Not sure exactly what set up you have, but on my coach I press a button and the 7500 quiet diesel rolls out on a track. I remove the cover off the bottom of the generator and drain the oil. Remove another cover and remove the filter. After you have installed the new filter and reapply the drain plug back on, then on the front of the generator you remove the plug that shows a picture of pour oil. That is where you pour the oil into the motor. It is also the dip stick to check how much oil you have in the engine. After you are done, just press the button again and the generator will roll back into the coach. Takes about half an hour to do this job.