Power Beyond for chipper

[RPK]

Knowing that I am not an expert on tractor hydraulics here are my questions.
1. If I get a chipper with hydraulic feed, can I hook the chipper up to the "power beyond" connection that is used for my BH90?
I know that the 3ph is diabled when the backhoe is connected.
2. Would it make sense to connect and disconnect the chipper to the power beyond to raise the 3ph in order to move the tractor around?
3. Last. Will my L3130 supply enough hydraulic flow for a 6" or less hydraulic feed chipper ?
Thanks for all the expert help.

RPK

 

[Farmerford]

RPK:

The general answer is that you can easily get hydraulic power from the tractor's system to power the chipper feed motor, and you should be able to do so without disabling the TPH. The exact nature of the hookup will depend on how the chipper drive is configured and how your tractor system is configured. You will probably need to install the equivalent of a rear remote four way three position control valve with a detent. Kubota has rear remote kits that are probably $500 to $600 and are easy to install. This will splice into the power beyond off the loader valve and only two hoses will be required from the valve to the chipper.

I suspect the L3130 provides 6 to 8 gpm of flow (after the power steering priority flow) which should be more than adequate to operate the drive motor. Your owner's manual should have the pump capacity. The chipper manufacturer will also have precise specs.

I have a Vermeer 6" PTO chipper on a L2900, and even on pine I have to reduce the feed to almost its slowest rate with 5" logs and over to avoid stalling the tractor. The Vermeer has a self contained hydraulic system (pump driven off the chipper gearbox), but I doubt it produces more than 4-5 gpm.

 

[GV40U]

I have a hydraulic feed chipper attached to an L3430. The tractor has plenty of hydraulic flow for the feed. The chipper has a flow control valve to adjust the feed rate and I have it turned pretty far down. As far as hydraulic connections, I have the power beyond loop for a BH90 backhoe and 2 rear remotes. After I checked the price of quick connect fittings for the the power beyond circuit then looked in the parts box and found spare quick connect ends for my remotes I went the "connect to rear remote" route. I think the power beyond connection would be much cleaner with no need to bungi a rear remote valve open for flow and I'll probably get there sometime. I'm not sure about the 3PH functionality with the power beyond connected to the chipper but it would seem that there would be no difference between having the fluid flow out to an open center system on the chipper and return to the tractor (similar to a log splitter) than making the loop out and back without the BH90 connected. In both cases, the fluid flows out and returns to the tractor otherwise bad things will happen. Good luck with your setup.

 

[RickB]

I'll have to assume the hydraulic flow characteristics for these Kubotas is like New Holland compacts. The details of the original post and my experience suggest they are. It is perfectly fine to power the chipper feed valve with the power beyond circuit intended for the backhoe. The downside is the three point will be disabled because the return flow goes directly to tank. Using a rear remote valve with the control held in a stroked position with a bungee or integral detent will power the chipper's feed valve just as well. The upside to this arrangement is the continued functionality of the three point hitch so long as the tractor remote is returned to neutral. The tractor's remote valve(s) have priority over the three point hitch. The power beyond loop intended for the backhoe intentionally disables the 3PT in order to protect the hitch, hydraulic pump, and backhoe control valve from inadvertant damage.

 

[Phineas7]

Don't take this as an opinion, but a question to help clarify my understanding of power beyond hydraulics.

My understanding is that there is constant flow of fluid thru the system. Multiple implements can be connected in series. When a valve is operated the fluid is redirected to the cylinder (for example). The output of that cylinder is sent to the tank. When the cylinder can no longer move, the pump is under excessive load, while tollerable, is not meant to be maintained.

IF that is correct, then I have a questions about a flow control valve. Does the "unused" fluid get redirected back to the tank? Or is the flow thru the entire system restricted? If the later; Would this cause problems with the pump?