please confirm my BH hookup on my Kubota

[jemmy3]

Hello folks,

I have a Kubota MX5000, and recently picked up a used Woods BH9000 backhoe w/ subframe to mount on this tractor.

I used the search function, and found loads of great information on here!
I think I have it figured out, but would like to have it confirmed for safety reasons....

My FEL has 7 ports:

1 IN
1 OUT
1 PB
4 QC'c to the loader

My understanding is that I disconnect the lower end of the PB line [coming from the FEL by the filter, under the right floorboard], extend that line to the "IN" of the backhoe, and put the "OUT" line from the backhoe back onto this one and only connection I took off. The hoe came w/ lines long enough to do this, but I never saw it hooked up.....

Is this correct?

thx,
John in WV

 

[RonMar]

Hello folks,

I have a Kubota MX5000, and recently picked up a used Woods BH9000 backhoe w/ subframe to mount on this tractor.

I used the search function, and found loads of great information on here!
I think I have it figured out, but would like to have it confirmed for safety reasons....

My FEL has 7 ports:

1 IN
1 OUT
1 PB
4 QC'c to the loader

My understanding is that I disconnect the lower end of the PB line [coming from the FEL by the filter, under the right floorboard], extend that line to the "IN" of the backhoe, and put the "OUT" line from the backhoe back onto this one and only connection I took off. The hoe came w/ lines long enough to do this, but I never saw it hooked up.....

Is this correct?

thx,
John in WV

Not being specifically familliar with these components, my questions would be:

1. What is down stream of that loader's PB line now, IE: What will the line comming back from the BH be feeding when connected as you describe?

2. Is the return port on the BH control valve rated for high pressure? In general, most valve bodies with a single return line, because they are connected to the return galleries at the ends of the spool valves, are not rated for high pressure on the return line. It must be a low pressure return path to the resovoir. There are of course exceptions to this, but like I said, I am not specifically familliar with these pieces of equipment.

Woods should have the answer to question 2, and should have correct hoock up instructions for this BH/tractor configuration. I would give tham a call.

 

[MJPetersen]

While I am not familiar with your particular set up, I would guess that the PB line from the the FEL valve continues flow to the 3pt. Normally BH have only the 2 lines, that is pressure and return. The return, as Ron pointed out, should not be pressurized with system pressure. If you hook it up as you suggest it will work, but if while it is connected, someone moves the 3pt lever to the up position it will pressurized the return line of the BH and could damage the seals in the BH valve body.

Normally what is recommended is that you connect the "IN" line of the BH to the PB outlet of the FEL valve and the "OUT" line to the return to the sump. If my picture of your system is correct, then this will "bypass" the 3pt and render it inoperable when the BH is connected. That is not a problem for a subframe BH like yours, but a simpler solution, would to do it like you suggest and mechanically lock the 3pt control lever in the down position, so that it cannot be moved accidentally.

One note of caution, make double sure that your connections are always full and complete when you put the hoe on. And that the PB line is connected to the 3pt when the BH is not mounted. Failure to do so will result in a tragedy of a sheared key on the pump shaft or worse a broken pump housing. A through flow is always necessary.

Have fun,

Mike

 

[RonMar]

One note of caution, make double sure that your connections are always full and complete when you put the hoe on. And that the PB line is connected to the 3pt when the BH is not mounted. Failure to do so will result in a tragedy of a sheared key on the pump shaft or worse a broken pump housing. A through flow is always necessary.

Have fun,

Mike

Tragedy, or a real big mess if left disconnected/loose

 

[MJPetersen]

Tragedy, or a real big mess if left isconnected/loose

Yes Ron, I was thinking tragedy if Quick couplers were installed But you are right--even on a small pump if you put that oil on the outside it looks like LOTS!!!! One quart looks like a gallon when it is spraying all over!!!

Mike

 

[RonMar]

Since he said that the working ports on his loader control valve had the QC's, I got the idea that the valve stays on the tractor when the loader is removed, so I assumed the supply, return and PB lines were hard plummed.

But you are exactly right about leaving a mainline with QC/s disconnected. Something is going to give, and that give usually ends with your wallet, and that is the real tradgedy

 

[jemmy3]

Since he said that the working ports on his loader control valve had the QC's, I got the idea that the valve stays on the tractor when the loader is removed, so I assumed the supply, return and PB lines were hard plummed.

But you are exactly right about leaving a mainline with QC/s disconnected. Something is going to give, and that give usually ends with your wallet, and that is the real tradgedy

Yes, the FEL valve stays on , when the loader is removed.
Hard plummed? They are not steel lines, regular flexable rubber.
The 3 lines going to the loader, IN, OUT, PB, all come from the same block, by the hyd filter, under the right floorboard. The PB line looks like it's meant for higher pressure, as it' appears to be wrapped w/ an extra layer of material.
[both of my backhoe lines are wrapped in similar material as well, and have QC's near the hoe, so both lines could be hooked together to complete the circut when not in use]

In my operator's manual, it shows 3 plugs in this block when the implement [in my case, loader] is NOT installed, and also a "Control Screw" that should be horizontal.[vertical when installed], so I doubt this feeds the 3 pt. hitch.

The BH came off of a Kubota 4310

I'll try to get some pics up to help, thx,
John

 

[RonMar]

By hard plummed, I meant using pipe fittings and requiring tools to disassemble, but it could also mean with hard lines.

 

[jemmy3]

Here is my loader valve w/ the PB connection on the bottom [in the pic]:

 

[jemmy3]

Here is the block below the right side floorboard where the FEL lines attach.
The PB line is the one on the left w/ the red tape: