Tapping off Hydraulic line for thumb

[racerboy832]

Yea I will call the Backhoe people again tommorrow and see if they can fax me the PB kit info, maybe I can make heads or tails of it. Right now there is only about an inch of room between the frame and the end of the valve bodies. I wouldn't mind cutting part of the frame away to add another lever if I knew which one to order.

 

[racerboy832]

Here's a dumb ? If the Main pump line is plumbed into the Log splitter type valve then the return (out) line is plumbed into the In of the control block will I have the same power as I would if the log splitter valve was never there? I'll only be using the thumb to set it and not with the bucket at the same time.

 

[racerboy832]

I just spoke with the Kelly people. The PB kit is just the sleeve. I was told to tee off the main power line to the Log Splitter valve and then Tee into the return. If use them (thumb and backhoe) at the same time it will be slower. However, Since I was only planning on using one at the time it said it shouldn't affect anything. He said there isn't any room to add another lever. This sound ok?

 

[dfkrug]

If the Main pump line is plumbed into the Log splitter type valve then the return (out) line is plumbed into the In of the control block will I have the same power as I would if the log splitter valve was never there?

If you install a separate valve upstream of the existing valve stack, then
you must use a valve with PB, and connect IT (not the Out port) to the
In port of the existing stack valve. See my post #7 above. If the new
valve is not too small, it will not adversely effect flow or pressure to any
downstream valves. If your pump puts out say 8GM at max flow, I would
get a valve rated for at least that flow rate.

As for the Kelly folks telling you to Tee into the pressure line for a new
valve, that is not correct. Teeing in to the return-to-tank line for the
new valve's Out port is OK.

 

[racerboy832]

ok, so if I can get the plug out of the end (return side) I should be able to purchase the PB sleeve. From the Sleeve it will run into my new Valve then just return to the tank. Or I purchase a valve(lever) with a PB port. Main pressure line goes into new valve and then the PB port attaches to the pressure inside of the current 6 spool stack. Did I get this correct?


If I take option # one. What happens to the current return line that is threaded into the end of the stack? When they make these end stacks do the commonly use the same PB sleeve or are there a million different types. Since I don't know the make of the current stack I can only go by measurements.

 

[J_J]

I would use a wire brush and clean up the end plate. After cleaning, use a mirror and look and see if there is a port with the letters PBN or BYD. As I said before, that plug you see on the end plate could be another return port. If you have a PB port, unscrew the plug and install the PB sleeve. Then figure out how much metal you will have to remove to installt a hose in the PB outlet. While you were at Princess, you could have looked at another end plate and observed what all you have. Each valve has a return port, and should go to tank.

If they don.t know the make of the valve, how are they getting the parts? Do they stock all parts for your BH?

 

[racerboy832]

Hey JJ. I'm doing this from all over the net. There is no local dealer for any of this backhoe stuff. I just called Kelly Manufacturing direct and talked to one of the techs. I'm hoping I have a PB port. I asked if they had one for my Backhoe and he said they don't make my hoe anymore. The make a smaller one and a bigger one but not that one. He said the kit they now sell taps into the end. He wasn't sure what valves I have but the ones they sell are just the sleeve. They are suppose to send me a manual but the guy I talked to yesterday didn't sound too active and the lady I was sent to today never called back. I'll look for those marks tonight. I'm hoping it has a place for the PB sleeve.

 

[dfkrug]

Or I purchase a valve(lever) with a PB port. Main pressure line goes into new valve and then the PB port attaches to the pressure inside of the current 6 spool stack. Did I get this correct?

If "pressure inside" is the In port to the existing valve, yes.

Look. You have to buy a 1-spool valve anyway. You can pay a bit more
for one with PB. Why mess around trying to find if your existing 6-spool
valve stack can be adapted for a PB port? And, if adding PB requires
a different valve section, you may need to modify your hoe carcass for it
to fit. Not to mention taking it out and apart.

All these valves are different; there is no common PB sleeve or plug that
is likely to fit more than one valve brand.

 

[racerboy832]

I have a new log splitter valve, a pile of hose, 2 way cylinder and all the material to build the thumb except a longer pin. I don't mind spending a little to buy the correct valve with the PB just trying to use what I have. I appreciate all the advice.

 

[J_J]

I don't believe a log splitter valve has PB. Although they are the cheapest valve around, another valve with PB would work, as the first valve inline. Just match the valve to the same flow rate, and it also needs a relief valve. .With this valve they use the letter C for carry over/PB

8 GPM valve.

https://www.surpluscenter.com/item.asp?item=9-7861&catname=hydraulic

https://www.surpluscenter.com/Instruct/I9-7861.pdf

https://www.surpluscenter.com/item.asp?catname=hydraulic&item=9-7867-B