Hitachi IJ PH Service Manual page 100

7 Remove the fixing screws (8 positions) at the upper and lower
connecting parts of the circulation unit. The pump unit can be removed.
"Caution 1": When removing the screws with a screwdriver, hold the
lower side of the unit door so that the unit door and hinge
may not be deformed.
"Caution 2": Put wiping paper under the pump unit to provide for an ink
drip.
Insert the screwdriver
from this slit.
Unit door
Fixing screw
(8 positions)
8 Clean the portion stained with ink and make sure that the O-rings (4
positions) are securely mounted in the concave parts of the lower-side
circulation unit.
procedure.
9 Perform "Ink refill" and adjust the pressure. Make sure that there is no
ink leak.
10 Reset the pump time to "0" on the "Parts usage time management"
screen.
Hold this portion.
Then, install a pump unit by reversing the above
4-11
*) This figure is for the
PXR-D. The main ink tank
is not attached for the
PXR-P.