HP Designjet 4000 Printer series - Manual (Page 123)

2. Open the door.
3. Each printhead cleaner has a handle on the front. To remove the cleaner, press
inward and upward as indicated by the arrow shown here, until the cleaner is
released.
4. Lift up the printhead cleaner to remove it from the slot, and slide it out horizontally
as shown below.
121
How do
I
handle
the
ink
system?