Any thoughts on this idea

[woodlandfarms]

Hey Bob. Two things about your mod.

First, why do you not have an on off control on the second valve. I thought on the grapple / hook unhook lines that both were pressurised.

Second, as we have been discussing rolover bars, what is the deal with yours? in the photos you have it has a big NAPA sticker.

Carl

 

[BobRip]

Hey Bob. Two things about your mod.

First, why do you not have an on off control on the second valve. I thought on the grapple / hook unhook lines that both were pressurised.

Second, as we have been discussing rolover bars, what is the deal with yours? in the photos you have it has a big NAPA sticker.

Carl

On the one valve, if you close off one end of a piston it will not move. Essentially it becomes pressurized on both sides or none. I don't know how the hydraulic guys would view this, but it has been working fine for 1.5 years.

The rollover bar has a Napa rubber hose on it. I used to put this on the hydraulic couplings to keep them cleaner. It is stored on the roller bar. It has a slit down the length to allow removal.

 

[J_J]

Essentially it becomes pressurized on both sides or none. I don't know how the hydraulic guys would view this, but it has been working fine for 1.5 years.

Bob, Using the above statement, explain how you hook up the grapple, and are you using both hoses? You have to have some force pushing the grapple down, and another force pulling the grapple up.

 

[J_J]

Carl, We would like to see a picture of your grapple. Did you buy it or build it?

 

[BobRip]

Essentially it becomes pressurized on both sides or none. I don't know how the hydraulic guys would view this, but it has been working fine for 1.5 years.

Bob, Using the above statement, explain how you hook up the grapple, and are you using both hoses? You have to have some force pushing the grapple down, and another force pulling the grapple up.

I have a shut off valve in one of the lines to the quick attach cylinder. Very simple. The cylinder will move a tiny amount with the valve closed and you push or pull the quick attach handle. When it does pressure builds up on the unpressurized side or never gets to the cylinder if the valve blocks the pressure. The main point is that a cylinder will not move if the pressure is the same on both side. If the outlet is closed the pressure builds on the outlet side with a little movement of the cylinder and no more movement. If the inlet is blocked then of course no pressure is sent to the cylinder. If this is not clear I will break it down more.

 

[woodlandfarms]

Carl, We would like to see a picture of your grapple. Did you buy it or build it?

Purchased from Lackender Fabrication. Also bought the bucket from them as well. I don't have any specific photos of it. Hope these explain.

Also, I have added spacers on the teeth, triangle spacers. I kept bending the teeth....

Pix of old guy is not me, its my FIL

 

[J_J]

Carl, Thanks, I had not seen the bucket and grapple before. Looking at the first picture, I think I can understand why you are breaking that swivel eye off the link rod. The geometry seems wrong. The lower leg on the rollover link has a mechanical advantage, and when the bucket is tilted up, that swivel eye becomes a weak point. especially when you push the bucket into a pile of dirt or whatever. Logically, if the link bar was hooked up higher on the bucket, you would have a better situation, Although I understand that the geometry to the Quick-Attach is fixed in place. I have the 3 pt hook up, and some of my attachments have a different placement for the lifting lugs. The closer the top lugs to the bottom lugs will give faster response, and the more separated, will give more force.

 

[BobRip]

I have a shut off valve in one of the lines to the quick attach cylinder. Very simple. The cylinder will move a tiny amount with the valve closed and you push or pull the quick attach handle. When it does pressure builds up on the unpressurized side or never gets to the cylinder if the valve blocks the pressure. The main point is that a cylinder will not move if the pressure is the same on both side. If the outlet is closed the pressure builds on the outlet side with a little movement of the cylinder and no more movement. If the inlet is blocked then of course no pressure is sent to the cylinder. If this is not clear I will break it down more.

I see I did not fully answer a question. For operating the attachments (buckets, minihoe, etc.) I do use both lines, so they work normally. By shutting off one of the lines to the quick attach cylinder, I keep it from moving when activating the attachment cylinder. If I forget to close that manual valve, both cylinders may activate depending on the mechanical load on each. If one reaches a stop then the other will definitely move. The beauty of this mod is that only one single valve is needed. If you lift the arm, you can actually reach the valve from the seat.