Backhoe fittings for 3rd function?

[Mowbizz]

Sure. I am not familiar with the specifics of your machine but if its like most you should have two hoses going to the hoe. One is the pressure supply from the tractor and one is the return from the hoe. Disconnect the supply hose going to the hoe and use a new hose and quick connector to connect that hose to the pump IN on the new valve. Then use another hose and quick coupler to connect the OUT on the valve to the hoe. Thats it. Your valve/ grapple will work with the hoe on the tractor. If you take the hoe off just loop the new hose going to the hoe into the return line like you have been doing.

Now before I get chastised this setup should really be using a valve with a power beyond port to feed the hoe and a separate tank return port hooked to the tractor. That plumbing is a little more involved but still easy to do. You just need to add a tee to the tank return line on the loader valve and use a third hose to hook the tank port on the new valve to it. Three hoses gives you a "real" third function and/or remotes.

If you buy a valve with more than one spool you use the same hookup and it gives you multiple remotes.

Dan

So, is a “spool” the same as a valve or diverter or just part of one? Thanks

 

[TheOldHokie]

So, is a “spool” the same as a valve or diverter or just part of one? Thanks

In this context a spool is the rod that slides in and out inside the body of the valve and directs the flow of oil. Each spool controls one function - e.g. your loasder valve has 2 spools - one for the bucket and one for the boom. The add-on valve in my picture has one spool for controlling the grapple. Here is a six spool valve - it would be plumbed just like a one spool valve but you probably don't want to go that far

Dan

 

[Mowbizz]

In this context a spool is the rod that slides in and out inside the body of the valve and directs the flow of oil. Each spool controls one function - e.g. your loasder valve has 2 spools - one for the bucket and one for the boom. The add-on valve in my picture has one spool for controlling the grapple. Here is a six spool valve - it would be plumbed just like a one spool valve but you probably don't want to go that far

Dan

View attachment 76576

Thanks, now I know!

 

[DustyRusty]

For the BX22 (2004) Kubota offered a valve and some fancy way to plumb it, but the problems were that the hoses came too close to the cooling fan on the hydro. I found that I could feed the valve with the backhoe lines, and all I had to do to complete the circuit was to add a return from the valve to the side of the hydro unit. It worked well until the valve failed, and I couldn't figure it out, so I removed the cab and the valve, etc., and dropped it off at the Kubota dealer service department telling them that I couldn't get the 3 point hitch to work properly. They tested it and determined that the problem was the pressure, and installed a shim to correct the pressure, and the 3 point hitch was repaired. When I got the tractor back, I reinstalled the cab and the valve and plumbing, only to find that the 3 point hitch stopped working again. Only then did I connect the dots that it was the failure of the valve that was causing me all the problems. I removed the valve and hoses and everything was well again. Had I hooked it up the way that Kubota recommended, it probably wouldn't have affected the 3 point hitch. The lesson that I learned, is that just because you can, doesn't mean that you should. That is why I purchased the LandPride 3rd function valve for my BX23S rather than going the "inexpensive" route as I had done with the BX22.
Part 1 of the saga... https://www.orangetractortalks.com/forums/threads/3-point-hitch-problem-on-a-bx22.38020/
Part 2 of the saga.... https://www.orangetractortalks.com/forums/threads/rear-remote-valve.43350/

If you are bound and determined to go this route, here is a BX7322 remote kit new in the box for you. The only thing that is missing is the hose kit, which you will not need since the hoses are a lot longer than you will be able to use. Good luck and if you should need some help, I am only a keyboard away. Just hope that you don't ask me the difficult questions, since it was about 15 years ago that I had done this, but I still have the skeletons in the garage. I hate to ever throw anything away. Don't believe me, then ask my wife!

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[Mowbizz]

Lots of expertise/experience on here…thanks to all for explaining the 3rd function trials and errors. Looks like biting the bullet and getter by the proper equipment and connections is the smart way to go. Seems like trying to jury-rig things leads to future troubles if you are un-lucky!

 

[TheOldHokie]

Lots of expertise/experience on here…thanks to all for explaining the 3rd function trials and errors. Looks like biting the bullet and getter by the proper equipment and connections is the smart way to go. Seems like trying to jury-rig things leads to future troubles if you are un-lucky!

More like a BB than a bullet.

Dan

 

[L4701CN]

All you need is a $75 control valve and a couple hoses. Its essentially what I have on my grapple.

Dan

View attachment 76557

I know this post is a little old but just coming across it. Is this the same valve you used?

 

[TheOldHokie]

I know this post is a little old but just coming across it. Is this the same valve you used?

No - thats a complete loader valve. This is all you need for third function. You akso need the power beyond conversion sleeve.

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Dan

 

[L4701CN]

No - thats a complete loader valve. This is all you need for third function. You akso need the power beyond conversion sleeve.

Monoblock Hydraulic Directional Control Valve, 1 Spool, 11 GPM

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Dan

I appreciate that.

No - thats a complete loader valve. This is all you need for third function. You akso need the power beyond conversion sleeve.

Monoblock Hydraulic Directional Control Valve, 1 Spool, 11 GPM

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Dan

I appreciate that. I'll get one on the way, with the conversion sleeve. So the conversion sleeve will go on the valve and the lines from the backhoe will just supply correct? Sorry for all the questions but I can't seem to find the info online. Thanks again

 

[Russell King]

You have to think of it as a continuous loop of pressure from the pump to three point (last valve in circuit normally). Each valve has to allow the pressure to pass through or the next valve won’t work properly. The power beyond sleeve opens that passsage for pressure to pass through.

