pto pump to a mahindra 3710 backhoe

[Billself]

I used the backhoe yesterday and it stayed around 150 degrees and of course its cold so that's not what its gonna stay in summer but as of right now I know that i have to much pump for the hoe,but thats how it goes, so ive decided that its gonna have to wait till warmer weather. I hate that i have such a high volume pump i should have just made the pump i wanted and i would have been done but i have a lot of money in this stuff, too much really but as of now i have to use it and then summer come ill probley change it over to the tractor pump and run off that

 

[Billself]

update to the backhoe project i found out that the controller has a closed loop so i had to take the plugs out of the controller to make it an open loop. I was putting to much strain on the pump and dogging it down really bad but now it does pretty good although i will say that it would work much better on a little larger tractor. but for me the only other thing i could do is to use the tractor pump and i have'nt decided on that yet i checked out the Kioti web site and they said 22hp on motor and 16.5 to pto. I think that those few extra ponies might help when it comes to running the hoe a little bit better what do you guys think?

 

[Everhard]

You finding the hoe moves slowly? Or doesn't have enough power? Side question is it frame mounted or 3pth?
As I said earlier mine is run off the tractor, but my hoe is smaller I think, regardless while it works fine it's no speed demon. I accept that it's a small tractor and I need to be patient. I know it won't operate anywhere near as fast as a mini-x. But for the jobs I throw at it it's a million times faster than me and a shovel lol.
For reference the nh hoe I adapted to my tractor is similar in spec to the stock Kioti hoe. The tractor can easily operate it, I normally run between 1800-2000rpm, and the hoe never bogs the tractor down.

E.

 

[Everhard]

Just did a quick Google, is this your hoe?

KMW Ltd. - KMW Backhoe

That's a lot of hoe for the tractor on the bright side the Kioti is a little beast and built strong so I guess it can handle that. But regardless it's always going to be lacking power per their spec for what it should be to run the hoe so I wouldn't be expecting too much outta the tractor! I'd say my hoe for reference is closer in spec to the 1710 which is similar to the stock hoe by Kioti.

E.

 

[Billself]

Yes I do have a sub frame on my tractor for the how. But I think I would have more power if I ran the hydraulics off the tractor instead of the pro pump. For some reason it seems to dog a bit when just moving the boom around I think it's either the pro pump doesn't have enough power or the bypass valve on the machines how is screwed up. I took the plugs out of the wobble sticks controller but I think it would do better if I could just take the bypass off somehow. But if it isn't that then it's because the pto doesn't have as much hp as the motor. Either way it still is lacking in power I do do away with power beyond. Part of it by just removing the plugs from controller. But seems to still be something I'm missing. But I seem to be heading in the right direction. The bypass. Is what I'm thinling because they have been known to have problems. They have a newer bypass they sell for 62.00 but I would just like to do away with it because my pto pump has a bypass in line and it works good. Any ideas??

 

[Billself]

Sorry I replied on my phone and it does that stupid auto correct. So sometimes hoe. Spells how and pto is pro so sorry about that

 

[Billself]

I'd like to some ideas to go on. I know it's in the controls or wobble sticks as there called around here. I'm going to take them completely apart and see if any clogs or garbage in the controls but I was wanting to know if any of you guys ever done anything with these controls on the 3710 backhoe. I need info on why they are not letting the fluid pass much and if you just crack a control then it starts bogging tractor down like the pump has to work extra hard just to move any part even does it on down riggers. Please I need some info on how to fix this. Any ideas????

 

[Dave M7040]

So I bought this used Mahindra 3710 backhoe off a friend of mine and now I am stuck. I bought the smallest pto pump i could find which is 7gpm then i bought a 10gal. tank to feed it , got it all hooked up and now its shutting the tractor down when i start the pto . I capped the PB off sense i don't need it and used a 3/4 suction hose on inlet side of pump and went down to the hoses that came with the backhoe. small dont know what size,prob. 3/8 or 1/4 not sure.Problem is every time i let the clutch out on tractor it stalls it, if i slip the clutch it pumps but at a real strain i have checked the hoses for junk in the lines but clean, then i uncapped power beyond and ran to a bucket it works fine that way, just cant use the hoe know pressure to run it. the only thing i can think of is its too big of a pump. i ran the tractor at diff. rpm to try to force the fluid trough but to much strain,is it possible to run a smaller inlet hose from 3/4 to 1/2 to keep some fluid away from pump side thinking its just to much fluid trying to pass through mahindra controller. I'm just stuck dont know what to do and i need this backhoe as soon as possible. Please any help would be great i really gotta get this going thanks again. PS. pto is at 540 rpm

Starting from your first post and not studying all of them, you CANNOT just cap off the PB circuit. You are dead heading the pump!

You need to find how how power beyond was added to the valve with the PB feature, a special plug or sleeve, and return the valve to one without PB

Dave M7040

 

[Billself]

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

 

[rScotty]

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

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