Depends on how many times you've done it, and how recently you've been through the experience /forums/images/graemlins/tongue.gif. Taking the loader off is easier than putting it back on. Make *sure* you do it on a level surface, concrete is best, or it will be much more difficult.
My first time was probably about 30 minutes off, 45 or so back on? I can take it off in just a few minutes (maybe 5) and back on in about 10, unless I mess up the connectors (which I do most of the time because the darn colored dots that are supposed to tell you which hose for what connector are gone, and I haven't figured out how to label them in a way that will stay on during the rigors of use /forums/images/graemlins/crazy.gif - but I digress /forums/images/graemlins/grin.gif).
It isn't that bad, and the only way to learn how is to do it. And there are definately applications where the loader is a real pain, so if you don't need / want it on, take it off. But do have the manual handy /forums/images/graemlins/laugh.gif.