Hitachi UX Twin Nozzle - Pump Head Replacement

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4.8.3 Pump head replacement
1 Perform “Ink drainage” to “Pressure relief”.
2 Turn off the power supply.
3 Perform “4.8.2 Drive unit replacement procedure” and remove the drive unit .
4 Remove the fixing screws (2 positions) and remove the pump head.
[Example] The following figure below indicates the case of the makeup pump head
removal.
[Caution] Be careful not to lose the O-ring.
O-ring
Pump head (Makeup pump)
Supply pump
Makeup pump
Circulation pump
Recovery pump
Fixing screws (2 pieces)