3 point back hoe

[Rara Avis]

I believe far, far, more hoe mounted tractors are damaged by being driven too fast over rough ground than by using the hoe. A hoe, or any other heavy object, cantilevered on either end of a tractor will put tremendous force on the bell housing of the tractor in motion. I suspect you can miss use a hoe and damage the tractor, but it would take something really special if the stabilizers are correctly in place. If anyone can show some vector diagrams defining the forces that can do any more damage than bouncing the front or rear end of the tractor off the ground I will admit my miss understanding of the problem. The rear wheels and the stabilizers provide four points of location for the hoe forces. If the operator isn't moving the forces don't go anywhere else on the tractor. On the other hand it only takes a small drop off or abrupt rise to get 50 to 100 G's. Even a small hoe can weigh 1000 LB or more, times the cantilever distance. It is easy to get enough force to break anything.
Harold

Actually a backhoe operates most effectively from the TRIPOD position...stabilizers and front bucket being the only points of contact with the ground...WHEELS are UP...at least thats the way the International Union of Operating Engineers teach backhoe operations...in fact if you don't put the front bucket down and operate with the front wheels in contact with the ground you will experience bounce during the operation of a backhoe...

 

[rural2]

The dirt is not a problem other than hiding more cracks or other damage. Too bad on the visible welds/repairs though. I tried to google several search word combinations and didn't get any more than you did. Not really knowing what hoe your looking at and not knowing what type dirt you have I would still say there is probably a way better than average chance a 24" bucket would have to be replaced with smaller. As an example my 4690 has a 12" bucket and it is all it can do to handle our clay soils sometimes. These little hoes just don't have much power. I guess, if it were me, I would have to decide if I was just buying someone else's problems and/or whether I thought I could find a smaller bucket if needed. Your mileage may vary...
Good luck

I finally got a look at it today. It is in the back of his barn and kind of dirty. It has had some welding done to it, in fact part of the model# decal was messed up. It appears to be a Kubota 4530A. I googled several posibilities and that is the only one that worked. I only came up with three for sale ads though, no other info on it. JC

 

[RollTideRam]

It worries me that I can't find any info on it. I wonder if it was made by someone other than Kubota. JC

 

[Soundguy]

Hmm.. doesn't seem to me that it really matters what you are doing that breaks the tractor with the 3pt backhoe.. IE.. digging with it or driving across a rutted pasture... if the thing breaks in half.. it breaks in half. That's my point about a subframe stiffening things up and taking some of the stresses off the tranny/diffy casting bolts...

Soundguy

I believe far, far, more hoe mounted tractors are damaged by being driven too fast over rough ground than by using the hoe. A hoe, or any other heavy object, cantilevered on either end of a tractor will put tremendous force on the bell housing of the tractor in motion. I suspect you can miss use a hoe and damage the tractor, but it would take something really special if the stabilizers are correctly in place. If anyone can show some vector diagrams defining the forces that can do any more damage than bouncing the front or rear end of the tractor off the ground I will admit my miss understanding of the problem. The rear wheels and the stabilizers provide four points of location for the hoe forces. If the operator isn't moving the forces don't go anywhere else on the tractor. On the other hand it only takes a small drop off or abrupt rise to get 50 to 100 G's. Even a small hoe can weigh 1000 LB or more, times the cantilever distance. It is easy to get enough force to break anything.
Harold

 

[amitysanimal]

I have a Kubota B7100 with a 3pt backhoe on it. The tractor had over 7500 hours on it when I bought it and the meter was broken, so hard to say how many hours are actually on it. And by the looks of the hoe it was used quite a lot and it hasn't hurt the tractor any. It does have a subframe on it though. The subframe runs from the hoe up to the FEL frame, it doesn't bolt onto it, it just slides on over the angle iron.

I had a guy offer me $400.00 for mine, I told him I would keep it and use it to dig worms with before I would sell it for that. I am some glad I didn't sell it, I have used it quite a lot. I would jump on it for $900.00.

amitysanimal

 

[Soundguy]

That's the difference a subframe can make...

Soundguy

 

[Taiser]

Then there is the other thread with the Kioti WITH THE SUBFRAME and the frame still snapped!

http://www.tractorbynet.com/forums/...nds-ck25-broke-two.html?highlight=3pt+backhoe

I agree some 3pt have pretty sad attachments but Kubota's is unusually solid. I've seen the odd picture here and there of bell housings snapped off but they are RARE.

Subframe would be nice but it's not the be-all-end-all. No problems with mine and it covered fully under warranty if anything snaps so I don't worry. Nobody should be scared of a 3pt as long as it's attached properly. Anything will break if abused or not installed properly.