OP
stormpetrel
Gold Member
Excellent advice!! Something that would not have occurred to me. I'll need to add an inline pressure gauge?
grapple mounted...next hydraulics
- Thread starter stormpetrel
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Excellent advice!! Something that would not have occurred to me. I'll need to add an inline pressure gauge?
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.
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.
OP
stormpetrel
Gold Member
That's my valve (but for the two levers)..........talking to the Koyker guy was sure a scare!!! I will check it out.
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
Silver Member
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.
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
Elite Member
Personally, I'd send that valve back and get a diverter type.
Much easier install.
Much easier install.
Gary Sweat
Platinum Member
- Joined
- May 9, 2010
- Messages
- 519
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.
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
Elite Member
- Joined
- Mar 10, 2002
- Messages
- 4,163
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
Silver Member
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.