Can hydraulics for backhoe be used for adding rear controls for hydraulic attachments

[coldsteelva]

Yea, most likely a return.

Just like your loader valve.....it has 3 hoses (not counting the work ports).
1. supply
2. power beyond
3. return

Most tractors with a backhoe added dont need the third line. They just use supply and "technically" power beyond. As what returns from the backhoe actually still goes through the 3PH valve.

But since the tank port on valves isnt rated for pressure........it cannot actually function as a power beyond. Thus most operators manuals will caution you to lower the 3PH lever and NOT MOVE it when the backhoe is attached. Because you could overpressurize that tank passage that they are using as power beyond.

Not an issue as you cant use the 3PH with the BH on anyway.

But if you have a 3rd line.....the one you cap is just a tank line. And the two you loop together...1 is supply.....and you loop it back to the PB line so it will still feed your 3PH

Thank you.

 

[npalen]

Just a thought on saving cost and complexity: I mounted the auxiliary 3-spool valve behind the seat and on the right side with the outlet ports facing to the rear. The quick couplers can then be screwed right into the valve rather than running extra hoses between the valve and connects. I did use 3/8" couplers as there wouldn't be enough room on the valve for directly mounting 1/2" couplers.
I find this handy for 3PT attachments as I'm usually turning and looking back when running 3PT with my right arm over the seat reaching the valve handles.

 

[JakeLS]

Reviving an old thread here.... did you end up installing the remotes? I was curious where you mounted the control valves if so?

I saw a post on the Massey forum where someone made a top and tilt for their rear blade. I think they used the hydraulic quick connects for their BH, but they didn't specify. Would it be as simple as getting a valve, cylinders, and hoses? I'm looking to add tilt to my blade, maybe later angle. I know the basic operation of hydraulics, but have never made any type of addition to a system.

 

[3Ts]

I saw a post on the Massey forum where someone made a top and tilt for their rear blade. I think they used the hydraulic quick connects for their BH, but they didn't specify. Would it be as simple as getting a valve, cylinders, and hoses? I'm looking to add tilt to my blade, maybe later angle. I know the basic operation of hydraulics, but have never made any type of addition to a system.

The answer is Yes, it's that simple.

I was concerned about tapping into my hydraulics, and I needed a backhoe so I talked to my dealer and let him install the backhoe. I did not mention future plans since I didn't have any at that time. There are 3 hoses now to the back of my tractor with QD fittings.

All i needed to do was to identify which was the pressure line, power beyond, and tank. Then I mounted a valve bank (with power beyond) on the fender and put on QDs on the hoses to match the backhoe QDs. I did run a tank line since the valve bank also had that.



This is the Backhoe setup, there are 3 hoses in this picture, but - - the tank line is the one that is not connected and has a yellow tag on it. The other two are connected together and are just to the left of that line. The hose is blocking the view of the connector but you can see parts of the connector on either side.

In the last picture you can see the silver connectors that hook into the Backhoe QDs.

 

[LS Tractor Owner]

Yes, it is as simple as 3T's described. I confirmed that with the dealer on how to hook up the valves. Just like 3T did. I never got around to doing the valves on my MT125. My new 3025 would have had the same set up if I just went with the BH, but when I mentioned getting remotes, the dealer said " that changes the hydraulic setup... It gets hardlines instead of hoses, then the remote valves get one with a detent and the BH feeds / hooks up to the remote with the detent." A much cleaner setup.

 

[Tractor Seabee]

You need a valve for your remotes.

So you need to decide on 2 remotes, 3, etc.

Valve needs to be open center, AND have an optional power beyond plug.

The line currently running to SUPPLY the backhoe needs to be re-routed and NOW supply the new remote valves.

The Power beyond out of the new valve needs a hose added to get back to where your backhoe hookup was. This is the new supply for the backhoe.

You need to ADD a return to tank somewhere from the new valve. This can be Tee'd in anywhere with an existing return line. (the backhoe return is NOT an actual return line, rather that is the feed for the 3PH).

Then you need to add your rear couplers.....mounted however you wish.

You still need to couple the backhoe lines together when backhoe is detached.

Some clarifications and additional ideas:

From the OPs discussion his tractor and BH have 3 lines that attach to the BH; power (P), power beyond (PB), and tank (T). The new remote valve assembly requires the same 3 ports. He does not need to tee in the tank line somewhere, it is already there. Remote valves are A1 and A2, B1 and B2, and so forth depending on number of controlled circuits. All these abbreviations are standard in the industry. Supply and Power are the same. The new valve should come with a diagram and instruction sheet, if not ask for it. Surplus Center (SC) is real good with that and telephone tech services and their prices, except for shipping, are good. They have an online catalog and a paper one.

You might want to evaluate whether one or more valves need detents. A detent holds the valve in the selected position. Better to order that way than convert later. Also, valves to control motors are different than for cylinders; so, if that is in the future maybe add one of those to the stack. For top and tilt you will probably want to add orifices or manual needle valves to slow down movement of those short cylinders. You can get orifices that go into the fittings. I would get stack-able valves rather than mono blocks as they can be added to or taken away in the future. SC can supply all the things you need except matching to your QCs. I get hoses made local so they are the right length not a compromise.

I cannot envision when you would have the BH and other rear remotes connected at the same time as was mentioned earlier.

Best investment when you start to do your own work like this, is to have the Workshop Manual for your tractor. I would not be without mine as well as the Parts Manual. I have my hydraulic and electrical diagrams almost memorized.

As we all go along into this stuff on hydraulics we gradually learn all the standard terminology. Hard to remember when you do not deal with it often. I am just **** when it comes to terminology. Spent a lifetime in the construction world and it is amazing all the different alternative words are used for the dictionary terms.

Ron