GRAPHTEC SignJet JS310-25ES Service Manual page 56

(5) Remove the caps attached to the print head, and then insert the inlet tube and outlet tube into the print head
inlet.
Inlet tube
Outlet tube
CAUTION:
Do not mistake the color of tubes when connecting the inlet tubes.
(6) Attached to the print head clamper to the print head and the inlet tube joints.
JS310-UM-251-9370
6. Initial Ink Induction Procedure
49
Print head clamp