Lectra Alys 30 - 6.1 Changing seals; 6.2 Removal;mounting of carbon sliding contacts

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The seals are the joints used to create a tight seal between the print heads
and the suction system during purging.
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Loosen the fastening screw and remove the carbon sliding contacts.
Change the carbon sliding contacts and reposition it so that it rubs correctly
on the balancing arm.
Tighten the screw lightly.
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