L2800HST-F serial 53628 was sold new in 2005 to someone who had Midlothian, TX address
Kubota tractors don't have official "year models", but I bet you could call it an 05 model.
very seldom I did much work to the L2800 and L3400. Rarer yet L3700 but they weren't quite as commonly purchased.
PTO cams were more frequent than I liked, Kubota updated the early units at the factory and a few in the field. 53628 was done about a year or so after it was originally purchased. When you engage the pto, make sure the clutch is pushed in, you'll be fine. The other common complaint was the jerky 3ph, as said, repairable with a new position control valve
kubota does use serial numbers....not necessarily the same serial on two identical tractors, but a lot of times the same last 5 digits on two (or more) machines that are VERY similar. I have a ZG127, the serial number is identical to another ZG127. Mine is a ZG127S, the other is a ZG127E. Hence, they've now gone to 17 character VIN similar to automotive stuff, and a QR code that is super easy to scan and check without having to enter in the whole thing. For techs and Kubota dealer staff, the app is awesome. Should've been implemented years ago if you ask me. Income generator if you know how to use it.