11. Remove the hub of the lower roll by pressing on the tab, then remove the lower roll.
Dispose of the roll of used cleaning material according to the instructions provided with the new
r
oll. Also consult your local authorities to determine the correct manner in which to dispose of
wastes.
12. Remove the hub of the upper roll, then remove the roll core and place it on the lower axle.
122 Chapter 11 Hardware maintenance