grapple mounted...next hydraulics

[stormpetrel]

It might be some extra stuff to buy but I would check the pressure of the 2nd hose... if it's low pressure return... your 3ph is getting power somewhere else.

Excellent advice!! Something that would not have occurred to me. I'll need to add an inline pressure gauge?

 

[teg]

Remember this diagram... which should / maybe / could be your valve...

The location of the return hose says it's low pressure return, IF this is the case... and your Pressure Beyond is the plugged hole. Then winston1's link above should work http://www.princehyd.com/Portals/0/p...D5000InstS.pdf BUT don't take my word... look into it more. I think also, you'll need to buy the circle "2" the power beyond plug.

 

[stormpetrel]

Remember this diagram... which should / maybe / could be your valve...

The location of the return hose says it's low pressure return, IF this is the case... and your Pressure Beyond is the plugged hole. Then winston1's link above should work http://www.princehyd.com/Portals/0/p...D5000InstS.pdf BUT don't take my word... look into it more.

That's my valve (but for the two levers)..........talking to the Koyker guy was sure a scare!!! I will check it out.

 

[winston1]

To further confuse you and me take a look at this post as another possibility. Thinking your tractor is similiar to this 2310. http://www.tractorbynet.com/forums/yanmar/110593-hydraulic-pressure-tap.html

 

[Roonabeck]

I will say that when I got my 1510 with a Koyker 80 loader, it was plumbed with a power beyond setup, which had the loader inserted in the high pressure line between the pump and the 3ph. Then there was this "other" hose that was going from the loader valve back to the transmission, through the filler cap. The open center, closed center, and power beyond diagrams (for Koyker 80, perhaps yours is on their site also) are at http://www.koykermfg.com/images/koyker-manuals/archived/80-31904.pdf page 23. I changed my configuration to an open center (removing the power beyond sleeve and adding a plug) years ago. That allowed me to get rid of the hose going into my filler cap. I assume you need to do the reverse, which according to how mine was set up would require adding another hose going to the tranny.

 

[winston1]

Stormpetrel, I thinking your loader is currently plumbed just like mine and many others on the yanmars. That is just like this Hoye drawing. I really don't understand why you couldn't go from the out of the shown valve to the in of your new valve and then from the out of your new valve to the 3 point control valve. Probably some reason this wouldn't work and I'm sure someone will tell us. Koyker loader install on a Yanmar

 

[Willl]

Personally, I'd send that valve back and get a diverter type.

Much easier install.

 

[Gary Sweat]

This may not help but here is what I have observed on my pressure gauge:

The 3pt generally peaks out at around 750 psi when I raise the bush hog (4' king kutter) and around 500 psi for the box blade.

The gauge will go to just under 800 psi when I run the 3pt to max and hold it there.

The loader fully loaded with dirt peaks out at 750 psi.

It may be the valves on Koyker can handle the back pressure and so no PB is needed for them. I may have gone to the hassle and expense of running a return line when I didn't need one

Since I planned on putting the PB in, I never checked to see what the maximum back pressure is on my valve. From what I have heard, some valves can take more back pressure than others.

 

[normde2001]

Maybe I just don't understand the problem, but I would just do it this way, no muss, no fuss. All open center valves, out to in, out to in, etc., line em up, each working independently of the other, as long as you only use one at a time.

 

[Roonabeck]

Maybe I just don't understand the problem, but I would just do it this way, no muss, no fuss. All open center valves, out to in, out to in, etc., line em up, each working independently of the other, as long as you only use one at a time.

Yes, open center is much simpler to me, easier to understand. Just connect everybody in series, and don't accidentally forget to make the connections necessary to prevent deadheading the pump before starting up the engine.

 

[stormpetrel]

Maybe I just don't understand the problem, but I would just do it this way, no muss, no fuss. All open center valves, out to in, out to in, etc., line em up, each working independently of the other, as long as you only use one at a time.

Makes sense......except: I already have a power source much closer than the hydraulic pump; the loader valve (which is open center). High pressure line from the loader valve (via power beyond sleeve) to the grapple valve, working lines from grapple valve to grapple cylinder, return line from grapple valve "Teed" into loader valve return line close to end.

I had ordered all the stuff, valve, hoses, fittings adapters...everything. And then found out it was all too big. I talked to a tech at Surplus center, told him all about the tractor's engine size, hydraulic pump gpm, loader size, etc. The valve he sold me was for up to 30 gpm application; ity was huge and heavy. The hoses I got were the same size as the ports, i.e. 3/4" and 3/8".....huge!!!!

So, I re-ordered (on the sage advice of JJ, who posts on the hydraulics board), got an 8gpm valve, 1/4" working hoses, and 1/2" supply and return hoses. They should get here tomorrow, and with any luck I'll be posting photos of the new grapple this coming week. Of course, I'll be amazed if I don't end up a fitting or two short....whatever!! Very few things go exactly as planned.

I must say, I never would have even tried this on my own. The help and advice I've gotten here has been very valuable. I've learned a ton, and now have a pretty good idea of what I'm doing. So.....thanks!!!!

 

[normde2001]

Sounds overly-complicated to me:confused2:, but, as I said, I guess I just don't understand.

 

[winston1]

We need some pictures of this installation when you are done.:thumbsup:

 

[stormpetrel]

Sounds overly-complicated to me:confused2:, but, as I said, I guess I just don't understand.

If you check out the thread on the hydraulics board you can see a Prince diagram showing the plumbing. It's really very simple; there's a line going OUT from the loader valve to the grapple valve, and then a return line from the grapple valve which is teed to the return line from the loader.

Any way you do it, you'd still have two lines going to the grapple cylinder from the valve that operates the grapple, and two more lines (high pressure & return) to and from the valve. There's no other way to do it where there'd be less plumbing, right?

 

[stormpetrel]

We need some pictures of this installation when you are done.:thumbsup:

I can't wait!!! Shouldn't take long, the biggest part of the job will be fabricating mounting brackets for valve and qd fittings.

On a more embarrassing note; I was cleaning up around the place yesterday. We just bought our house less than a year ago, it had been owned by an old lady whose husband had died a long time ago. Nothing has been done to the place (aside from the most necessary house maintenance) for maybe 20 years. There was an old freezer 3/4 buried in the ground, they had used it for starting plants. The empty grapple bracket was just too tempting NOT to use to lift that puppy. I simply held the chain up, put a bolt between the holes where the pin that holds the grapple goes, and hoisted away. Long story short, the top of the bucket bent!!!!! The koyker bucket isn't cheaply made. In fact, there's a sort of U channel that runs along the edge to strengthen it; I never would have guessed...........ah, well!
It was still fun pulling that thing outa there, maybe my three ton jack (used judiciously) will straighten her out!!!!

 

[winston1]

Sounds like something I would do.