Use either a 7 or 8mm wrench, and press down on the (orange or white) caps, to release the hoses, and pull the hoses out. Then take the caps off. Then use a needle nose pliers to take the collets out. Then use a hooked pick to remove the o-rings and plastic washer.
When reinstalling the o-rings, be sure to use silicone lube to ensure smooth reentry, not only for the rings, but for the hoses as well.
Look at your hoses when you have them out, mine were crimped where the old o-rings had a death grip on them. I just cut about an inch off with a razor knife and reinstalled.
Good Luck!!