Kubota M7040D hydraulic

bdsandefur · Mar 13, 2014

I am trying to operate a wood splitter on my Kubota M7040D. When I let go of the hyd lever on the splitter, the tractor hydraulics seem not to be happy. I was told by a farmer friend that I need to use one outlet to operate the splitter and return oil to the resevoir but not through the other outlet. Does anyone know where or how to accomplish this? This splitter works fine on my JD 4320, but not on my JD 4410 or my Kubota M7040D.

J_J · Mar 13, 2014

Maybe you have a closed center log splitter valve on the log splitter.

Tractor data says your JD 4320 is a closed center hyd system, so the splitter is probably set up for a closed center hyd system.

Open center hyd system need a path to tank at all times. You can not block the flow.

To check if it is a closed center log splitter valve, remove the OUT hose from the tank and place in the filler hole and start the engine and operate the log splitter.

When the valve lever goes back to neutral, no fluid will flow from the OUT port.

How to fix it? Purchase a $60 open center log splitter valve and replace your current valve.

JD 44410

Hydraulics:
Type: open center
Capacity: 6.3 gal [23.8 L] (gear)
6.8 gal [25.7 L] (hydro)
Pressure: 2500 psi [172.4 bar]
Valves: 5
Pump flow: 8.6 gpm [32.6 lpm]
Total flow: 13.9 gpm [52.6 lpm]
Steering flow: 5.3 gpm [20.1

JD 4320

Hydraulics:
Type: closed center
Capacity: 14 gal [53.0 L]
Valves: 1 to 3
Pump flow: 22 gpm [83.3 lpm]

Your Kubota is open center.

http://www.surpluscenter.com/Hydrau...M-LOG-SPLITTER-VALVE-W-AUTO-DETENT-9-7724.axd

Tx Jim · Mar 14, 2014

bdsandefur
There's also a JD 4320 CUT that's open center. Which 4320 do you have? If your 4320 is a rowcrop then I'll 2nd what J_J stated.
JD 4320 CUT
Type: open center
Capacity: 10.3 gal [39.0 L]
9.6 gal [36.3 L] (eHydro)
Pressure: 2500 psi [172.4 bar]
Pump flow: 12 gpm [45.4 lpm]
Total flow: 17.1 gpm [64.7 lpm]
Steering flow: 5.1 gpm [19.3 lpm]