Kubota L35 Third Function Valve Install

[2506shooter]

Yep. The power beyond is hooked into the N port with the power beyond sleeve installed. The backhoe and FEL are working correctly.

 

[Michael In Tennessee]

Yes to all the above.
I took both work lines off of the grapple to make sure I had all air out of the lines and realized that when one side of the valve was actuated both lines were pressurized.

I just went and picked up a check valve and installed it in the return line off of the new valve and before the tee. The grapple functions now but only opens when the solenoid is bumped. It closes like normal.

I've called Summit and they're sending me a new valve to try. Maybe that's what's wrong. Please let me know if you have any other thoughts.

Is the valve wired correctly?

 

[2506shooter]

Yep, only one solenoid actuating at a time. And has the correct voltage.

I've also just removed the check valve and tried it again. It's back to pressurizing both work lines.

Could the relief valve be set too low and causing it somehow? It is supposed to be set at 2615 psi from the factory but I haven't confirmed it.

 

[Michael In Tennessee]

I'm thinking you have the valve plumbed backwards. Got a good link to the valve and maybe some better pictures?

In your first pic, that hose on top of the valve, where does it go?

 

[2506shooter]

I'm thinking you have the valve plumbed backwards. Got a good link to the valve and maybe some better pictures?

In your first pic, that hose on top of the valve, where does it go?

That is the return line. Goes to a Tee in the return line of the FEL.

This is the layout I have.

 

[ptsg]

I can't see anything obviously wrong... I'm actually wondering if they somehow sent you a valve with the wrong spool installed on it.

These valves can be setup with various types of spools that can mix all kinds of ports in various positions. Some will block both work ports in Neutral, others will have a port open to tank in neutral, and so on.

 

[LouNY]

Every thing looks good,
one thing you could try would to manually operate the valve ( I believe it has a manual override)
and see how it works.
It could possibly have the wrong spool in it or an o-ring sheared.
Maybe the replacement will work correctly for you.
Good luck

 

[Michael In Tennessee]

Thanks, I see no obvious error assuming you have a PB sleeve/plug installed. At this point I agree with others that the valve is defective.

 

[Leejohn]

Is the valve wired correctly?

I would double check this. I see three spades on each solenoid, if it was just off and on it have two spades.

 

[Michael In Tennessee]

I would double check this. I see three spades on each solenoid, if it was just off and on it have two spades.

After thinking about this, I don't think so. I think one is unused ground.

You only have 3 possible valve positions. None should put pressure on both ports. Even intermediate positions shouldn't.

But, here is a possibility...when off-center, one port has pressure, the other should be open to tank. If, for some reason, tank also has pressure, then you have a problem. Now, my 3rd function doesn't have PB and tank. Just an outlet, which goes to backhoe. Convert this valve to the same configuration just to check. Remove the PB sleeve and plug to port. Hook tank to backhoe or whatever is downstream. Check function.