Tractor backhoe - homemade

[madmax12]

That is really impressive. Great Job!

 

[Gale Hawkins]

These are the kinds of skills to have in retirement if 1% of the stuff posted on the retirement thread happens.

 

[Luremaker]

Wow amazing work you have done there. How many hours to make your subframe?

Interesting... you saddles are at the top and pins are on the bottom. My Woods subframe is just the opposite, saddles down low and the pins are at the top.

 

[reggiejr]

At this point I'm not really sure but it should not be over 3000$...hopefully
I've managed to get some of those thicker plates from the scrapyard (remains from big projects which are disposed from large factories).
That's not actual scrap, it's new metal but some parts were already cut out...sometimes they cut it the wrong way or wrong patterns so they dump it and then I get it at a lower price
Material for the main frame, buckets and boom is brand new and I bought it in store. Pumps, joysticks and bucket teeth were ordered brand new. The only old parts will be the cylinders. 3 from an old JCB, 3 from O&K excavator and one from MF backhoe. I will replace all the seals and O rings so they should work just fine
I wanted to buy all new parts but of course, "time ($$$)" is always an issue

very interested to see your progress.

 

[David Devuono]

Very nice work and looks heavy duty. I know it takes me hours to cut and shape 1/4 inch plate and that stuff looks a lot thicker. I wonder why the tandem pumps? Is it to power something like a jack hammer? Most people who use the tractor hydraulics have to turn the RPM down to give them better control. With dual pumps that thing may just fly.

 

[BFreaky]

Very nice work and looks heavy duty. I know it takes me hours to cut and shape 1/4 inch plate and that stuff looks a lot thicker. I wonder why the tandem pumps? Is it to power something like a jack hammer? Most people who use the tractor hydraulics have to turn the RPM down to give them better control. With dual pumps that thing may just fly.

most of these plates are 15 mm thick, and the large ones with hooks are 25 mm. Tandem pumps are here to get a quick and smooth operation of the machine. Hydraulic flow through the joysticks is 80 liter/minute, and the cylinder diameter will be 135 mmon the largest and 100 on the smallest. I"ve calculated cycle times and they all come up to 5-6 seconds on large cylinders except on the boom swing, but there I plan to install a flow limit valve to make it slower

 

[Woody65]

Me compliments. That is some really nice work. Can't wait to see it come together.

 

[Turbys_1700]

You have skills that are to die for...
Might I ask a question?
Where did you receive your training?
I assume that you are a mechanical engineer.

 

[BFreaky]

You have skills that are to die for...
Might I ask a question?
Where did you receive your training?
I assume that you are a mechanical engineer.

This started as a hobby when I was very young (now I'm 28 years old). I learned all these skills mostly by my self.
I'm not a mechanical engineer, I graduated electrical engineering, but was always far more interested in mechanics.
This is not the only machine I've constructed, there are a lot of them; this one is just the most complicated

 

[Relic]

Very good planing for sure.I Do like Ur drawings.I couldn't draw to save My soul.

 

[BFreaky]

Very good planing for sure.I Do like Ur drawings.I couldn't draw to save My soul.

I always start every project with alot of freehand drawnings. That way I visualize my ideas and improve them along the way.
Here is a picture of my previous project; a front 3 point linkage for my Belarus 820. I don't like to buy expensive attachments, I rather construct them alone; that way I save money and get a machine just the way I like it

 

[BelarusBulldog]

Excellent craftsmanship, and your ability to put your thoughts to paper is amazing!

 

[dfkrug]

That looks great, BF! I see you got some of your design inspirations from
industrial hoes, rather than compact tractor attachments:
No pin sharing between boom and dipper cylinders, dual hyd pumps for
swing and other functions. Nice.

I am a big fan of front 3-pt hitches, too.

 

[BFreaky]

That looks great, BF! I see you got some of your design inspirations from
industrial hoes, rather than compact tractor attachments:
No pin sharing between boom and dipper cylinders, dual hyd pumps for
swing and other functions. Nice.

I am a big fan of front 3-pt hitches, too.

As far as I'm concerned, tractor without a front linkage or without front loader is far less usefull, especially if it's got a high HP engine.
Well, in my opinion two pin design should be better because of stress distribution and the pins should last longer in comparission with one pin design.
There will be greater touch surface between pin and bushings...so it should result in less wear...

 

[cartod]

I would want you on my team.

 

[boxorox]

looks great . I would love to see some pictures of some of your other stuff you have built.

 

[BFreaky]

looks great . I would love to see some pictures of some of your other stuff you have built.

Well, that's kinda off topic (sorry), but here are a few pictures...

Subframe for my mini tractor; with front linkage for dozer blade or other attachments. This is not finished yet...

...and a little grader, similar to the ones you use in USA, but with some of my ideas built in (and curved design because i don't like square designs and sharp edges..)
It's gonna have a roller on the back, with hydraulic leveling because I believe it would be better if this kind of graded surface gets some compaction after grading...
Also, roller should add weight to the whole machine so it will not jump on hard surfaces and this way it will achieve better surface penetration.
On the other hand, when the roller is at it's lowest position, the rest of the machine will be in the air adding weight for better compaction...
I wanted to create a multipurpuse machine...sort of "all in one"...

 

[Rich lee]

I'm glad I finally checked into this site. Gee! is all I can say about your "home build-it" back hoe attachment! Very nice five minute sketch as well. Aren't CNC's great to work behind? Your weld beads are code--for sure.
Be looking for finals as well.

 

[rScotty]

This started as a hobby when I was very young (now I'm 28 years old). I learned all these skills mostly by my self.
I'm not a mechanical engineer, I graduated electrical engineering, but was always far more interested in mechanics.
This is not the only machine I've constructed, there are a lot of them; this one is just the most complicated

Nice work and a nice project. You and I agree on the hand sketches; even crude ones are faster when doing rough design. Plus it's lots more fun.

One thing I didn't appreciate until getting there is that in a traditional engineering education the first few years of engineering courses are similar - sometimes identical - regardless of the eventual specialty. So the various fields of engineering aren't all that far apart. A lot of engineering work is surprisingly similar.

The result is that an engineering education is pretty portable, even when working the technical side. I went to college later in life (I'm 66 now, graduated at 50). My degree is in civil, but most work has been mechanical or electrical.
Luck,
rScotty

 

[Dr Dave]

Nice drawings, I like what you have built so far,your an artist and a craftsman!

Dave