3point backhoe

[Rory_Rhodes]

I just purchased a used Bush Hog, mounted on a subframe with the aux hydraulic. When I priced what the package was worth, I was quoted $300 for the subframe steel in addition to the cost of the BH and the pump. The backhoe can also be a three point hitch mount. Seems reasonable to get a subframe that is ready to mount, holes drilled with hardware. If you want, I can send pictures of the stup this weekend. Send me a PM and I will post.

 

[Rory_Rhodes]

I just purchased a used Bush Hog, mounted on a subframe with the aux hydraulic. When I priced what the package was worth, I was quoted $300 for the subframe steel new in addition to the cost of the new BH and the pump. The backhoe can also be a three point hitch mount. Seems reasonable to get a subframe that is ready to mount, holes drilled with hardware for $300. If you want, I can send pictures of the setup this weekend. Send me a PM and I will post.

 

[Renze]

5030:

Theoretically, i just dont agree. If the load is between the outriggers there wont be torsion in the length axis of the tractor...

Practically spoken, i agree with you very much because when you can break a top link, you'd better be thinking of what forces you're playing with... /forums/images/graemlins/blush.gif

Last winter i've built my own subframe for a used loader i bought, which is now mounted on a Zetor 5245. I'm still not done as i'm adding paralel linkage (self levelling) to it, and with a better oil pump on my tractor as well, i must be able to upgrade it to 1300 kg lifting force, to handle allmost anything on the farm, with bucket, bale spike, pallet forks, manbucket.
(And a grapple rake which will probably have to wait till next winter before i've got time... ) /forums/images/graemlins/tongue.gif
With some serious lift on a relatively small tractor there are quite some forces on it.
I've seen enough pictures of "articulated" tractors on the internet that broke right behin the clutch housing, where it is most narrow. I have built a frame fully extending to the rear axle, with a future backhoe attachment kept in mind.

I attached a picture of my frame

Just look at truck mounted cranes, their subframes are sometimes 3 times as strong.
I worked at a railway construction machinery workshop. They had 2 Renault trucks that could also work on railroad wheels. Both these trucks had bent and cracked frames, because the rail wheels (hydraulic lowered) were mounted on front and back of the truck, the bend force on the frame was more than when the weight was on the normal 4 road axles. /forums/images/graemlins/blush.gif /forums/images/graemlins/grin.gif

Using something for a duty it wasnt designed for allways needs extra engineering caution

 

[Maine_Polack]

I am contemplating purchasing a "Skidsteer" backhoe to use on the front of my tractor.

I really don't want to have a backhoe on the rear. I would like to "Quick Attach " and go.

I have a fairly heavy Mahindra 6500.

What is the thinking on a QA hoe used on a tractor?

 

[5030]

Renze:

You seem occupied with the top link. The top link on a 3 point rear mount backhoe is replaced with a steel arm, most either machine or laser/flame cut that literally "hangs" on the upper pin. The hanging load removed when the outriggers are engaged with the ground. Here is the rub, the outriggers remove the torsional load when the backhoe is operated in a plane not parallel to the center axis of the tractor "so long as the outriggers ground engaging force is not overcome by the angled pull of the bucket on the backhoe". Under ideal conditions, the pads on the outrigers should prevent a sideways crab of the backhoe/tractor, however, most often times, those conditions are not ideal, such as pads on concrete, loose soil, mud, loose substrate, all conditions that allow the torsional load to be placed directly on the lower arms and transmitted to the rear case of the tractor, hence a subframe to strengthen and carry the torsional load to the tractor frame.

 

[5030]

That's not a bad idea, however, if the QA hoe uses tractor hydraulics, how do you plan to hook it up?

 

[Maine_Polack]

I have two remotes, one of which is already run to the front for a grapple hook-up.

This talk about stresses got me to wondering how/if it would affect my loader set up, which is quite stout. I don't think it will bother, but I've been told that I really don't know everything, so I thought I would ask.

 

[Renze]

O.K. thanks for the clarification...

Yes we dont have any 3pth backhoes in Holland.. I think they are rare in Europe in general...

You do see trailed hoes at farms, with a big lump of concrete counterweight. Mostly of Italian manufacture, Dalla Bona and Argenterio.

Here is one standing at my dealer's yard:
http://www.rietmanhasselt.nl/IMAGES/Gebruikte%20Mach/Hydro%20kraan.jpg

Most of them are old, new ones arent sold because they became unpopular... changing from hoe seat to tractor seat every time takes too long...

Some folks that use them for ditch cleaning in the bog field dairy operations, mounted solenoid controlled valve blocks on them to operate from the tractor seat. It's easy to attach though: just a drawbar pin and a PTO shaft for the pump... and nothing's easier on the tractor.

 

[Renze]

Oh and about breaking top links: That's what contractors do when dozering half a truckload of fill at a time, with a Dutch harrow made of heavy train rails, 3 or for beams in a row.. /forums/images/graemlins/smirk.gif

 

[5030]

Mahindra's are stout, they just have a terrible seat.

I saw a couple at Michigan Seat in Jackson a few years ago. Michigan Seat was designing a new seat and it needed it.