HP Officejet Pro 8000 - A809 - Manual (Page 69)

5. Lift the handle of a printhead, and use it to pull the printhead out of its slot.
6. Before installing a printhead, shake the printhead up and down at least six times
while the printhead is still in its packaging.
7. Remove the new printhead from its package, and then remove its orange
protective caps.
CAUTION: Do not shake printheads after the caps are removed.
Maintain the printheads 65