Grapple Hookup

[McGeesEquip]

This is a thread that I want to learn more about. Please keep us posted on the final project. I would like to see your pics when finished and I'm going to be trying to learn more about your valves of choice. What switch are your going to be using, and why? I'm trying to learn more about the valve you posted a link to northern. www.northmanfp.com/pdf/DCVG03.pdf

Do yall feel that pressuring the grapple valve from a PB loader port is going to supply enough pressure. Is it not justs waste oil, or returning oil that comes from most PB ports?

Thanks.

 

[wvpolekat]

It is whatever oil is not used for moving the loader circuits. So, it will be at full pressure. It feeds the 3PH now, so I have no reason to think it wouldn't be able to.

Waste oil goes out the Tank port directly back to the tank under low/lower pressure. If my understanding is correct, this would be the oil from the "other" side of the cylinder, so if you are raising it, the waste would be from the lower circuit, if you lower it, the waste would be from the raise circuit. I believe it would also be oil from the pressure relief when it, relieves.

The way I think of it is that high pressure oil is always flowing IN to the loader valve. If none of those circuits are in use, the high pressure oil has to go somewhere, still under high pressure. It does this via the PB port, so if none of the loader valves are in use, you would get full system pressure and flow out the PB port. If you use a loader valve, the available pressure and flow in the PB port reduces by whatever amount the loader is using. This is also why my flow control valve has to go on the work side of my solenoid, because I can't restrict the flow of the "idle" loop on the high pressure side.

Do I get a gold star for today Kenny?

 

[wvpolekat]

I do plan on doing a full write up of things. Going to the in-laws Sunday to get the welding work done, and will take pictures.

I chose that valve in particular because I wanted to control it with buttons. One button to open it, one to close it. I found that valve in someone else's thread, but I do not recall which one.

I just got 3 new memory cards for the camera, so I will snap some pictures of the mounting and such.

As of right now, I am waiting until the valve and grapple are mounted to order hoses, just to make sure I get them the correct length.

As of this moment, I have the grapple, a 43 3/8" piece of 6x4x3/8 angle iron for the top lip of the bucket, associated nuts/bolts and the valve assembly.

I have a handlebar mount ATV winch DPDT switch ordered, but haven't seen it yet. The idea is to mount it on the loader handle where it can be manipulated with a fingertip.

There will also be a "master" on/off toggle with one of those spiffy flip em up covers on it, so I can turn the grapple off completely.

 

[kennyd]

It is whatever oil is not used for moving the loader circuits. So, it will be at full pressure. It feeds the 3PH now, so I have no reason to think it wouldn't be able to.

Waste oil goes out the Tank port directly back to the tank under low/lower pressure. If my understanding is correct, this would be the oil from the "other" side of the cylinder, so if you are raising it, the waste would be from the lower circuit, if you lower it, the waste would be from the raise circuit. I believe it would also be oil from the pressure relief when it, relieves.

The way I think of it is that high pressure oil is always flowing IN to the loader valve. If none of those circuits are in use, the high pressure oil has to go somewhere, still under high pressure. It does this via the PB port, so if none of the loader valves are in use, you would get full system pressure and flow out the PB port. If you use a loader valve, the available pressure and flow in the PB port reduces by whatever amount the loader is using. This is also why my flow control valve has to go on the work side of my solenoid, because I can't restrict the flow of the "idle" loop on the high pressure side.

Do I get a gold star for today Kenny?

Yes you do! Here it is:

 

[kennyd]

This is a thread that I want to learn more about. Please keep us posted on the final project. I would like to see your pics when finished and I'm going to be trying to learn more about your valves of choice. What switch are your going to be using, and why? I'm trying to learn more about the valve you posted a link to northern. www.northmanfp.com/pdf/DCVG03.pdf

Do yall feel that pressuring the grapple valve from a PB loader port is going to supply enough pressure. Is it not justs waste oil, or returning oil that comes from most PB ports?

Thanks.

WV explained it very well. The PB port carry the full flow from the pump. It is the T (tank) or OUT port that carries the waste oil in a Power Beyond setup.

As for the valves...just do a search for these terms in the hydraulics forum and you will have HOURS of reading.

diverter
3rd function
grapple
4n1
solenoid

 

[J_J]

wvpolekat,

Just a small correction. The hyd fluid through the system in an open center hyd circuit is low pressure until it meets some resistance like a cyl, motor, etc. Then the system comes under pressure. but if you are not using any valves, the fluid is low pressure throughout the system. You can pressurize the complete circuit, IN port, PB port, by activating the last valve before tank, and then everything upstream now has high pressure.

 

[wvpolekat]

Update on the install here:
My Grapple Build/Install - TractorByNet.com

 

[wvpolekat]

Just realized something..... Will I need a relief valve or will the loader valve take care of that?

 

[kennyd]

Just realized something..... Will I need a relief valve or will the loader valve take care of that?

No extra PRV is needed

 

[Gordon Gould]

Ive been reading this thread with great interest as I would like to swithch my grapple over to run off of a new valve like wvpolekat's to free up a set of rear remotes for a hydraulic top link. Ive been trying to learn some basic hydraulic stuff and thought I was doing ok until wvpolekat put up his schematic diagram. Now i'm confused.
I thought someone would say he would have trouble because he was feeding
his pto hydraulics with the out port of his valve instead of a PB port. That
confuses me. If you can do that why would you ever need a PB port. I can
see how his grapple will work as long as he doesnt touch his lift arm control.
But what would happen if he had a heavy weight on the lift arms and
inadvertantly operated the grapple valve while he was raising the lift arms??
Someone please explain - maybe I misunderstood something further back
in this thread.
Thanks.