Thanks to everyone for their answers. I do believe that I'm just going to do it myself next weekend.
I don't have a relationship yet with the local dealer because I purchased from a dealer near my current home and store the tractor at new construction that I'm moving to next month. I had a good experience at a dealer in Santa Ana, CA (Eberhard Equipment). Pricing was great, sales was informative, and they delivered over 100 miles away, etc. The owner even recommended that I purchase from the other dealer who was closer to the new home to ease any warranty issues, but I couldn't get the deal I needed there because it included a used backhoe on a new tractor.
He said the other dealer would take care of me and he knew the owner of that dealership, but that Kobuta dealers are lucky to break even on warranty work due to labor costs out here.
When the Eberhard realized that I needed a mid-PTO
B7800 with folding ROPS to mount the used backhoe, they ate the cost and honored our quote.
Yesterday, I separated the left front tire from the rim... called the new dealer in Temecula, CA but their service was closed til Monday. I guess that is normal with the holiday weekend. After taking the wheel off, I think I can fix it... seems like sideways pressure just popped the seal. I noticed that the valve cap is missing, so perhaps dirt wedged in the valve and drained the pressure down. I was working in a rough area with steep hillsides.