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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

Re: By the way

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04-24-2012 19:16:36

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Chris common open center POWER BEYOND valves have three lines BESIDE THE WORK PORTS.. You will have one marked in, one marked out, and one marked PB or power beyond.. now here is the rub most people get the out and PB mixed up. Out is only a dump back to low presure or tank side. The pb is what will carry the power on to the backhoe valve, IN PORT.. You can buy a seperate relief valve if you need.

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04-24-2012 19:39:46

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 Re: By the way in reply to jm., 04-24-2012 19:16:36  
1. would that go before the loader valve? That hose is very big and has a fitting on one end that i dont think i can replace and some knuckle head saughtered the other end to stop it leaking. so im trying not to disturb it for now.

2. what if i removed the relief valve and pluged it on the loader? would it then work off the relief valve on the backhoe valve. Would this be combining 3 spools to 6 more waking it work like one 9 spool valve.

3. is there any other option i would love to make this work? thanks again!!

4. Also the plugs i mentioned on the loader valve you can blow air in one and it comes out all 3 even the dump. so i guess no matter wich one i hook to im still hooking to the dump. RIGHT??

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04-25-2012 13:05:42

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 Re: By the way in reply to chrisBarwick, 04-24-2012 19:39:46  
Chris, check your valve for markings JM mentioned. Don't plug any relief valves.
With open center valves you need to close the open center path to harness the hyd power.
The open center path goes to the return after the last spool in the valve bank.
To use power beyond the center flow needs to be seperated from the return untill it goes through the remote valve and then the remote valve's return also sent back to return. This gets a bit trickey to advise upon here not knowing your valve because you want to keep the flow to the remote valve seperated from the main valve's return to prevent pressure backing up to places in the main valve it shouldn't go. The only power beyong I have ever set up required a plug be installed inside the valve under the P B fitting and the remote valve return flow came back to another fitting in the main valves return. This is the best I can do without seeing your valve.
Later Bob

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