Hitachi IJ UX Service Manual page 156

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4.8.3
Pump head replacement
Perform "Ink drainage" to "Pressure relief".
1
Turn off the power supply.
2
3 Perform "4.8.2Drive unit replacement procedure" and remove the drive unit .
Remove the fixing screws (2 positions) and remove the pump head.
4
[Example] The following figure below indicates the case of the circulation pump head
removal.
[Caution] Be careful not to lose the O-ring.
Supply pump
Pump head (Circulation pump)
Circulation pump
Makeup pump
Fixing screws (2 pieces)
4-23
Recovery pump
O-ring

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