pto pump to a mahindra 3710 backhoe

   / pto pump to a mahindra 3710 backhoe #51  
Removing the closed circuit plug in the control valve is only half the job. Most controllers have at least two and some have several different plugs or sleeves that fit into the control valve. Which one you use depends on whether it is an open or closed hydraulic system and whether you want to run power through the Power Beyond port or not.

If you simply removed the closed circuit plug without replacing it with the correct type of circuit plug then all bets are off. Well, not all bets. I'll put my money with Dave who said "..... you CANNOT just cap off the PB circuit. You are dead heading the pump!"

What he is saying is that IF you have found a proper open circuit Power Beyond Enabling Plug (or sleeve) and put it into the control valve, - and each brand of valve uses their own different plug - then if you do that properly and also block off that PB line you are likely to be deadheading the pump. Deadheading should stall the engine. And if it is deadheaded and you rev it up and slip the clutch then something expensive and dangerous is likely to happen.
Be Careful,
rScotty

rscotty.

We are not in disagreement. In his first post he was complaining the tractor would immediately stall when the pto was engaged to drive a pump he had personally bought and connected to the hoe.

Since that post, he has been jumping around removing and reconnecting plugs, sleeves perhaps and then plugging what he believes is the pb circuit. Now he has mamaged to get open center flow unil he moves a control and then:

"The plugs have been removed to allow flow through and when tractor is running the backhoe flow is fine until you pull on the stick to move it and then it starts to bog down and eventually stall tractor but the flow is fine even after I capped the PB as long as you don't pull a lever."

In other words, this hoe, although a commercially manufactured product has, had its heart re engineered by someone without all the knowledge necessarily. Something is not core4ct in the valve!

To understand his system, he needs to provide more details on the forum, a web site to the company who made the hoe, and info on the valve.

He is lucky his pto does not have more power or the broken and destroyed parts would be happening

Dave M7040
 
   / pto pump to a mahindra 3710 backhoe
  • Thread Starter
#52  
I was told the hoe was built by KMW but can't prove it as far as the controller I don't know who made it. I will be removing it from the backhoe as soon as I can and disasymbol the. Controller on clean table . as far as me not knowing what I'm doing well,that's not totally correct I have worked on hydraulics several times before but never anything with power beyond. I don't have the books on the controller so I got to do something to get it to work right therefore that's why I'm here I'll take pics and do my best to describe everything as best as I can but this is my first time taking apart a stacked controller. Usually it's just a monoblock or just cleaning particular parts to get them back and running again.
 
   / pto pump to a mahindra 3710 backhoe
  • Thread Starter
#53  
As I did disasymbol the controller. I did notice a little junk in there but not much I do understand a little better how the controller works along with the PB feature so the only thing I can come up with is that there's a lot more to those stacked blocks than what I'm used too but everything is clean and put back the way I took it apart ,minus the junk that was in it. I got a look inside the inlet block and the way they cut those blocks for different flow throughs is amazing but I think I need to learn a little more before I figure out my next step. Also I don't know how to get the photos from my phone to this thread so I'll work on that too
 
   / pto pump to a mahindra 3710 backhoe #54  
As I did disasymbol the controller. I did notice a little junk in there but not much I do understand a little better how the controller works along with the PB feature so the only thing I can come up with is that there's a lot more to those stacked blocks than what I'm used too but everything is clean and put back the way I took it apart ,minus the junk that was in it. I got a look inside the inlet block and the way they cut those blocks for different flow throughs is amazing but I think I need to learn a little more before I figure out my next step. Also I don't know how to get the photos from my phone to this thread so I'll work on that too

Well, you have my congratulations for taking it apart and having a look. It's the absolute best way to learn.

For your next step you might want to move sideways for a moment and take a look at the difference between laminar and turbulent flow of fluids. Think on how that affects the way you might design a valve passage so it would work smoothly from barely to fully open.
rScotty
 
   / pto pump to a mahindra 3710 backhoe
  • Thread Starter
#55  
Thanks I'll read up on that
 
   / pto pump to a mahindra 3710 backhoe
  • Thread Starter
#56  
I've been reading up on that. And I find it fascinating I wish I had a way to see the fluid in action that way I could control the way the flow of the fluid goes through the controller to make it work smoother the only way I know of doing that would be porting and polishing the inside of the controller which is impossible for me with the tools I have. But man that's a great read. Thank you
 
   / pto pump to a mahindra 3710 backhoe
  • Thread Starter
#57  
As soon as weather permits I'll put the controller back on how and see if it made a difference. I doubt it but I think I need a type of sleeve to only let the fluid go where it only needs to go but I haven't figured that out yet on which cavern will allow flow without backflow through controller. I wish I could post pics but don't know how.
 
