For an impressive color printer like the Oki C5500 expect that it has a bit complicated parts to deal with. A feature of this machine includes 4 different drums for each CMYK color. And each of these needs to be reset when it is refilled or replaced. The Okidata 43381704 drum (for black) for instance has a page yield of 20,000 pages but is usually the first one that gets depleted. After the replacement, here’s how to reset its drum life.