Greetings Grandad4,
I can't speak from my own experience, but I've read of several who converted a bx2660 or bx2670 to Use a kubota bx24 or bx25 backhoe. cschlze is one.
I also read of a poster who had the unfortunate luck of having his newer bx25d get caught in a fire. His bh with less than 3 hours on it wasn't in the same building . . so he pulled off all the subframe from his bx25d and was going to sell the subframe parts and the near new bh. To someone who might be interested in converting a unit because his insurance company didn't want the shiny new bh.
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I also read in another thread where adding the new aftermarket Woods bh to a BX2670-1 would price out at less than $5500. Typically the backhoe difference between a bx2370-1 and a bx25d is 4500 plus tax plus 3pt hitch cost. But my understanding is that the new Woods bh offers superior capacity etc. to the bx25d. Once again its a 2 step effort but it does allow for a quality larger bx to be used with a quality implement with good or better options or performance than the smaller bx25d offers.
Thanks for this... had not seen those threads about mounting the little Kub BH on a standard BX. Also not surprised Woods brought out a souped-up BH to compete better against the OEM product.
In both situations I would pay attention to the lack of frame reinforcement on the standard BX model when using the backhoe. The twisting forces a BH can put on a tractor when doing off-centerline digging can be severe. Evidently Kub thought the standard BX frame was vulnerable to damage and beefed-up the frame accordingly. If one is using a hybrid BH setup or an aftermarket hoe, conservative use would seem to make sense to me.