B3300SU with PB BH and rear remotes?

[J_J]

You can save more on 1/4 in hose and fittings for the grapple , and will work just fine.

 

[CDN Farm Boy]

Thanks for the help guys, much appreciated.

 

[CDN Farm Boy]

Ran into a snag today. Discovered that the 3pt hitch already runs off the PB port from the loader valve. Apparently the 3pt hitch control lever needs to be locked in the down position to use anything in the PB loop, like my backhoe. Not a big deal with running the backhoe but obviously that won't work if I want to use the PB loop to supply the new rear remotes for use with anything other than the backhoe. Kubota wants $800 for the kit to add one valve and I still want 3.

How do I solve this problem?

 

[J_J]

Why don't you use the PB from the FEL, or hyd block and run it to a 4 spool remote valve and then run it to the 3pt.

To run the BH, install a QD on the PB hose going to the remote and use that to power the BH.

https://www.surpluscenter.com/item.asp?item=9-7977&catname=hydraulic

https://www.surpluscenter.com/item.asp?item=9-7978&catname=hydraulic

The 3pt is the last valve in the hyd series flow path, and should have nothing to do with the BH.


Can you outline your flow path from pump to 3pt?

 

[CDN Farm Boy]

Dealer is telling me that if I have the 3ph control in the neutral position, hyd fluid will be going over the relief while using the BH.

Hydraulic diagram from my WSM:


Dealer was kind enough to send me the install instructions for the Kubota remote valve kit which if I'm reading it right goes like this:
- PB from loader valve to in port of new valve
- Return port from new valve T into return of loader valve
- PB from new valve to 3ph - Indicates that I'd still use this line as I do now for the BH but one of the new sets with detent would be much simplier

I guess the main difference is the return line from the new valve and using the PB to the 3ph rather than the return line

 

[CDN Farm Boy]

Woo Hoo! The diagram worked!

 

[J_J]

When you are using the BH, is the 3pt functional?

When the 3pt is in neutral, the fluid if available and is flowing through the valve to tank,

The 3pt relief only comes into play when the 3pt cyl is overloaded, or you keep it in the raised position.

 

[CDN Farm Boy]

When you are using the BH, is the 3pt functional?

Never actually tried to run both at same time but the BH seems to work fine with the 3pt lever in neutral and I have moved the 3pt with the BH connected just to adjust the position of the arms.

When the 3pt is in neutral, the fluid if available and is flowing through the valve to tank,

The 3pt relief only comes into play when the 3pt cyl is overloaded, or you keep it in the raised position.

That's what I thought. If I read the diagram right, the 3pt (item # 3 - hydraulic control valve) looks like an open center valve so it should have free flow in neutral.

The BH valve is open center.
The Kubota additional valve is closed center with PB

The operator manual states (which seems to contradict what the hyd diagrams show):
- Backhoe must be removed when using any rear remote valve, 3-point hitch, or any hydraulic component that is downstream of the backhoe valve. Failure to follow this instruction will result in valve damage.
- When backhoe is attached, make sure to properly secure the hydraulic control lever in the "DOWN" locked position. Accidental operation of the hydraulic control lever will result in valve damage.

 

[J_J]

There is something wrong here.

You can't mix valves from the different hyd systems.

Closed center valves do not have PB as the valves are in parallel.

 

[CDN Farm Boy]

I'm glad it's not just me that it's not making sense to.

From the Kubota rear remote install instructions:
Note part #1 3-Position 4-Way Normally Closed Valve Section and and part #3 Outlet Section with Power Beyond.


Hyd diagram of valve:


The complete install manual is a 13 page pdf