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8 Remove the fixing screws (8 positions) which connects both the upper part and the lower 
part of the circulation unit.    The pump unit can be removed. 
 
 [Caution] Put wiping paper under the pump unit to provide for an ink drip. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
9  Clean  the  portion  stained  with  ink  and  make  sure  that  the  O-rings  (4  positions)  are 
securely mounted in the concaves of the lower-side circulation unit.    Then, install the 
new pump unit in reverse order of the procedures above. 
 
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.