I didn稚 take time to look for the rest of the blade just assume it痴 where I stopped.
Break is pretty clean right at the bolt. I would blame abuse more than material fault.

As able to drop the pan assembly without too much effort, but I値l be doggone if I致e been able to free up the blade bolts. Of course my largest impact socket is 1 1/4, next regular socket is 1 1/2 and naturally the nut is 1 5/16. Just can稚 seem to budge it with a box wrench even though the threads are clean, flooded with PB Blaster, liquid Wrench, heated... guess I知 just going to have to cut off. New bolts and nuts would be in order and I hope I can find some in town tomorrow else I値l have to order. Likely will pick up appropriate impact socket too. Last time I had to special order Rhino wheel fork, hopefully the Kubota dealer or someone will have a suitable 7/8 alternative, seems a number of manufacturers use a keyed bolt.