Xerox DocuPrint 4890 Manual page 49

Inks
5-9
9. Using the CCU handle, pull the CCU out of the printer until it
is completely in the cart.
10. Push down firmly on the cart pedal until you hear or feel a
click. The pallet, which now contains the CCU, is lowered into
the cart. If the pallet does not move, check that the CCU is all
the way out of the printer and push down on the pedal again.
Guide to Performing Routine Maintenance