Towable backhoe

[12barber12]

Thank you all for your input I received my 20 gallon hydraulic tank today does anyone recommend a certain weight hydraulic fluid to run

 

[12barber12]

You guys are recommending me to use a single stage pump would this work

 

[3v0]

These are the specs on mine. They may be helpful to see if we are talking apples and apples.


My pump is 2.788gpm and motor is 7hp at 4000rpm but it does not seem to increase digging power over 3/4 throttle.

The other variable is the face area of the piston in the cylinders.

A contractor did some digging in the backyard with a tractor mounted hoe that is about 1/2 again as large as my Dirt Master. He commented on hard the dirt was. It does not present any problem to my toy. I have had trouble with tree roots and others have commented it does not work well if you have a lot of rocks. For that reason it would be nice to have more pressure but I have no idea how much more the hoe would take without busting it up. Maybe the right thing to do is to put a beefier cylinder on the curl.

I opted for the joysticks with the hydraulic operated front stabilizers. I could live without the joysticks but you would have to pry the hydraulic stablizers out of my cold dead hands.

I have a bx2200 that I use with it. I am in the process of adding a ball hitch to the back of my box blade so I can back the ball under the backhoe hitch and move it without getting off the tractor. Together the FEL boxblade and hoe are good combo.

I added an electronic hour meter to make it easier to keep track of when it needs to be greased. If one used it all day you could just grease it when you start and at lunch. But I use it an hour here and an hour there. It was too easy to go longer.

 

[Illini22]

While I don't recall pump size, I owned a ToeHoe 'Cricket' that only used a 5 hp Briggs that was awesome.
All the cylinders were only 2" with 3/4 shafts.
I could dig trenches 5 ft deep and 40-50 ft long in about 1/2 hr, haul out stones bugger than the 18" bucket.
There was enough power that once on a large rock it pulled the factory welding apart at the frame pivot point
And it was NOT slow, in fact swing was so fast that one had to feather the valve or overshoot.
Only real down side was that it used 4 valves (would have loved to convert to 2 'joy sticks' and they had installed internal limiter in the elevation cylinder,( probably for stability) so that I could not load a trailer or truck.

I post simply that you know that design is more important than HP and large cylinders.
While not an expert, I have operated many compact excavators and assure you that other than mobility issues that small 5 HP ToeHoe compared favorably in most aspects.

All

I used to love the dig its we used at the electri. Utility I worked at. Much stronger than the mini track hoes they have now. The trade off is they can fit thru a smaller opening with much less effort.

 

[12barber12]

I'm back again I put on a 20 gallon hydraulic tank it seem to work a little bit better but I still lost power

 

[3v0]

How about adding an oil cooler on a low pressure return.

But are you sure it is not the engine loosing power?

 

[12barber12]

They very well could be the engine never thought about it is there a way to check or my better off just trying an engine I have laying around

 

[dfkrug]

They very well could be the engine never thought about it is there a way to check or my
better off just trying an engine I have laying around

I reused engines I had lying around when I built my CADDigger as I mentioned above. If I did it again, I would
use either a water-cooled M/C engine, a twin engine from a lawn tractor, or at least a large OHV thumper. I
would run them at something LESS than full throttle.

 

[3v0]

I reused engines I had lying around when I built my CADDigger as I mentioned above. If I did it again, I would
use either a water-cooled M/C engine, a twin engine from a lawn tractor, or at least a large OHV thumper. I
would run them at something LESS than full throttle.

Is this because you need full throttle to get enough power but then everything moves too fast or are you thinking of the noise ?

 

[12barber12]

The engine rpms sound the same even when I lose power when it's cold it works good then after a lil while can barely pick the boom up with bucket empty