Anybody have a L2800/L3400 with remotes AND a BH?

[rbargeron]

...........My understanding is that backhoes only have an IN for pressurized fluid and the OUT is used up fluid - i.e. no pressure.....

Canoetrpr,
If the backhoe valve handles are all centered then the oil passes straight thru. If the BH OUT is connected to another valve's IN, there is full pressure available. But if one of the backhoe valves is moved - pressure is bled off and the downstream function can starve - or worse, it can reverse. This can be a safety issue - if the downstream function is raising a load, it can drop.

Usually the same person operates a tractor and they know what to expect. When someone else operates it, things can get dicey. An example would be if the extra remotes were used to power a thumb on the backhoe. You would want its grip force to be independent of any other hydraulic function.

As I understand it, the design idea behind power-beyond is to eliminate interaction of hydraulic functions to the extent possible. PB makes sure the flow can't go backward from one function to another.

 

[66gladiator]

Pics of the Kubota BL7303 valve and L7314 hose kit mounted on a customer's L3400.

 

[canoetrpr]

Todd:

Thanks for the pictures.

I noticed in the third picture that the existing PB hose from the loader was joined to a host (presumably provided in the kit).

I was planning on just replacing this hose but if I can get away with just unioning it then it would save me some dough.

I imagine that a new hose would be better but a union works.

 

[wushaw]

Mine had that bracket and about six feet of more hose than needed.
I didn't like it so i fixed it to my liking and accessing the hyd filter is easier also.

This kit is for one without a BH.

 

[dfkrug]

My understanding is that backhoes only have an IN for pressurized fluid and the OUT is used up fluid - i.e. no pressure. But in your case the OUT of the BH is going to the IN of the valve. Makes it sound like the OUT of your BH is really a power beyond port going to the remote valve which then passes on the unused pressurized fluid to the hydraulic block for use by the 3PT valve.

Yeah, the hoe valve plumbing is unlike other valves. My Prairie Dog hoe and
my BT751 both have high-pressure IN and OUT and no lo-press return
to reservoir. The OUT behaves like PB, but down-stream valves are not
expected to be operated simultaneously with the hoe it seems. I have
plumbed my hoes between an AUX valve and the 3PH, and also after the
3PH. Both have worked fine.