5740HST/Relieving pressure off of 3rd function valve

[dstig1]

I'll make sure to give that I try, but I think it is one of the combinations I have tried already.

And yes, key on, engine off to have power to the 3rd function diverter in my case.

Let me know how the full moon helps. I'll try anything at this point....

 

[rjkobbeman]

I bought the expensive QD's (Pioneer) and am still having the problem. I called my friend at Kubota and they talked to the service folks in Ohio that said you have to have the engine off, key on, then hold each of the 3rd function switches down for AT LEAST 3 SECONDS. I was cycling them but I wasn't holding each one down for a long period of time. If we all experiment with this we'll see if that holds the relay open long enough to take the pressure off. Hope it works. We'll play with the FEL position also.
(I still like the idea of orienting toward polar north with the joystick:laughing Full moon might help also with the gravitational affect on the fluid

I installed my 3rd function myself and have played with it a bit. I can verify that there is power (assume 12 volts) going down to the valve. Actually, there are two circuits, one for each button. Pushing the buttons with the key on (engine off), you can hear the solenoids operating when you push the buttons. That action is opening up a valve. The pressure HAS to equalize. (I say this not hooking anything up yet!) Knowing how this is installed in series with the FEL valve, I am willing to bet putting the FEL in float position and pressing the buttons (key on, engine off again) WILL equalize up the system.

Most of the problems I hear about are hookup UP the attachment because of pressure built up in the implement. Some have recommended a hose with QDs on it without fluid in it... and connect that to the implement when not in use. The air in the line will absorb temperature changes and pressure variations in the implement.

 

[dstig1]

Float is on lift/lower circuit. I tapped into curl/dump for the grapple diverter. That seemed to be typical, so it was what I did. I doubt float will help, but I can give it a whirl.

I can't explain it, as it will clearly lose pressure when you do this with the grapple on, but somehow there is just enough to stop re-connecting later.

 

[rjkobbeman]

Float is on lift/lower circuit. I tapped into curl/dump for the grapple diverter. That seemed to be typical, so it was what I did. I doubt float will help, but I can give it a whirl.

I can't explain it, as it will clearly lose pressure when you do this with the grapple on, but somehow there is just enough to stop re-connecting later.

You're having problems DISCONNECTING or CONNECTING?

If the problem is with CONNECTING, I would say there is pressure in the implement. You are problably trying to relieve pressure in the wrong system.

 

[dstig1]

Problems connecting, and there is NO pressure in the implement. I've been through this a number of times and have no problem on the implement side. The unrelieved pressure is on the tractor side. Trust me. I have fully relieved pressure on the implement with no effect. Yes, I know the implement is usually the problem as it gets warm and the fluid expands in a closed system, but that is NOT what is going on here.

 

[rjkobbeman]

Problems connecting, and there is NO pressure in the implement. I've been through this a number of times and have no problem on the implement side. The unrelieved pressure is on the tractor side. Trust me. I have fully relieved pressure on the implement with no effect. Yes, I know the implement is usually the problem as it gets warm and the fluid expands in a closed system, but that is NOT what is going on here.

Hmmm, well... back to tractor off and key on I guess. I would go back to playing with the FEL while the buttons are being pressed.

Basically, tractor off, key on, ONE button pushed (keep it pressed) then move the FEL joystick in all directions slowly. Then do the same with the other button (press it -- keeping it pressed then move the joystick in all directions slowly). Basically, you are trying to prevent pressure in one circuit from backing up into another. If you open up all circuits at the same time, pressure should make its way back to the tank and relieve itself. The FEL and bucket should not move if all of the pressure is relived from it. If the boom is up (bucket off of the ground) or the curl/dump is no relieved, this step is pointless.

These valves (3rd function and FEL) are connected together. I'm sure one can affect the other. I will take a look at my valve and documentation tonight and re-think this through.

 

[dstig1]

Mine is not integrated from the factory, it is an add-on diverter valve. I push the button and the curl/dump motion now acts as grapple open/close while holding the button. Release button and back to curl/dump. I'll play with it a bit more this weekend, but I have tried a bunch of things already with no success.

 

[rjkobbeman]

Mine is not integrated from the factory, it is an add-on diverter valve. I push the button and the curl/dump motion now acts as grapple open/close while holding the button. Release button and back to curl/dump. I'll play with it a bit more this weekend, but I have tried a bunch of things already with no success.

Ahhhh, and the plot thickens.

I would say at a minimum, you will have to move the dump/curl while at the same time holding the button down to relieve the pressure. (Of course, key on, tractor off.)

 

[dstig1]

Umm yeeeeaaaah.... I'm well past that point here... I've been doing all those things, and more since day 1 when it wouldn't go back together...

About the only thing I haven't done is try oddball positions with the loader, but then I am releasing all pressure on all lines (in theory) so I can't even really try different positions, as it will just collapse when I pull pressure off. It seems like the diverter needs some pressure pushing on it to let the fluid move, and by compressing the fitting with the clamp, it pops in when you hit the valve.

 

[rjkobbeman]

Umm yeeeeaaaah.... I'm well past that point here... I've been doing all those things, and more since day 1 when it wouldn't go back together...

About the only thing I haven't done is try oddball positions with the loader, but then I am releasing all pressure on all lines (in theory) so I can't even really try different positions, as it will just collapse when I pull pressure off. It seems like the diverter needs some pressure pushing on it to let the fluid move, and by compressing the fitting with the clamp, it pops in when you hit the valve.

You said your 3rd function valve was not factory. Is it Kubota at all? I wonder if your button(s) are actually opening up your valve with the tractor off. Something is obviously not opening and holding pressure.