Adding a rear remote to my Kubota L3710, will this work?

gaboy1 · Nov 4, 2015

Folks,

It's my first post, but I have had several Kubota's and need a couple of confirmations before I go forward on adding a rear remote for my L3710.

First off, I have a 3Pt stump grinder attachment that I am going to be using. I don't want to rob the remote hydraulics from my FEL operation if possible. So here is what I plan on.

I have a 2 spool valve mounted to the top of the Grinder (accessible from the seat or the side). I am planning to add a "T" fitting to the two outlets from my hydraulic value under the floor pan that currently run to my FEL valve. The FEL will be be routed on the straight through portion of the Tee (if that matters), with the offset leg of the Tee being fitted with a QD connector. I would then run my supply and return hoses from the stump grinder control to those new ports created. I don't have plans of operating the FEL and stump grinder simulatneously, I understand they would suffer from reduced flow if I did this.

Will this work?
Are the Tees sufficient, or do they present any issues for pressure or failure?

I appreciate any help you guys can offer. If I am wrong, please give a little explanation why, I would like to figure out what I don't know about hydraulics in this project. Also, I will not be using the PB supply port, just the ports that wind up routing to the IN and OUT on my FEL control.

Thanks.

/pine · Nov 4, 2015

gaboy1 said:
Folks,

It's my first post, but I have had several Kubota's and need a couple of confirmations before I go forward on adding a rear remote for my L3710.

First off, I have a 3Pt stump grinder attachment that I am going to be using. I don't want to rob the remote hydraulics from my FEL operation if possible. So here is what I plan on.

I have a 2 spool valve mounted to the top of the Grinder (accessible from the seat or the side). I am planning to add a "T" fitting to the two outlets from my hydraulic value under the floor pan that currently run to my FEL valve. The FEL will be be routed on the straight through portion of the Tee (if that matters), with the offset leg of the Tee being fitted with a QD connector. I would then run my supply and return hoses from the stump grinder control to those new ports created. I don't have plans of operating the FEL and stump grinder simulatneously, I understand they would suffer from reduced flow if I did this.

Will this work?
Are the Tees sufficient, or do they present any issues for pressure or failure?

I appreciate any help you guys can offer. If I am wrong, please give a little explanation why, I would like to figure out what I don't know about hydraulics in this project. Also, I will not be using the PB supply port, just the ports that wind up routing to the IN and OUT on my FEL control.

Thanks.

Greetings and welcome from N.E. GA...
On an open center system you can't "T" pressure lines...(OK for the returns) but the pressure will seek the path of least resistance..
Does your loader valve have a PB port?
[Edit]
Re-read the OP and see where the FEL will not be used at the same time so I would use some QD's and not have to "T" anything..

gaboy1 · Nov 4, 2015

/pine said:
Greetings and welcome from N.E. GA...
On an open center system you can't "T" pressure lines...(OK for the returns) but the pressure will seek the path of least resistance..
Does your loader valve have a PB port?

Hmm, Ok, thanks for the quick response.

So I can't T off the pressurized line? I do have a PB port on the loader.

gaboy1 · Nov 4, 2015

gaboy1 said:
Hmm, Ok, thanks for the quick response.

So I can't T off the pressurized line? I do have a PB port on the loader.

Also, I understand the path of least resistance, but if the control valve I have for the stump grinder is not in an open position (not engaged to supply pressure to anything) wouldn't it be closed, just as if it that line was plugged?

Sorry for the question, not trying to doubt you, just trying to understand how that part works.

Thanks.

/pine · Nov 4, 2015

If you "T" the pressure line that has two different (open center) valves...the fluid will always divert to the valve with no demand...and return to the tank...

gaboy1 · Nov 4, 2015

/pine said:
Greetings and welcome from N.E. GA...
On an open center system you can't "T" pressure lines...(OK for the returns) but the pressure will seek the path of least resistance..
Does your loader valve have a PB port?
[Edit]
Re-read the OP and see where the FEL will not be used at the same time so I would use some QD's and not have to "T" anything..

Ok, I think I just figured it out. I looked up "open system hydraulics"...

Since the valve I have is Open System type, it doesn't actually block the flow to when not engaged, it just relieves it directly to the return line. Therefore, that would always be the path of least resistance... right?

gaboy1 · Nov 4, 2015

Thanks Pine, I get that now. I was wondering on all of these other post why it looked so complicated

Ok, If I don't want to completely unhook my FEL hoses (and just hook my supply to that), were you eluding to the possibility of using my PB line or port?

/pine · Nov 4, 2015

The path of least resistance would always be through a second valve that was in "parallel" (T'd in an open center system)...
You can get pressure to your attachment via the PB port on the FEL valve and there is no problem "T"ing" the return...just need long hoses...

On another note...
There may be a hydraulic adapter block available that connects to the PB port of the 3PH)/pump that will give you both pressure and return ports...this is typically used to add rear remotes...

/pine · Nov 4, 2015

...Ok, If I don't want to completely unhook my FEL hoses (and just hook my supply to that), were you eluding to the possibility of using my PB line or port? ...

If you use the working ports on the FEL valve...no need to use the PB port...
[edit]

You should only need to disconnect one circuit (dump/curl) from the FEL valve...

gaboy1 · Nov 4, 2015

Thanks again for the response, I think we have it now. So if I am understanding it right, I can rob the PB port (and function) from my FEL control for powering my rear remote valve. And I would still have up/down/curl/dump FEL functions, just not as fast for some?

Where would be the best place to intersect the PB line? Should I just install a QD underneath and unplug my FEL line / plug in my Grinder line there?