Korean buily gm vehicles have had a host of issues, the plants has lost money since the mid 2010's and didnt they shutdown in 2022? Not sure if they got back up n going yet or notThe hydrostatic pump is probably a purchased assembly from a OEM MFG and bolted in on the assembly line. I came from major automation. Most things like this are purchase components. Which can lead to difficulty getting parts.
As for South Korea. We had a huge gm line over there for powertrain. It was one of the best jobs we ever had and smoothest. Plant was amazing from what I heard and was one of the fastest to get up and running. I spent 7 years traveling the world installing machines, seeing others process. I have plenty of faith in Korean built tractors. Our laws may muck them up a bit with emissions etc , support may seem distant. But they make good products and quality.
I’ve seen plenty of new parts out of the box bad. Imagine shutting down a production line for 8 hours to install a $36000 spindle only to find out it’s bad internally from new. Hundreds of thousands of dollars are lost and another shift. We all have to face the growing pains.
Friends with the local kubota dealer/owners. Seen and heard enough head scratchers from them as well.
Pick your poison and how much weight out of the wallet you care to loose and work to happiness. Unfortunate it’s that way but it happens. I couldn’t justify the $20k more for a kubota with the options I needed. These are tools and part of our jobs for some of us. So valuable consideration goes into the purchase of these units. Especially when you get north of 50k.
I think a good majority of issues are how people use them. They think Hp/implement size when that’s completely wrong. Your ground will determine your needs. I have heavy clay here and it’s abusive and hard on equipment. Eats a lot of hp ,hard to dig in etc. Always step up a bit bigger then you think you need if you can afford it. My mt5 sure has great loader specs. Stick it in this clay and you will easily bend a frame if you abuse it. Moving loose material not a problem all day.
Hopefully you will find something you are satisfied with in the end.