Adding Solenoids to Kubota M6040

lovedgor · Sep 24, 2013

I purchased this subplate Surplus Center - 3 STATION DO3 SERIES OC SUBPLATE and these valves Surplus Center - 12 VDC 10 GPM OC DA SOLENOID VALVE

Has anyone installed this set up on a Kubota M Series successfully?

I have supply coming from PB on loader valve, then feeding the 3pt from the subplate. I can not get flow to the work ports when activating the solenoids. When connecting return line to Tank, the solenoids give flow to work ports. Is there any other place to get the supply so the subplate will be the last in the circuit?

Would this selector valve be the answer? Surplus Center - SAE 12 15 GPM 12 VDC HYDRA FORCE SELECTOR VALVE

J_J · Sep 25, 2013

Go to Kubota Parts | Full Service online retailer fill in the data select hydraulics and with in a few min, they will send you a PDF of your tractor hyd.

With no loader attached, there is a U pipe on the two connectors, and the pump supply goes back to what I think is the aux valve.

With the loader installed, and the PB adapter in the loader valve, this line would now feed the aux valve.

So when you add a subplate, it is in series with this line, and everything should be in a series path.

Your relief valve that came with the tractor, is at the top right of the 3pt block, and should be set to around 2770 psi.

I don't think you need a relief valve in the subplate.

Since the loader valve is first in the series path, it is now the master relief and should be set to 2770 psi.

Since no one knows the manufacturer of the Kubota valve, you will probably have to get the PB adapter from a Kubota dealer.

Once you purchase and install the PB adapter, the subplate assembly should work.

Tx Jim · Sep 26, 2013

lovedgor
Here's a copy of the loader hyd schematics you referred to

lovedgor · Sep 26, 2013

After many PM's to J_J,(Thanks again J_J), calling various Kubota dealers, and talking to Techs at SC 5 times, today SC finally admitted that the subplate was not the one I ordered. They are sending the correct one. I kept telling them it had an extra port (which is for a relief, you are correct again J_J). I plugged the port, but it seems that without the relief installed, the fluid just kept flowing thru the subplate when the valve was opened.