all around newbie needs help

[Kubota Greg]

In the attached picture, does any know what these two fitting are for? There is also a place where it looks like there is an option for another port, but it is not drilled out and tapped. The letters above it are BYD. Would they stand for Pressure Beyond? Does the fact that there is no opening there mean this valve is not a pressure beyond style valve?

This is a Johnson loader TC-10. Originally had it's own pump and reservoir in the right side upright next to the control valve. I now have it connected to the tractor hydraulics. It came off a Bolens tractor and I had to fabricate my own brackets to get it on my Kabota B7100 HST-D.

I'm also having an issue with the hydraulics moving very slow. Was thinking/hoping there's a built in pressure relief tha tmight be turned low?

Any insight you can give me into this will be appreciated. Thanks

also a few other pics.

Greg

 

[Kubota Greg]

Try this again with pics this time

 

[kennyd]

The BYD means Beyond, or Power Beyond, used to feed another valve. It appears though this valve does not have Power Beyond capabilities because of the way the port is not machined. No problem though...it should still work for you unless you want to add more valves.

The PRV (pressure relief valve) has nothing to do with speed, it only controls the max pressure the system can build up. You would need to check that with a gauge plumbed into on of the work ports. Flow, or GPM determines speed.

A drawing of how your valve is hooked up to your machine, as well as the specs of you pump (GPM and PSI) would be needed to help you further.

 

[Kubota Greg]

Thanks KennyD

The supply line comes off of the hydraulic block that my tractor has. It's on the right hand side of the engine. I drilled and tapped a 1/4" npt thread. The return line (low pressure) goes back to the transmission via a Tee in the fill plug.

I believe the way I have the set up done, The 3pt hitch and the loader are now sharing the same hydraulic supply in parallel rather than in series like a power beyond. So what I have done is turn the valve under my seat to turn on my aux. hydraulic supply, thus turning off the 3 pt hitch. I have nothing connected to the aux supply but a plug. My thinking is that turns off the flow of hydraulic fluid to the 3 pt hitch allowing it to all go to my loader?

Perhaps all of my assumptions are wrong. I'm self taught and learned from reading these forums. But it gets confusing at times. below is a pic of my hydraulic block.

 

[kennyd]

I am NOT familiar with your system, but if the loader hydraulics are indeed in parallel with the 3PH then that is you problem. ALL valves must be in series...this can be done without the PB setup.

OUT of the pump
IN to the FEL valve
OUT of the FEL valve
IN to the 3PH valve

 

[tommu56]

I think kennyd hit the nail on the head.

Tractor should be open center with a priority valve on the hyd system you plumbed it like system is closed center.

A quick test and don't do it for log hold the three point lever in the up position to arms top out and then try and raise the loader.

link to parts manual
http://kubotabooks.com/AutoIndex/index.php?dir=Tractor%20Parts%20Manuals/&AutoIndex=5de6df2fb737462e5922e4d85ddeb680

owners manua
http://www.kubotabooks.com/AutoInde...s/&AutoIndex=6bb168112c70081357f79a612406bcd9l

service manuals wern't on line but cd ones were around $15.00

tom

 

[GATC35]

I thinky Kenny hit the nail on the head! (On edit twice....lol. Sorry tommu) I would pull that cover plate off and see how it's constructed on the backside. If it's a hollow cavity on back you maybe able to get a chunk of steel and make a new one with the center solid and two drilled and tapped ports. The line you have tapped in the plate now would remain, the other port would have the line leaving the loader valve that would feed flow to the 3 pt. hitch.

 

[Kubota Greg]

Thanks for the help. The reason I did not plug the center of my hydraulic block and drill and tap a 2nd hole for the return is that everything I have read so far has told me that a valve that is not power beyond can be damaged if it is used that way. Is this not true?

This set up was done as a temporary measure so i could test my work of attaching my loader and rebuilding the cylinders. I plan to by a new control valve that is power beyond and run it in series so the PB line runs to the 3pt hitch and the return line runs back to the transmission at low pressure. Do I have this right?

I guess the thing to do now is simply go for the purchase of the new valve.

 

[kennyd]

Thanks for the help. The reason I did not plug the center of my hydraulic block and drill and tap a 2nd hole for the return is that everything I have read so far has told me that a valve that is not power beyond can be damaged if it is used that way. Is this not true?

Possible, but not likely. Non-PB equipped valves are put in series all the time...

This set up was done as a temporary measure so i could test my work of attaching my loader and rebuilding the cylinders. I plan to by a new control valve that is power beyond and run it in series so the PB line runs to the 3pt hitch and the return line runs back to the transmission at low pressure. Do I have this right?

Yes, that is correct.

 

[Kubota Greg]

Thank you