Remote valve types for L3901

[J329]

I’m finalizing options for a L3902 and am confused on what valve styles I need for top and tilt. The two dealers I went to both said float detent for one, and self canceling detent for the other, but they also sounded unsure. I’m going to use it for operating a box blade.

Please dumb down the hydraulics for me. If I wanted to set the side to side tilt and front to back tilt and have them stay locked at those angles for x amount of time while operating and not have to touch the levers, would the above valve styles accomplish that?

How about in the future if I want to run a hydraulic wood splitter?

Thanks in advanced

 

[TheOldHokie]

I’m finalizing options for a L3902 and am confused on what valve styles I need for top and tilt. The two dealers I went to both said float detent for one, and self canceling detent for the other, but they also sounded unsure. I’m going to use it for operating a box blade.

Please dumb down the hydraulics for me. If I wanted to set the side to side tilt and front to back tilt and have them stay locked at those angles for x amount of time while operating and not have to touch the levers, would the above valve styles accomplish that?

How about in the future if I want to run a hydraulic wood splitter?

Thanks in advanced

For TnT spring center valves with lock valves on both cylinders.

Three point wood splitters dont need a remote valve.

Dan

 

[midironman]

I have the L3302. I installed the Land pride 3rd function and in the process of installing a three spool monoblock valve from Summit for rear remotes. I selected the two spring center for TnT and one locking for hydraulic motor control. You don't need a float detent because the L02 series has the float feature on the FL and 3-pt. I find it works well. Your other option is self-canceling, like for a splitter, but others on this forum don't recommend using a splitter.

 

[TheOldHokie]

I have the L3302. I installed the Land pride 3rd function and in the process of installing a three spool monoblock valve from Summit for rear remotes. I selected the two spring center for TnT and one locking for hydraulic motor control. You don't need a float detent because the L02 series has the float feature on the FL and 3-pt. I find it works well. Your other option is self-canceling, like for a splitter, but others on this forum don't recommend using a splitter.

One more time - you dont need a remote valve to run a log splitter. You plumb it exactly like a backhoe.

Dan

 

[Russell King]

To expand on what was stated above.

The lock valve should be a double pilot operated check valve (DPOCV) similar to this

https://ph.parker.com/us/en/product/pilot-piston-style-dual-pilot-operated-check-valves/cdph103p20-8t

These are normally cylinder mount but can be mounted to the tractor end of the lines.

For the valve selection the float detent is fine on one or both valves, since it can be selected or not at the valve lever (push it further than normal). Most people get it on one valve only to let the tilt to float. But you can’t use float with the DPOCV since the cylinder is “locked”.

For the future wood splitter use, I expect you mean to hook the splitter to the rear remote but that doesn’t work well since the normal two valves don’t have a continuous flow out of the outlet. The normal splitter has its own control valve that controls a continuous flow from a pump. Since the spitter needs continuous flow it can be connected to the tractor’s continuous flow path by disconnecting the power in (P) hose to the FEL, connecting that to the splitter and connecting the splitter return hose to the P port on the FEL valve. Or using the backhoe circuit connection points. There are other arrangements that work but normally a rear valve is not used although a third valve that would be an on/off valve probably could be installed at the rear. The self canceling type would be problematic since it would turn off every time the splitter reached pressure. It would have to be used instead of a valve on the splitter (as I understand its purpose).

 

[midironman]

Thank you gents, makes sense.

 

[old and tired]

....

 

[midironman]

I mainly want to add that the dealers you talked to, don't know crap. (Were they just salesmen?) You can not use Float feature (or the self canceling detent) with the double pilot operated check valve (which you really do want!!).

The check valve keeps the Top and Side link fixed / locked into place until it gets "lots" of pressure. I was told above 900 psi but also heard over 300 psi - I don't know for sure what it takes but it keeps the hydraulic pressure where you leave it.

The valves only need to be the simple: DA (double acting) spring to center valves and your top and side link need; double pilot operated check valve (DPOCV) attached to them like the photo below.

It's been mentioned that Kubota valves are not the greatest because they leak down but DPOCV will fix that, make sure you get those... let us know what those dealers say about them!!

I will be adding theses to my setup as well. Thank you

 

[TheOldHokie]

I mainly want to add that the dealers you talked to, don't know crap. (Were they just salesmen?) You can not use Float feature (or the self canceling detent) with the double pilot operated check valve (which you really do want!!).

The check valve keeps the Top and Side link fixed / locked into place until it gets "lots" of pressure. I was told above 900 psi but also heard over 300 psi - I don't know for sure what it takes but it keeps the hydraulic pressure where you leave it.

The valves only need to be the simple: DA (double acting) spring to center valves and your top and side link need; double pilot operated check valve (DPOCV) attached to them like the photo below.

It's been mentioned that Kubota valves are not the greatest because they leak down but DPOCV will fix that, make sure you get those... let us know what those dealers say about them!!

Kubota and Land Pride TnT cylinders do not come with lock valves so that pretty much eliminates them.

The dealers quoted the most expensive vakve configuration offered.

Dan

 

[MtnViewRanch]

If you are going with factory Kubota valves, then there is no need to get anything other than spring return to center valves. The Kubota rear remote valves are known to have excessive internal leakage, so you will need to have double pilot-operated check valves on the top & tilt cylinders to hold them in place.

If you go with a 3rd party supplier, the valves usually end up mounted either on the fender or with a mount clamped on the roll bar. It is very common for 3rd party valve sets to be electric-operated valves, so not the optimum thing for fine tuning T&T adjustments.

If you find that you want manually controlled valves similar to what is pictured, you can get both valves with the float feature for the T&T use as well as a 3rd detent valve to be used as a supply type valve to connect your log splitter to and not have to have a separate power beyond connection.

 

[J329]

Thanks guys. So spring to center valves with double pilot check valves added to both cylinders.

This will allow me to set an angle and that will stay when I release the lever.

Dealer quote was $1950 for a self canceling and float detent remote, with install.

 

[Russell King]

You may want to look at

Fit Rite Hydraulics - fitritehydraulics.com

Manufacturers of tractor 3 point hitch top and tilt hydraulic kits, hydraulic top links and hydraulic side links.

www.fitritehydraulics.com

And for the frugal at heart, disconnecting the cylinder hoses from the valve will lock them in place also unless there is an internal leak in the cylinder. But you can’t adjust them until they are connected again.

 

[J329]

Kubota and Land Pride TnT cylinders do not come with lock valves so that pretty much eliminates them.

The dealers quoted the most expensive vakve configuration offered.

Dan

Are you able to install the lock valves on their cylinders or at the end of the line as the other poster mentioned, or am I better off just having the dealer plumb the 2 rear remotes and then buy better quality cylinders from a 3rd party? Thanks in advanced

 

[TheOldHokie]

Are you able to install the lock valves on their cylinders or at the end of the line as the other poster mentioned, or am I better off just having the dealer plumb the 2 rear remotes and then buy better quality cylinders from a 3rd party? Thanks in advanced

Its not a quality issue - its a plumbi g choice by Kubota.

Best guess bssed on the parts diagram is the Kubota cyinders have SAE ports. Mounting a DPOCV on them is going to be tough although I have a (untested) idea.

Nothing special about the top link so an aftermarket with lock valve will work fine. Side link is a different story.

Here is my L3901 with lock valves on the outlets. Seemed like a good idea at the timd and works fine but it means connection/disconnection is always under pressure. I am reverting to standard outlets and putting a DPOCV on the cylinder. The cylinder is s generic aftermarket from Magister.

Dan