 

[TheOldHokie]

I appreciate that.

I appreciate that. I'll get one on the way, with the conversion sleeve. So the conversion sleeve will go on the valve and the lines from the backhoe will just supply correct? Sorry for all the questions but I can't seem to find the info online. Thanks again

Hey questions are why we are here!!
People that dont/wont ask questions either dont learn or they learn the hard way.

I will give you the exact plumbing hookup for your tractor but I need to make sure I know what you have. Its an l4901 with BH92 backhoe? Do you have any other rear remote valves on it? Based on your question I assume not but just double checking.

Dan

 

[L4701CN]

Hey questions are why we are here!!
People that dont/wont ask questions either dont learn or they learn the hard way.

I will give you the exact plumbing hookup for your tractor but I need to make sure I know what you have. Its an l4901 with BH92 backhoe? Do you have any other rear remote valves on it? Based on your question I assume not but just double checking.

Dan

Yep, l4701 with BH92 backhoe. No other rear remotes, just the 2 connections for the hoe.

 

[TheOldHokie]

Yep, l4701 with BH92 backhoe. No other rear remotes, just the 2 connections for the hoe.

OK - here we go.

This diagram should be your current loader and backhoe plumbing. The loader valve is supplied from the hydraulic outlet block under the right side footboard and the backhoe is fed from the power beyond port on the loader valve. I have drawn the loader valve showing the relative attachment locations for the three hoses. Before doing anything please confirm that this matches what is on your tractor.

Here is the new plumbing with the 3rd function valve mounted to the side of the loader valve.

1. The T port hose on the loader valve has been moved to the T port on the SIDE port of the 3rd function valve. You are probably going to need to use a longer hose to get it to reach.
2. A new shorter hose has been used to connect the T port on the loader valve to the T port on the TOP of the 3rd function valve.
3. The power beyond (PB) hose on the loader valve has been moved to the N port on the 3rd function valve. You should be able to reuse the existing hose.
4. A new shorter hose has been used to connect the PB port on the loader valve to the P port on the 3rd function valve.

And finally an actual picture of my LA525 with a two spool valve and those connections. Notice the power beyond conversion sleeve has been screwed into the N port on the aux valve and and the hose is then connected to the sleeve. Its a pretty easy job and once you get the valve mounted the replumbing should only take about 30 minutes.

 

[L4701CN]

OK - here we go.

This diagram should be your current loader and backhoe plumbing. The loader valve is supplied from the hydraulic outlet block under the right side footboard and the backhoe is fed from the power beyond port on the loader valve. I have drawn the loader valve showing the relative attachment locations for the three hoses. Before doing anything please confirm that this matches what is on your tractor.

View attachment 127776

Here is the new plumbing with the 3rd function valve mounted to the side of the loader valve.

1. The T port hose on the loader valve has been moved to the T port on the SIDE port of the 3rd function valve. You are probably going to need to use a longer hose to get it to reach.
2. A new shorter hose has been used to connect the T port on the loader valve to the T port on the TOP of the 3rd function valve.
3. The power beyond (PB) hose on the loader valve has been moved to the N port on the 3rd function valve. You should be able to reuse the existing hose.
4. A new shorter hose has been used to connect the PB port on the loader valve to the P port on the 3rd function valve.

View attachment 127777

And finally an actual picture of my LA525 with a two spool valve and those connections. Notice the power beyond conversion sleeve has been screwed into the N port on the aux valve and and the hose is then connected to the sleeve. Its a pretty easy job and once you get the valve mounted the replumbing should only take about 30 minutes.




View attachment 127779

I really appreciate that. Im ordering the valve and conversion sleeve today. I do need the no detent valve correct.? Thanks again for your knowledge.

 

[TheOldHokie]

I really appreciate that. Im ordering the valve and conversion sleeve today. I do need the no detent valve correct.? Thanks again for your knowledge.

For a grapple you would typically use a spring center valve that requires you to hold the hsndle to maintain flow ' e.g. open or close the grapple. When you let go the valve shuts off automatically.

Detent is a feature that locks the valve and allows you to remove your hand while still maintaining flow. You have to manuslly move the valve back to center to shut off flow. That would be useful for a hydraulic auger but not a grspple.

Dan

 

[L4701CN]

Alright.. Im a truck driver and don't have a lot of free time, so I'm just getting to work on this. I'm not totally stupid but I have added some pics. Of my loader valve, 3rd function valve and hydraulic block. Could you possibly mark which one is which on the block and loader valve? I really appreciate all the help. I will post a pic once installed. Thanks again.

 

[TheOldHokie]

Alright.. Im a truck driver and don't have a lot of free time, so I'm just getting to work on this. I'm not totally stupid but I have added some pics. Of my loader valve, 3rd function valve and hydraulic block. Could you possibly mark which one is which on the block and loader valve? I really appreciate all the help. I will post a pic once installed. Thanks again.

Sorry for the tardy reply - dropped my phone while mowing and have been trying to find it No luck

You don't need to touch anything on the outlet block.

Here are the two hoses on the loader valve that you need to reroute.

Here are the connections on your 3rd function valve