This is part of another post in kubota forums (l39 lots of questions) but it has transitioned to more of hydraulics discussion so I thought I might get more response here. Anyway I would like to add hydraulics to the backhoe on a L39 for a thumb and possibly a hyd. PHD in the future. I'm not really looking to get the parts from Kubota do to price. From the posts in the other thread sounds like its pretty much the same as 3rd. function on a loader. I dont care if it is operated by foot or toggle on the BH joystick. someone already said I need a open center valve. Anyway here are my question's
1. I figured I need a valve like the one WR long sells which seems to be a hyvair valve but on the WR long website it says its not sized to run Hyd. motor When I looked at the Hyvair web site it looks like the valve WR long sells is either a D03 valve is rated at 24 gpm or the D05 is 40 gpm seems like that would handle the L39 flow of 11 gpm not positive on that since the WR long site dosnt get very specific on what valve they are selling. Am I missing something why couldnt these valves handle a motor?
2. I also checked surplus center offerings and found the eaton-victor valve here=
Surplus Center Item Detail
Thing is they have two with open centers one with work ports closed in neutral (says for operating D/A cylinders) and one with work ports open in neutral (says for operating Hyd. motor) since I want to do both does this mean if I buy the one with closed ports in neutral I would have to hold down the toggle switch to spin the PHD (Not a big deal to me since I would not be holding it down all day only intermittently) or is there a bigger problem I dont see?
3. The other problem with this valve is its only rated for 10.5 gpm does this mean it would have a problem with the 11 gpm from the L39 or does it mean 11 gpm into the valve and 10.5 gpm out of the valve. I know its only .5 gpm just want to make sure I'm not going to blow anything up.
4.Can someone explian the difference between open/closed centers. Do I need an open center so the hyd. fluid can flow through the valve and back to the tank?
1. I figured I need a valve like the one WR long sells which seems to be a hyvair valve but on the WR long website it says its not sized to run Hyd. motor When I looked at the Hyvair web site it looks like the valve WR long sells is either a D03 valve is rated at 24 gpm or the D05 is 40 gpm seems like that would handle the L39 flow of 11 gpm not positive on that since the WR long site dosnt get very specific on what valve they are selling. Am I missing something why couldnt these valves handle a motor?
2. I also checked surplus center offerings and found the eaton-victor valve here=
Surplus Center Item Detail
Thing is they have two with open centers one with work ports closed in neutral (says for operating D/A cylinders) and one with work ports open in neutral (says for operating Hyd. motor) since I want to do both does this mean if I buy the one with closed ports in neutral I would have to hold down the toggle switch to spin the PHD (Not a big deal to me since I would not be holding it down all day only intermittently) or is there a bigger problem I dont see?
3. The other problem with this valve is its only rated for 10.5 gpm does this mean it would have a problem with the 11 gpm from the L39 or does it mean 11 gpm into the valve and 10.5 gpm out of the valve. I know its only .5 gpm just want to make sure I'm not going to blow anything up.
4.Can someone explian the difference between open/closed centers. Do I need an open center so the hyd. fluid can flow through the valve and back to the tank?