No Hyd. float position

[farmered1]

I have a New Holland TN 65 and the rear hyd. does not have a float position. I just bought a Kuhn SR 108 V - rake that the book says must be used with the hyd. in float position. Dealer says it will work with out float but I don't know ? If it won't what could I change to make this set-up work ?

 

[/pine]

my understanding is most 3 pt hitches are normally in a float position as few have down pressure capabilities...tractors with draft control would be one exception...I could be wrong about this but I think the basic concept has recently been discussed here possibly in a thread about "draft control"

 

[farmered1]

I am not talking about the 3-point lift but the hyd. remote outlets.

 

[kennyd]

You would need another valve spool that has a built-in float detent...I don't see another way around it...

 

[jinman]

I have a New Holland TN 65 and the rear hyd. does not have a float position. I just bought a Kuhn SR 108 V - rake that the book says must be used with the hyd. in float position. Dealer says it will work with out float but I don't know ? If it won't what could I change to make this set-up work ?

Let's think this through. You have a rake that requires a remote hydraulic that must float. Float is the same as the inlet and outlet being tied together. If you put a valve between the two remote connections and open it only with the rake, then you are providing float. If you want to build an adapter with a female quick-connect on each end and attach your two remote hoses from the rake, then you will have float. I have no idea how this could be useful or what function you would be doing with the rake, but this will provide the float function. Now, if what you need is the ability to switch from normal operation back and forth to float, then the valve between remote connections is the only way to go.

If you need to be able to raise and lower something on wheels and then let it "float" during operation, I'd suggest just putting a valve inline that you could throw and allow float. When you need normal operation, close the valve and use your remote as normal. That's how I'd do it since that's a lot cheaper than buying a floatable remote when you don't have one installed.

 

[kennyd]

Let's think this through. You have a rake that requires a remote hydraulic that must float. Float is the same as the inlet and outlet being tied together. If you put a valve between the two remote connections and open it only with the rake, then you are providing float. If you want to build an adapter with a female quick-connect on each end and attach your two remote hoses from the rake, then you will have float. I have no idea how this could be useful or what function you would be doing with the rake, but this will provide the float function. Now, if what you need is the ability to switch from normal operation back and forth to float, then the valve between remote connections is the only way to go.

If you need to be able to raise and lower something on wheels and then let it "float" during operation, I'd suggest just putting a valve inline that you could throw and allow float. When you need normal operation, close the valve and use your remote as normal. That's how I'd do it since that's a lot cheaper than buying a floatable remote when you don't have one installed.

The only problem with that suggestion is that there is not the same amount of fluid on each side of the piston, so the pistons can only move so far before stopping...some float could be achieved, but not full travel of the piston. Possibly there would enough...but I am not sure what the cylinders do on this implement and why they "MUST" float.

 

[jinman]

The only problem with that suggestion is that there is not the same amount of fluid on each side of the piston, so the pistons can only move so far before stopping...some float could be achieved, but not full travel of the piston. Possibly there would enough...but I am not sure what the cylinders do on this implement and why they "MUST" float.

Yep, only 85-90% float, but that's a whole lot more than 0%. I hope farmered1 will let us know what the float function is needed for and how it would be used. That would help both of us better evaluate his problem. I agree with him that if the manufacturer says it needs float, then providing a way to float is important. It's important enough that I would find a workaround or just pony up the bucks for the new remote that has float.

 

[farmered1]

I have been raking hay for a couple of days and just getting time to look at computer. The way this rake works ,it has hyd. cylinders on each side to let the arms with rake wheels down to the ground. It has large coil spring on each side to control ground pressure of wheels to ground. The purpose of the float requirement is in case you are raking very uneven ground such as the center of rake is in a low spot and both sides are sloped up kind of like a ditch. I just got done raking 50+ acres of rolling ,flat and hilly ground like we have here in middle TN. and it seem to work great with out having the hyd. float mode. Thanks for the suggestions .

 

[jinman]

Wow! Two days of raking? How many acres?

That's kinda what I expected. Just from hose flex (ballooning) you probably have some small amount of float. If it continues to work for you, then I would not worry about it. If it becomes a problem, then you could add the bypass valve between hydraulic lines so you can have float.

 

[J_J]

I don't think you would even need the valve. Just remove the pins on one end of both cylinder. The springs probably give good enough ground contact.