Step 1: Take a crescent wrench and tighten it around the macroline right before it hits the fitting.
Step 2: After its tight, pull the hose away from the fitting with one hand, and the wrench away from the hose w/ the other hand (push the wrench into the fitting is another way to word this). The macro will come out with some force.
Step 3 and 4: Repeat steps 1 and 2 for the 2nd point of connection of the macroline.
When you're done doing w/e it is your doing, take the macro line and push it back into the fitting w/ your hands (no wrench required). Gas it up, and make sure the line went in far enought that there is no leaking. If it leaks, take the hose out, and push it back in again.