   / pto pump to a mahindra 3710 backhoe #58  
As soon as weather permits I'll put the controller back on how and see if it made a difference. I doubt it but I think I need a type of sleeve to only let the fluid go where it only needs to go but I haven't figured that out yet on which cavern will allow flow without backflow through controller. I wish I could post pics but don't know how.


OK, Bill, glad to hear you are still having fun with that controller. I believe you are right, there should be a sleeve to direct the flow. In fact, there are usually two sleeves available for every make of controller and when you buy the controller it is common to specify whether you want the sleeve for an open circuit or closed circuit hydraulic system. Your Mahindra will be open circuit type.

Below is a real basic tutorial on how I attach photos to a message. TBN has a very sophisticated Attachment and File Upload Manager and it can be a bear to figure out the first time. So here is a very basic method; there are lots of nuances and tricks to be learned, but this will allow you to attach photos - or any type of file - to a TBN message.

1. To attach a photo to a message you have written in the Reply box, first write your message, and then go down to the bottom of the box where it gives three options: Post Quick Reply, Go Advanced, or Cancel.

2. Chose "Go Advanced", and you will see a box holding a Preview of your message looking just as it would be posted. You cannot edit your message in that box, but right beneath the Preview is another box labeled Your Message showing yet another copy of your same message but in a format which allows you to edit it. And most importantly, one of the editing things you can do now is you can attach photos or files to your message.

3. Now look a bit farther down the page beneath your edited message until you see an area labeled "Additional Options". To add a file or photo you first click on "Manage Attachments".

Clicking on "Manage Attachments" has opened yet another box called a "File Upload Manager". Look to the upper right corner where you will see a green circle with a plus sign in it that is labeled "Add Files". Click on this circle.

4. Yet another box opens! This one has the option to "Choose Files" which you now select by clicking on it. As soon as you do, it will automatically take you to the directory of your computer where you can then select whichever files or photos you want to include beneath your TBN message. Select one photo or file or as many as you want. Each one that is selected turns blue on my computer (a Mac). When you've selected all the photos you want, go to the bottom of the directory box that you are in where you have an option to "Cancel" or "Choose". Pick "Choose".

5. By picking "Choose" you got instantly transported back to the "File Upload Manager" where you were before, but notice that there is a slight difference: The sub box on the right top where you last selected "Choose Files is now open"...... That's all normal, but since you have already chosen the files you want, this time you click on "Upload".

6. When you clicked on "Upload", you will see a thumbnail size copy of the file you have selected automatically appear in the "File Upload Manager" in the lower left area labed "Attachments" .
You are almost done....just go over to the right and click on the box that says "Done".

7. After clicking "Done" you are now transported back to the original message you were going to post but if you go down the page and look under "Attachments" you will notice that the name of your file is included. If you now go over to the right of the page you will see a choice to either "Submit Reply" or "Preview Post". I use "Preview Post" which allows me to take a look at my reply just as it will appear, or edit it more, or even change/add more attachments.

8. If you like what you see, click on "Submit Reply" and your message with file/photo attached will appear in TBN.
If at any point in this process TBN chokes and gives you an error message I just ignore it and continue on to Preview Post again - which seems to somehow take care of the error.

9. For a discussion of more advanced posting methods, there is an ongoing TBN forum where there are other explanations and methods of attaching everything from Photos to Videos to your TBN posts. It is in the Community forum under sub-heading:
"Photos".
The complete URL is:
https://www.tractorbynet.com/forums/photos/107314-photo-posting-how.html#post1220148

10. Hopefully this helps to get newcomers over the photo posting hump,
and may your tractor run perfectly forever !

Enjoy, rScotty
 
   / pto pump to a mahindra 3710 backhoe
  • Thread Starter
#59  
Pics of controller
 

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   / pto pump to a mahindra 3710 backhoe
  • Thread Starter
#60  
Not very good at posting pics but if you guys need more pics let me know and thanks for helping me with this
 

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