Changing the hydraulic oil in our Bobcat 2035 tractor after it's initial 50 hour break in period. Usually this would be a quick and uneventful project, but not this time. Fortunately, if I ever have to do it again, it will be a lot easier after installing the new filters properly. I couldn't believe how tightly they'd been screwed on at the factory where I'm guessing they probably didn't oil the filter gaskets either!!!!