I have looked at both pictures and I believe that what you have is the newer style valve that is mounted to the older style upright by the bracket plate under the valve. If you look at the picture of the 2230, you will see how it is mounted to the tractor frame. I believe that if you can fashion the bracket that is welded to the frame, then you will also be able to mount your valve to the frame just like the 2230. My guess is that your tractor was made before the second design was completed, and they ran out of the older style valves and just started to use the newer style valve with the older mounting brackets. One thing to check is if the brochure for the newest
BX1500 shows a change in the valve to be like the
BX2230. It might just be that since the
BX1500 didn't get a model number change, neither did it get the upgrades that went with the
BX1830/2230. It would be a easy upgrade for the Kubota dealer to do, since you already have the newer valve. It might cost you $100 to have them do the fabrication and modification, but it would be well worth it just for the convenience factor. The only way that you will know for certain is to find a dealer that has a new production
BX1500 in inventory and for you to physically look at it. If it is different, take pictures and then start complaining. If it is the same, then you are stuck with what you have. One other thing is that Kubota reserves the right to make improvements at any time and that it doesn't require them to make upgrades to previously manufactured models. If you do find that a change was made, take pictures of it, so if you have to do the change yourself, you will have pictures for guidance