Stratasys J850 Manual page 63

6. Before returning the roller waste collector to the print block, make sure
that the pins are clean.
1. Return the roller waste collector to the print block and screw on the
covering (see Figure 4-46 on the previous page).
2. Loosen the screws securing the suction tube.
3. Lower the suction tube so that the hole in the panel behind the tube is
visible, and tighten the screws to secure the tube.
4. Attach the right-UV-lamp assembly to the print block and reconnect the
UV power and fan cables.
You should replace the roller scraper blade—
• after 1,000 hours of printing.
• if it does not effectively keep the roller clean.