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replace head

  1. Anyone know why one of the dampers (damper number 4 which is black) wont fill up after replacing the whole head?

    So i just fully replaced the second head of the CJV300 and connected all the tubes properly from 1-8, they all filled up and worked perfectly fine when I tested them with a test print no issues! But for some reason one of the blacks doesn't work and it doesn't fill up no matter how much I tried...
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