Help me identify this backhoe attachment

[bbtank45]

In fact, could I run a heavy chain from the drawbar to the top link (closer to the BH)? Drew a small moment diagram and it looks like it would suffice as long as im not fighting lateral loads, which i would expect to be countered by the stabilizers.

 

[ovrszd]

My neighbor's Woods had a triangulated assembly that fastened to the hoe down by the lower pins, at the top where your top link fastens. Created a triangle forward whose top link fastened to the tractor's top link hitch. This assembly could be adjusted by removing bolts and reinstalling in different holes. This allowed the assembly to be modified to fit most any tractor. Also allowed the hoe to be carried at a different height by the tractor. Once it was attached to the tractor the 3pt lever was left in the fully lowered position. The geometry of the triangle held the hoe in place. I don't recall it placing any lateral loads on the tractor. Might try Google searching Woods backhoes and find a picture of it all.

I've read a few horror stories about 3pt hoes shearing the top link pin and/or breaking the top link bracketry on the tractor. If the hoe bucket is in the wrong position the hoe is free to tip toward the hoe boom and throw the operator into the hole. My neighbor never had any problems like this but he was using it on a good sized AG tractor.

 

[ovrszd]

Here's an Ad with pics the show the hitch pretty well.

https://www.machinerytrader.com/listings/construction-attachment/for-sale/24573553/woods-bh1050

 

[bbtank45]

That appears to put all the load on the top link and pins. Would you agree that i could achieve the same effect if i chained from the drawbar up to the backhoe, close to the top pin.

Chain by Ben Burwinkel, on Flickr

 

[ovrszd]

Nope. You won't take any load off the top link with your chain idea. You also won't take any load off your 3pt and it will be required to hold the hoe at it's vertical position. That's bad.

I hated Geometry so will do a lousy job of explaining this. The Woods assembly creates a triangulated situation that removes all vertical weight from the 3pt hitch. As I said, the 3pt lever is kept in the lowered position. By adjusting the hitch you establish the carried height of the hoe. When you lower the stabilizers you relieve some of that duty from the tractor.

In my neighbor's case his tractor was overkill so the hoe never made the front of the tractor light. But the hoe created a "pull" force on the tractor and would try to drag it rearward. That force was exerted on the 3pt arms but in such a manner as to match their designed intent.

 

[bbtank45]

Interesting thought. How would you recommend I lock out the three point in my application?

 

[ovrszd]

By lock out, if you mean relieve vertical pressure from the 3pt, build a similar hitch as the Woods uses.

If you aren't worried about that pressure then run it like it is. Unless there's some missing pieces it's been used that way since new. :confused3:

I just think your 3pt is going to reach max load limit repeatedly as you dig. If you set the stabilizers and then lower the 3pt the weight of your tractor is never applied to stabilizing the hoe. I think you'll experience a LOT of movement of the hoe. Even when you swing to the side with a bucket full of material to dump. And digging to the side will probably be out of the question.

 

[bbtank45]

There are pieces missing, im fabricating to get it back to the proper setup. I suspect it was used incorrectly for a long time. Im wanting to transfer the weight of the tractor onto the hoe.

Im unsure what you mean by vertical pressure.


See post #15.

http://www.tractorbynet.com/forums/owning-operating/304477-3-pt-backhoe-2.html

 

[ovrszd]

Without some kind of triangulation the 3pt lift has to maintain hoe ride height. So if you place yourself to dig with stabilizers down and 3pt lift lever positioned to hold and start digging. As soon as the stabilizers start buryin themselves, which they will, the 3pt lift will have to bear the load applied as you dig. Not sure how powerful the hoe is. It's possible it could exert more down pressure on the 3pt than it's intended to carry?

The woods style hitch firmly attaches the hoe to the tractor. Doesn't allow vertical or lateral movement.

 

[majorwager]

bbtank45,
Agree w/ previous comments. . Not sure your rear axle configuration. On the IH, we ran a 5" channel under the axle, with a large U bolt over the axle through the flanges of the channel. The channels extend forward to the rear mounting holes for the FEL loader brackets at trans housing . None of the excavating torque or wt is carried on link arms. This stabilizes the top link because when there is flex on lower links, stress on top link is multiplied. I definitively tell you this BH w/ its' wt + digging torque, can rip top link and lowers arms completely of your tractor.