Somewhere I read park on a slight hill with filter on the uphill side. Plug the vent hole while changing. If none of that is needed I can just unscrew old and install new filter. This filter I am changing is part #HHK70-14070. Are there other hydraulic or transmission filters that should be changed at 50 hours.
I put a clean bucket/pan under the filter, catch any oil that drains out while swapping filters. I reinstall any drained oil, running it through a paint filter in the funnel.
Go to youtube and search for Kubota 50 Hour Service. Very good video on there. I watched it before doing mine. Gave me a lot of confidence before starting the project.