Hitachi IJ RX2 Service Manual page 143

8 Remove the fixing screws (8 positions) at the upper and lower
connecting parts of the circulation unit. The pump unit can be removed.
"Caution": Put wiping paper under the pump unit to provide for an ink drip.
Fixing screw
( 8 positions )
9 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. Then, install a
pump unit by reversing the above procedure.
10 Perform "Ink refill" and adjust the pressure. Make sure that there is no ink leak.
11 Reset the pump time to "0" on the "Parts usage time management" screen.
4-19