I have had no mechanical issues at all. I also own a Kubota M 7040 Cab tractor with 1153 loader. Purchased 6/6/20012; 2007 model. I have had more trouble in 6 months with this loader than with the Taz loader, and I have used it for 14 years.
The Kubota cylinders needed to be recalled but were not. You can find hundreds of online testimonials to this problem.
Seal kits cost 120 for each cylinder. Parts also seem to be at least 3 times what they should be. I thought green tractor parts were high---I was mistaken. I bought it for hay cutting and baling. Cab=air conditioning.