripple that!!

Pics might follow later as things get installed.


Edit: maybe the drawing (if correct) might help some other newbie to get the picture. It took me weeks of staring at my joystick and reading TBN to figure it out...

 

[kennyd]

Your drawing is correct provided that the two RS connections at the bottom connect to the machine properly-but you did not detail that.

 

[john_bud]

I am not with Kennyd on this one, maybe I just am missing something. It looks like you are dead heading the PB to the bottom RS quick connect. By that I mean the full pressure in the PB port is going to the quick connect all the time with no way to turn it off / on other than to stop the tractor. When the RS is not connected and flowing, it will be continuously popping the pressure relief valve (that you don't show) in the valve block leading to smoking hot fluid, pump and possible seal failure.

A better solution would be to have a control valve on the PB line before the bottom RS. An even better solution is to have a 3 spool valve that controls the fluid to the remote.

jb

 

[tatra805]

John Bud, reading your remark i see it also....

So something like this could work?

Can the extra valve (suposing it is OC) be a settable flow regulating valve?
Something as a ball valve which you can leave in any position (when nothing is connected it should be closed of course) eg to drive a hydraulic motor at a settable RPM ?? (whats the name of such a valve?)

Something like this?

http://www.surpluscenter.com/item.asp?UID=2009021007222165&item=9-4341&catname=hydraulic

Lots to learn...

 

[kennyd]

I am not with Kennyd on this one, maybe I just am missing something. It looks like you are dead heading the PB to the bottom RS quick connect. By that I mean the full pressure in the PB port is going to the quick connect all the time with no way to turn it off / on other than to stop the tractor. When the RS is not connected and flowing, it will be continuously popping the pressure relief valve (that you don't show) in the valve block leading to smoking hot fluid, pump and possible seal failure.

A better solution would be to have a control valve on the PB line before the bottom RS. An even better solution is to have a 3 spool valve that controls the fluid to the remote.

jb

That is why i wrote this:

provided that the two RS connections at the bottom connect to the machine properly-but you did not detail that.

I ASSumed it was connected back to the tractor properly at a manifold or something. The valve is not needed if the PB line feeds another valve (like the 3PH on most machines) and it's NOT disconnected while the machine is running.

Just like adding in a backhoe...

 

[john_bud]

That is why i wrote this:
I ASSumed it was connected back to the tractor properly at a manifold or something. The valve is not needed if the PB line feeds another valve (like the 3PH on most machines) and it's NOT disconnected while the machine is running.

Just like adding in a backhoe...

Right. But he didn't show a valve and it looked like he thought one wouldn't be needed. Could be wrong -- it has happened!--

Tatra -- The PB port has 100% full flow going thru it (except when the flow is diverted by the valve actuation, used then sent to the "return" port). So, no. The valve in the diagram you drew can't be a flow regulating valve as it would be getting 100% of the flow from the PB port. But, yes, the valve you linked should work as a control for a rear remote that is used to run a hydraulic motor. The pressure that valve can take is fairly low, but if that's ok then it should be good to go. If you are using the hydraulic flow for the 3ph, you will need a PB port on the LAST valve plumbed to the 3ph.


With everything, there are multiple ways of doing it sucessfully. If you want to dedicate a % of the flow to valve #1 and the rest to valve #2, you need to split the pump output flow BEFORE the valves into 2 flows. That would regulate the flow between the devices (loader and rear remote). I wouldn't want to do it that way as you typically want more flow for the loader and hydraulic motors.

The most elegant way would be to mount a 3, 4 or 5 spool valve in the middle of the tractor and control the loader with a cable joystick mounted up by the steering wheel. And the remotes by either cables controls or hard links. Then only one valve is needed.

But in all honesty, there are others here with more experience doing this than me!
jb

 

[AKfish]

Can the extra valve (suposing it is OC) be a settable flow regulating valve?
Something as a ball valve which you can leave in any position (when nothing is connected it should be closed of course) eg to drive a hydraulic motor at a settable RPM ?? (whats the name of such a valve?)

Burden Sales Surplus Center Item Detail

I'm certainly no expert in this arena... but the RS tripped a red light for me too! What are you planning upon doing with the PB junction at RS?

I'm not real clear about the 2-way valve as well. As diagrammed, the valve has 2 PB inlet ports (one routes to RS- blue line) and one PB outlet. I've never seen a valve body with 2, PB inlets.

Is the plan to use a variable-flow valve to operate a hydraulic motor? Many hyd motors are big GPM hogs. Seems like a 2nd, series mounted valve with PB circuit would be needed.

Lots to learn as well...

AKfish

 

[kennyd]

I think by "2-way" he means "2-spool"...

The ports on the valve not marked are IN and OUT.

 

[tatra805]

Thanks for the input, trying to follow...

John bud you write: "The PB port has 100% full flow going thru it (except when the flow is diverted by the valve actuation, used then sent to the "return" port)."

Is it my misconception that the PB port differs from the return port by the fact that it diverts the high pressure flow side and thus not interrupts the supply of all valves that are connected to it?

Otherwise its function would not differ from the return line? As in an OC system the flow continues goes from IN to OUT and is only interrupted when a spool is opened and requires flow while shutting off the return line?


KennyD,

The 3pt is positioned as in the drawing, which is actually last in line. That would make the flow valve not necessary if i follow your comments.

but i dont see how the RS would get any pressure as long as the 3pt is OC flowing.

So this one is better?

 

[kennyd]

OK, What are you trying to do with the RS fittings at the bottom of your drawing?

The first picture in your last reply is 100% correct except for that RS at the bottom going nowhere...