580K hydraulic problems... or over expectation?

I'm trying to figure something out. I have a 580k that turned into a nightmare shortly after buying it, was sold as jobsite ready back in Sept and to date I've put 18 hours on it, 6 of which was today. About a week after I got it in a cylinder blew out, really frustrating story short every single cylinder in the entire backhoe has been replaced, along with 90% of the entire hose system (I've put 60 gallons of hydraulic fluid in it in 18 hours to give an idea of how many times stuff blew on...

580K hydraulic problems... or over expectation?

580K hydraulic problems... or over expectation?