small backhoe

[pnfz]

just finished building a small backhoe for my garden tractor, i think the design can be scaled up for compact tractors. it's less than 350lbs, has dual hydraulics for simultaneous cylinder action, digs 5' deep, 8' reach, hydraulic stabilizers that spread to 7'-6" and an integral oil reservoir in the frame.

 

[Anonymous Poster]

PNFZ,

looks like a great accomplishment!

Three cylinders between the tractor and the bucket! Interesting. Don't think I've seen more than two before...but I don't know much /w3tcompact/icons/smile.gif

Thanks for sharing your work with us. How does it dig?

Bill in Pgh, PA

 

[MossRoad]

Very, very nice. Looks clean. Did you design it yourself or purchase plans?

 

[pnfz]

thanks, i designed it myself. i wanted a hoe that was light enough to use on the garden tractor and could curl up tight enough for good weight distribution during transport. that out board slew cylinder lets me mount the hoe as close as i want to the tractor and gives me 170 deg. boom rotation.

it works great!

~ Paul

 

[Inspector507]

Paul,
Looks great!!!!

 

[zenmek]

Paul,
Showed the wife, she said is that a cub cadet hoe? It looks like an original equipment part! Excellent job...wouldn't mind seeing a picture of the loader also /w3tcompact/icons/grin.gif

 

[MossRoad]

I've got a pretty good understanding of how the boom, dipperstick, bucket work and are assembled. But how does the pivot left to right work and how is it assembled? I see the cylinder that pivots it. I've seen a CAD plans under construction. There is a pin in a tube that acts as the bearing. I guesss that would be where significant loads would be encountered. Do you have any close-ups of that area? It would be greatly appreciated. Again, great looking hoe. /w3tcompact/icons/smile.gif

 

[Anonymous Poster]

That's a great looking backhoe! Does it run off the tractor hydraulics or have its own pump. I think you should scale it up, say to John Deere 4310 size!!

 

[pnfz]

here is a pic of the loader, it's also my design...
last years project.

i have more pics of these on my site http://www.p.f.engineering.50megs.com

~ Paul

 

[pnfz]

it would run off tractor hydraulics, if i had 'em.
i ended up extending the hydro output shaft for a rear PTO to belt drive a dedicated pump for the hoe.
a single pump could have run both loader and hoe, but i think the plumbing is simpler this way.

i don't think it would take much to scale up, it's a fairly simple design.

~ Paul

 

[bubenberg]

nice professional job, good luck and many digs.

 

[Iceman]

See post below

 

[bubenberg]

Iceman, i think you want to say this to pfnz, not to me. sorry

 

[Iceman]

Looks very professional, can't believe you were able to mount that to the Cub.

What HP is your Cub and how much can you lift with the loader?

 

[gerard]

<font color=blue>Three cylinders between the tractor and the bucket! Interesting. Don't think I've seen more than two before</font color=blue>
There are always 3 macher - just not always obvious - sometimes partially hidden inside the boom arm etc but you need three. One moves the whole unit up and down, one "crowds" the dipper stick, and one curls the bucket. The you need a way to swing the unit back and forth. Thats' why you have two joysticks, each of which controls 2 functions for a total of 4.

 

[pnfz]

iceman, the Cub is a 14HP kohler with hydro trans.

the loader is running 2" bore cylinders at 750psi, this puts lift capacity over 500lbs, which is more than my little tractor should reasonably attempt. i have lifted heaping buckets (.21 cu.yd.) of trap rock gravel with no problem, my guess 350lbs, that is with the hoe for counterweight.

 

[JDGREEN4ME]

Nice job! looks Great! !

 

[Anonymous Poster]

Hi,

Me:

<font color=blue>Three cylinders between the tractor and the bucket! Interesting. Don't think I've seen more than two before</font color=blue>

Gerard:

<font color=red>There are always 3 macher - just not always obvious - sometimes partially hidden inside the boom arm etc but you need three...</font color=red>

/w3tcompact/icons/shocked.gif/w3tcompact/icons/blush.gif/w3tcompact/icons/laugh.gif

Yes, obviously true! How many times have I greased those pins on mine?

Guess it just looked different with all three exposed�cincluding the one that is normally hidden�c/w3tcompact/icons/smile.gif

Now that I think about it, I was still technically correct. I said I didn't think I had <font color=red>seen</font color=red> three cylinders before...

Yea, right.../w3tcompact/icons/grin.gif

Bill in Pgh, PA

 

[gerard]

/w3tcompact/icons/laugh.gif /w3tcompact/icons/laugh.gif It DOES look unusual at first glance!!

 

[ljh2]

Real nice project there. Both the hoe and the loader look like you put some thought into it. They ought to serve you well.

Have fun... get 'em dirty!

larry