Thanks Good suggestions, I just emailed the pictures to the Kubota dealer. Although the TLB (3710), is 2000 vintage the Service Manager said he would talk with the Kubota service rep. about warranty or a good will adjustment, so we will see what Kubota thinks. Do you think it was made in the USA or assembled in the US? I think I was a bad weld, maybe overheated, I don't know if these are human or robot welds.
The tractor is stored in a garage and rarely gets wet so there was no tell-tale rust weep so there could be other cracks. Here is a picture of the tractor and it逞エ hard to believe it 8 years old but it逞エ only has 650 hour. I will update when I hear back from the dealer.
I don稚 know how I lived for 50 years without a frontend loader.