Hydraulic question on a Kubota M 6800

[foreman Etexas]

I'm confused as to what the heck JJ's talking about also.

Seems like hes saying that if the 3point is still trying to lift load or trying to keep it in the up position,that your not also able to pump the needed fluid to the loader at same time. Does your 3point leak down when you park the tractor with load or will it hold it up,(say several hrs)?

 

[Willl]

Of course it leaks down when off, they all do.

But when running, linkages connected to hydraulic valves lift the 3pt to the point where it matches your lever/handle. Once matched, it automatically goes to "neutral".

At least all the ones I played with.

Are Kubota's different ?

 

[J_J]

What is it that you don't understand about the neutral position. Did you not read the data that I posted?

There are a lot of people that don't know that on some tractors, that with the 3pt lever in the raise position, that you may be causing the relief to activate, and that puts the 3pt relief pressure back through the hyd system.

Neutral position for the 3pt is where the lift arms are not going up or down. Maybe some of you call it something else, but that is what it is, neutral, meaning not doing any work.

Not moving up or down = neutral valve position

Put a hyd gage at the 3pt and see what the pressure is when the 3pt is in the fully raised position. Some 3pt valves will return to neutral automatically.

 

[Willl]

that with the 3pt lever in the raise position, that you may be causing the relief to activate, and that puts the 3pt relief pressure back through the hyd system.

Then their linkages are are out of adjustment and it would do the same without any load at all.

 

[Willl]

Did you not read the data that I posted?

What data ?

 

[J_J]

Seems like hes saying that if the 3point is still trying to lift load or trying to keep it in the up position,that your not also able to pump the needed fluid to the loader at same time. Does your 3point leak down when you park the tractor with load or will it hold it up,(say several hrs)?

In theory, with a perfect hyd 3pt system, it should hold up the attachment until you lower the unit.

Some 3pt levers will auto return to neutral, but they all have a neutral position.

 

[J_J]

What data ?

Post #7

 

[Willl]

Post #7

This was a quote from somewhere ?

Got a link ?

 

[foreman Etexas]

Of course it leaks down when off, they all do.

But when running, linkages connected to hydraulic valves lift the 3pt to the point where it matches your lever/handle. Once matched, it automatically goes to "neutral".

At least all the ones I played with.

Are Kubota's different ?

I can leave mine in shed all nite,with something on 3pt in the up position and it will still be up in the morning when I go back,or for days...............
Kubotas must be different!!!

 

[Willl]

but they all have a neutral position.

Not something that's selectable by the user.

Like I said, most all 3pts find there own neutral when it satisfies the lever location.